./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1-modified_false-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1-modified_false-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f55c3c29f65baba8ba49ec35fe2e62008dfb74b3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 13:29:16,572 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:29:16,573 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:29:16,580 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:29:16,580 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:29:16,581 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:29:16,582 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:29:16,583 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:29:16,584 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:29:16,584 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:29:16,585 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:29:16,585 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:29:16,586 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:29:16,586 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:29:16,587 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:29:16,588 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:29:16,588 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:29:16,589 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:29:16,590 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:29:16,592 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:29:16,592 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:29:16,593 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:29:16,594 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:29:16,595 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:29:16,595 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:29:16,595 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:29:16,596 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:29:16,597 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:29:16,597 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:29:16,598 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:29:16,598 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:29:16,599 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:29:16,599 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:29:16,599 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:29:16,599 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:29:16,600 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:29:16,600 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-18 13:29:16,610 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:29:16,610 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:29:16,611 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:29:16,611 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 13:29:16,611 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 13:29:16,611 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 13:29:16,611 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 13:29:16,611 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 13:29:16,611 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 13:29:16,611 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 13:29:16,612 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 13:29:16,612 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 13:29:16,612 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 13:29:16,612 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:29:16,612 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 13:29:16,612 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:29:16,613 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:29:16,613 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:29:16,613 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:29:16,613 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:29:16,613 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 13:29:16,613 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:29:16,613 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:29:16,613 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:29:16,614 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:29:16,614 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:29:16,614 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:29:16,614 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:29:16,614 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:29:16,614 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:29:16,614 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:29:16,615 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:29:16,615 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 13:29:16,615 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:29:16,615 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:29:16,615 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 13:29:16,615 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan 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 -> Taipan 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 -> f55c3c29f65baba8ba49ec35fe2e62008dfb74b3 [2018-11-18 13:29:16,638 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:29:16,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:29:16,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:29:16,650 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:29:16,650 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:29:16,650 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1-modified_false-termination_true-no-overflow.c [2018-11-18 13:29:16,687 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/data/3e858c78b/87561c5d2c3b40199a25a7ab9c2614ca/FLAG1426b168b [2018-11-18 13:29:16,978 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:29:16,978 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1-modified_false-termination_true-no-overflow.c [2018-11-18 13:29:16,982 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/data/3e858c78b/87561c5d2c3b40199a25a7ab9c2614ca/FLAG1426b168b [2018-11-18 13:29:16,990 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/data/3e858c78b/87561c5d2c3b40199a25a7ab9c2614ca [2018-11-18 13:29:16,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:29:16,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 13:29:16,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:29:16,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:29:16,996 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:29:16,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:29:16" (1/1) ... [2018-11-18 13:29:16,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4915a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:16, skipping insertion in model container [2018-11-18 13:29:16,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:29:16" (1/1) ... [2018-11-18 13:29:17,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:29:17,015 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:29:17,115 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:29:17,117 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:29:17,126 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:29:17,134 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:29:17,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17 WrapperNode [2018-11-18 13:29:17,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:29:17,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 13:29:17,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 13:29:17,135 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 13:29:17,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 13:29:17,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:29:17,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:29:17,147 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:29:17,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... [2018-11-18 13:29:17,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:29:17,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:29:17,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:29:17,159 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:29:17,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/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 [2018-11-18 13:29:17,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:29:17,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:29:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:29:17,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:29:17,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:29:17,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:29:17,347 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:29:17,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:29:17 BoogieIcfgContainer [2018-11-18 13:29:17,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:29:17,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:29:17,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:29:17,350 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:29:17,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:29:16" (1/3) ... [2018-11-18 13:29:17,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f996f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:29:17, skipping insertion in model container [2018-11-18 13:29:17,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:29:17" (2/3) ... [2018-11-18 13:29:17,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f996f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:29:17, skipping insertion in model container [2018-11-18 13:29:17,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:29:17" (3/3) ... [2018-11-18 13:29:17,357 INFO L112 eAbstractionObserver]: Analyzing ICFG BradleyMannaSipma-CAV2005-Fig1-modified_false-termination_true-no-overflow.c [2018-11-18 13:29:17,363 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:29:17,368 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-18 13:29:17,378 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-18 13:29:17,398 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:29:17,398 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:29:17,398 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:29:17,398 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:29:17,398 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:29:17,398 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:29:17,399 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:29:17,399 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:29:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-11-18 13:29:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 13:29:17,415 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:29:17,415 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:29:17,417 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 13:29:17,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash 409964900, now seen corresponding path program 1 times [2018-11-18 13:29:17,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:29:17,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:17,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:17,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:17,456 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:29:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:17,537 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:29:17,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:29:17,537 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:29:17,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 13:29:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 13:29:17,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 13:29:17,553 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2018-11-18 13:29:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:29:17,643 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2018-11-18 13:29:17,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:29:17,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-18 13:29:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:29:17,650 INFO L225 Difference]: With dead ends: 35 [2018-11-18 13:29:17,650 INFO L226 Difference]: Without dead ends: 20 [2018-11-18 13:29:17,652 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:29:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-18 13:29:17,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-18 13:29:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 13:29:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-11-18 13:29:17,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2018-11-18 13:29:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:29:17,675 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-11-18 13:29:17,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 13:29:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-11-18 13:29:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 13:29:17,675 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:29:17,676 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:29:17,676 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 13:29:17,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash 409965092, now seen corresponding path program 1 times [2018-11-18 13:29:17,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:29:17,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:17,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:17,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:17,678 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:29:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:17,720 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:29:17,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:29:17,721 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:29:17,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 13:29:17,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 13:29:17,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 13:29:17,723 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2018-11-18 13:29:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:29:17,768 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-11-18 13:29:17,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:29:17,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-18 13:29:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:29:17,769 INFO L225 Difference]: With dead ends: 22 [2018-11-18 13:29:17,769 INFO L226 Difference]: Without dead ends: 20 [2018-11-18 13:29:17,770 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:29:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-18 13:29:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-18 13:29:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 13:29:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-11-18 13:29:17,773 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2018-11-18 13:29:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:29:17,773 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-11-18 13:29:17,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 13:29:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-11-18 13:29:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 13:29:17,774 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:29:17,774 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:29:17,774 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 13:29:17,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash -246154182, now seen corresponding path program 1 times [2018-11-18 13:29:17,775 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:29:17,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:17,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:17,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:17,776 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:29:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:17,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:17,810 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:29:17,811 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 13:29:17,812 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [21], [22], [24], [40], [41], [42] [2018-11-18 13:29:17,839 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:29:17,839 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:29:17,920 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:29:17,921 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 4. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 13:29:17,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:17,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:29:17,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:17,926 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/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 [2018-11-18 13:29:17,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:17,933 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:29:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:17,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:29:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:17,988 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:29:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,040 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:29:18,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2018-11-18 13:29:18,041 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:29:18,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:29:18,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:29:18,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:29:18,041 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2018-11-18 13:29:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:29:18,079 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-11-18 13:29:18,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:29:18,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 13:29:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:29:18,080 INFO L225 Difference]: With dead ends: 40 [2018-11-18 13:29:18,080 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 13:29:18,081 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:29:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 13:29:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-11-18 13:29:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 13:29:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-11-18 13:29:18,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2018-11-18 13:29:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:29:18,085 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-11-18 13:29:18,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:29:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-11-18 13:29:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 13:29:18,086 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:29:18,086 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:29:18,086 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 13:29:18,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:18,086 INFO L82 PathProgramCache]: Analyzing trace with hash -246153990, now seen corresponding path program 1 times [2018-11-18 13:29:18,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:29:18,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:18,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:18,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:18,088 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:29:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:18,121 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:29:18,121 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 13:29:18,121 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [22], [24], [26], [27], [40], [41], [42] [2018-11-18 13:29:18,122 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:29:18,122 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:29:18,132 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:29:18,132 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 4. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 13:29:18,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:18,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:29:18,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:18,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/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 [2018-11-18 13:29:18,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:18,144 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:29:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:18,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:29:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:29:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:29:18,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-11-18 13:29:18,260 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:29:18,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:29:18,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:29:18,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:29:18,261 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2018-11-18 13:29:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:29:18,370 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2018-11-18 13:29:18,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 13:29:18,371 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-11-18 13:29:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:29:18,372 INFO L225 Difference]: With dead ends: 60 [2018-11-18 13:29:18,372 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 13:29:18,372 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2018-11-18 13:29:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 13:29:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-11-18 13:29:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 13:29:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2018-11-18 13:29:18,378 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2018-11-18 13:29:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:29:18,379 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2018-11-18 13:29:18,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:29:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2018-11-18 13:29:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 13:29:18,379 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:29:18,380 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:29:18,380 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 13:29:18,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:18,380 INFO L82 PathProgramCache]: Analyzing trace with hash 961216640, now seen corresponding path program 1 times [2018-11-18 13:29:18,380 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:29:18,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:18,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:18,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:18,382 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:29:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:18,413 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:29:18,413 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 13:29:18,413 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [21], [26], [28], [30], [40], [41], [42] [2018-11-18 13:29:18,414 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:29:18,414 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:29:18,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:29:18,424 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 3. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 13:29:18,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:18,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:29:18,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:18,428 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/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 [2018-11-18 13:29:18,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:18,436 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:29:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:18,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:29:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,479 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:29:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:29:18,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2018-11-18 13:29:18,507 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:29:18,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:29:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:29:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:29:18,507 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2018-11-18 13:29:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:29:18,528 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2018-11-18 13:29:18,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:29:18,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 13:29:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:29:18,529 INFO L225 Difference]: With dead ends: 42 [2018-11-18 13:29:18,529 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 13:29:18,530 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:29:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 13:29:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2018-11-18 13:29:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 13:29:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-11-18 13:29:18,534 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2018-11-18 13:29:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:29:18,534 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-11-18 13:29:18,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:29:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-11-18 13:29:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 13:29:18,535 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:29:18,535 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:29:18,535 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 13:29:18,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:18,536 INFO L82 PathProgramCache]: Analyzing trace with hash 961216832, now seen corresponding path program 1 times [2018-11-18 13:29:18,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:29:18,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:18,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:18,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:18,537 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:29:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:18,558 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:29:18,558 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 13:29:18,558 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [26], [27], [28], [30], [40], [41], [42] [2018-11-18 13:29:18,559 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:29:18,559 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:29:18,565 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:29:18,565 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 3. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 13:29:18,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:18,567 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:29:18,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:18,567 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/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 [2018-11-18 13:29:18,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:18,574 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:29:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:18,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:29:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:29:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:29:18,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2018-11-18 13:29:18,630 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:29:18,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:29:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:29:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:29:18,631 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2018-11-18 13:29:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:29:18,677 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2018-11-18 13:29:18,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:29:18,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 13:29:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:29:18,680 INFO L225 Difference]: With dead ends: 55 [2018-11-18 13:29:18,680 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 13:29:18,681 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:29:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 13:29:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2018-11-18 13:29:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 13:29:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-11-18 13:29:18,684 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2018-11-18 13:29:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:29:18,684 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-11-18 13:29:18,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:29:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-11-18 13:29:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 13:29:18,685 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:29:18,685 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:29:18,685 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 13:29:18,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash -757382272, now seen corresponding path program 1 times [2018-11-18 13:29:18,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:29:18,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:18,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:18,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:29:18,686 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:29:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:18,744 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:29:18,744 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-11-18 13:29:18,744 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [22], [24], [26], [27], [28], [30], [40], [41], [42] [2018-11-18 13:29:18,745 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:29:18,745 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:29:18,756 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:29:18,757 INFO L272 AbstractInterpreter]: Visited 15 different actions 15 times. Never merged. Never widened. Performed 36 root evaluator evaluations with a maximum evaluation depth of 4. Performed 36 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 4 variables. [2018-11-18 13:29:18,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:29:18,761 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:29:18,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:29:18,761 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/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 [2018-11-18 13:29:18,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:29:18,771 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:29:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:29:18,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:29:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,817 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:29:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:29:18,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:29:18,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2018-11-18 13:29:18,926 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:29:18,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 13:29:18,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 13:29:18,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:29:18,927 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2018-11-18 13:29:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:29:19,290 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2018-11-18 13:29:19,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-18 13:29:19,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2018-11-18 13:29:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:29:19,291 INFO L225 Difference]: With dead ends: 71 [2018-11-18 13:29:19,291 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 13:29:19,292 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1129, Unknown=0, NotChecked=0, Total=1640 [2018-11-18 13:29:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 13:29:19,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 13:29:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 13:29:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 13:29:19,293 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-11-18 13:29:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:29:19,294 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 13:29:19,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 13:29:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 13:29:19,294 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 13:29:19,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 13:29:19,317 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:29:19,329 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:29:19,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:29:19,332 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 13:29:19,421 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 13:29:19,421 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 13:29:19,422 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 16 30) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 27) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 16 30) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-11-18 13:29:19,422 INFO L425 ceAbstractionStarter]: For program point mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2018-11-18 13:29:19,423 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 16 30) the Hoare annotation is: true [2018-11-18 13:29:19,423 INFO L425 ceAbstractionStarter]: For program point L22(lines 22 26) no Hoare annotation was computed. [2018-11-18 13:29:19,423 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 28) no Hoare annotation was computed. [2018-11-18 13:29:19,423 INFO L421 ceAbstractionStarter]: At program point L22-2(lines 21 27) the Hoare annotation is: (and (<= 0 main_~y1~0) (<= 0 main_~y2~0) (<= main_~y2~0 2147483647) (<= main_~y1~0 2147483647)) [2018-11-18 13:29:19,423 INFO L425 ceAbstractionStarter]: For program point L20-1(lines 20 28) no Hoare annotation was computed. [2018-11-18 13:29:19,423 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-11-18 13:29:19,423 INFO L425 ceAbstractionStarter]: For program point mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2018-11-18 13:29:19,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:29:19 BoogieIcfgContainer [2018-11-18 13:29:19,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:29:19,430 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:29:19,430 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:29:19,431 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:29:19,431 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:29:17" (3/4) ... [2018-11-18 13:29:19,433 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 13:29:19,436 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 13:29:19,436 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 13:29:19,439 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-18 13:29:19,439 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 13:29:19,439 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 13:29:19,466 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d2b30ba3-fc60-4b68-a61d-2e4bee27177d/bin-2019/utaipan/witness.graphml [2018-11-18 13:29:19,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:29:19,467 INFO L168 Benchmark]: Toolchain (without parser) took 2474.76 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 226.0 MB). Free memory was 959.1 MB in the beginning and 1.2 GB in the end (delta: -245.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:29:19,468 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:29:19,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.78 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:29:19,468 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.33 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:29:19,468 INFO L168 Benchmark]: Boogie Preprocessor took 11.61 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:29:19,469 INFO L168 Benchmark]: RCFGBuilder took 188.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -185.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-18 13:29:19,469 INFO L168 Benchmark]: TraceAbstraction took 2082.34 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -81.7 MB). Peak memory consumption was 324.6 MB. Max. memory is 11.5 GB. [2018-11-18 13:29:19,469 INFO L168 Benchmark]: Witness Printer took 36.20 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. [2018-11-18 13:29:19,471 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 140.78 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.33 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.61 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 188.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -185.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2082.34 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -81.7 MB). Peak memory consumption was 324.6 MB. Max. memory is 11.5 GB. * Witness Printer took 36.20 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((0 <= y1 && 0 <= y2) && y2 <= 2147483647) && y1 <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 4 error locations. SAFE Result, 2.0s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 59 SDtfs, 169 SDslu, 119 SDs, 0 SdLazy, 346 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 237 GetRequests, 151 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 68 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 15 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 412 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 396 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 258 ConstructedInterpolants, 15 QuantifiedInterpolants, 22254 SizeOfPredicates, 10 NumberOfNonLiveVariables, 169 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 28/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...