./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-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_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/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 6c09c2a46ed7454ea61f3b2ddb99e3e2ba9fd4da ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 17:39:54,110 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 17:39:54,111 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 17:39:54,117 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 17:39:54,117 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 17:39:54,118 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 17:39:54,119 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 17:39:54,120 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 17:39:54,121 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 17:39:54,122 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 17:39:54,122 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 17:39:54,123 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 17:39:54,123 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 17:39:54,124 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 17:39:54,125 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 17:39:54,125 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 17:39:54,126 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 17:39:54,127 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 17:39:54,128 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 17:39:54,130 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 17:39:54,130 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 17:39:54,131 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 17:39:54,133 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 17:39:54,133 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 17:39:54,133 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 17:39:54,134 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 17:39:54,135 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 17:39:54,135 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 17:39:54,136 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 17:39:54,136 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 17:39:54,137 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 17:39:54,137 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 17:39:54,137 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 17:39:54,137 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 17:39:54,138 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 17:39:54,139 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 17:39:54,139 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-18 17:39:54,147 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 17:39:54,147 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 17:39:54,148 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 17:39:54,148 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 17:39:54,148 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 17:39:54,148 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 17:39:54,148 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 17:39:54,148 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 17:39:54,149 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 17:39:54,149 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 17:39:54,149 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 17:39:54,149 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 17:39:54,149 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 17:39:54,150 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 17:39:54,150 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 17:39:54,150 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 17:39:54,150 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 17:39:54,150 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 17:39:54,151 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 17:39:54,151 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 17:39:54,151 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 17:39:54,151 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 17:39:54,151 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 17:39:54,151 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 17:39:54,152 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 17:39:54,152 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 17:39:54,152 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 17:39:54,152 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 17:39:54,152 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:39:54,152 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 17:39:54,153 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 17:39:54,153 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 17:39:54,153 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 17:39:54,153 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 17:39:54,153 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 17:39:54,153 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 17:39:54,153 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_15e051f0-8520-4243-a78d-992ba732e13a/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 -> 6c09c2a46ed7454ea61f3b2ddb99e3e2ba9fd4da [2018-11-18 17:39:54,175 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 17:39:54,183 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 17:39:54,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 17:39:54,186 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 17:39:54,186 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 17:39:54,187 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-11-18 17:39:54,222 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/data/3be0badd4/080cd4d032024af5aec764b12eee2130/FLAGbe731a0e9 [2018-11-18 17:39:54,519 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 17:39:54,519 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-11-18 17:39:54,523 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/data/3be0badd4/080cd4d032024af5aec764b12eee2130/FLAGbe731a0e9 [2018-11-18 17:39:54,532 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/data/3be0badd4/080cd4d032024af5aec764b12eee2130 [2018-11-18 17:39:54,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 17:39:54,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 17:39:54,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 17:39:54,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 17:39:54,539 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 17:39:54,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@88e9939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54, skipping insertion in model container [2018-11-18 17:39:54,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 17:39:54,562 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 17:39:54,660 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:39:54,662 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 17:39:54,671 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:39:54,679 INFO L195 MainTranslator]: Completed translation [2018-11-18 17:39:54,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54 WrapperNode [2018-11-18 17:39:54,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 17:39:54,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 17:39:54,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 17:39:54,680 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 17:39:54,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 17:39:54,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 17:39:54,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 17:39:54,694 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 17:39:54,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... [2018-11-18 17:39:54,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 17:39:54,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 17:39:54,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 17:39:54,707 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 17:39:54,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/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 17:39:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 17:39:54,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 17:39:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 17:39:54,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 17:39:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 17:39:54,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 17:39:54,898 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 17:39:54,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:39:54 BoogieIcfgContainer [2018-11-18 17:39:54,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 17:39:54,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 17:39:54,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 17:39:54,902 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 17:39:54,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 05:39:54" (1/3) ... [2018-11-18 17:39:54,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f442984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:39:54, skipping insertion in model container [2018-11-18 17:39:54,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:39:54" (2/3) ... [2018-11-18 17:39:54,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f442984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:39:54, skipping insertion in model container [2018-11-18 17:39:54,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:39:54" (3/3) ... [2018-11-18 17:39:54,905 INFO L112 eAbstractionObserver]: Analyzing ICFG BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-11-18 17:39:54,913 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 17:39:54,920 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-18 17:39:54,933 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-18 17:39:54,959 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 17:39:54,960 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 17:39:54,960 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 17:39:54,960 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 17:39:54,960 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 17:39:54,960 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 17:39:54,960 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 17:39:54,960 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 17:39:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-11-18 17:39:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 17:39:54,980 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:39:54,980 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:39:54,982 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:39:54,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:54,987 INFO L82 PathProgramCache]: Analyzing trace with hash 409964900, now seen corresponding path program 1 times [2018-11-18 17:39:54,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:39:55,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:55,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:55,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:55,035 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:39:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:55,122 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 17:39:55,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:39:55,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 17:39:55,124 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:39:55,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:39:55,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:39:55,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:39:55,136 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2018-11-18 17:39:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:39:55,232 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2018-11-18 17:39:55,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:39:55,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-18 17:39:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:39:55,241 INFO L225 Difference]: With dead ends: 49 [2018-11-18 17:39:55,241 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 17:39:55,244 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 17:39:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 17:39:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-11-18 17:39:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 17:39:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-11-18 17:39:55,270 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2018-11-18 17:39:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:39:55,271 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-11-18 17:39:55,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:39:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-11-18 17:39:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 17:39:55,272 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:39:55,272 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:39:55,272 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:39:55,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash 409965092, now seen corresponding path program 1 times [2018-11-18 17:39:55,272 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:39:55,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:55,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:55,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:55,274 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:39:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:55,327 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 17:39:55,327 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:39:55,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 17:39:55,327 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:39:55,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 17:39:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 17:39:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 17:39:55,328 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2018-11-18 17:39:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:39:55,396 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-11-18 17:39:55,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:39:55,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-18 17:39:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:39:55,397 INFO L225 Difference]: With dead ends: 32 [2018-11-18 17:39:55,397 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 17:39:55,398 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 17:39:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 17:39:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2018-11-18 17:39:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 17:39:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-11-18 17:39:55,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2018-11-18 17:39:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:39:55,402 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-11-18 17:39:55,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 17:39:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-11-18 17:39:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 17:39:55,402 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:39:55,402 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:39:55,402 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:39:55,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash -246154182, now seen corresponding path program 1 times [2018-11-18 17:39:55,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:39:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:55,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:55,404 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:39:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:55,439 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 17:39:55,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:55,439 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:39:55,440 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 17:39:55,442 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [21], [22], [24], [40], [41], [42] [2018-11-18 17:39:55,463 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:39:55,463 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:39:55,544 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 17:39:55,545 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 17:39:55,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:55,549 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 17:39:55,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:55,550 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/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 17:39:55,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:55,556 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:39:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:55,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:39:55,618 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 17:39:55,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:39:55,657 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 17:39:55,672 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:39:55,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2018-11-18 17:39:55,672 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:39:55,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:39:55,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:39:55,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:39:55,673 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2018-11-18 17:39:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:39:55,711 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-11-18 17:39:55,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:39:55,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 17:39:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:39:55,712 INFO L225 Difference]: With dead ends: 40 [2018-11-18 17:39:55,712 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 17:39:55,713 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:39:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 17:39:55,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-11-18 17:39:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 17:39:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-11-18 17:39:55,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2018-11-18 17:39:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:39:55,717 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-11-18 17:39:55,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:39:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-11-18 17:39:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 17:39:55,717 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:39:55,717 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:39:55,718 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:39:55,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -246153990, now seen corresponding path program 1 times [2018-11-18 17:39:55,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:39:55,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:55,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:55,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:55,720 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:39:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:55,759 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 17:39:55,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:55,759 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:39:55,759 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 17:39:55,760 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [22], [24], [26], [27], [40], [41], [42] [2018-11-18 17:39:55,761 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:39:55,761 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:39:55,771 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 17:39:55,772 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 17:39:55,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:55,773 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 17:39:55,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:55,773 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/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 17:39:55,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:55,779 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:39:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:55,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:39:55,843 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 17:39:55,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:39:55,888 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 17:39:55,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:39:55,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-11-18 17:39:55,904 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:39:55,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 17:39:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 17:39:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:39:55,905 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2018-11-18 17:39:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:39:56,033 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2018-11-18 17:39:56,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:39:56,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-11-18 17:39:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:39:56,034 INFO L225 Difference]: With dead ends: 60 [2018-11-18 17:39:56,034 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 17:39:56,035 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 17:39:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 17:39:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-11-18 17:39:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 17:39:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2018-11-18 17:39:56,039 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2018-11-18 17:39:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:39:56,040 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2018-11-18 17:39:56,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 17:39:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2018-11-18 17:39:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 17:39:56,040 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:39:56,040 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:39:56,040 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:39:56,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 961216640, now seen corresponding path program 1 times [2018-11-18 17:39:56,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:39:56,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:56,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:56,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:56,044 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:39:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:56,095 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 17:39:56,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:56,095 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:39:56,095 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 17:39:56,095 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [21], [26], [28], [30], [40], [41], [42] [2018-11-18 17:39:56,096 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:39:56,096 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:39:56,106 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 17:39:56,106 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 17:39:56,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:56,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 17:39:56,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:56,108 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/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 17:39:56,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:56,114 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:39:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:56,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:39:56,147 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 17:39:56,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:39:56,168 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 17:39:56,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:39:56,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2018-11-18 17:39:56,184 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:39:56,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:39:56,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:39:56,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-18 17:39:56,185 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2018-11-18 17:39:56,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:39:56,209 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2018-11-18 17:39:56,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:39:56,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 17:39:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:39:56,211 INFO L225 Difference]: With dead ends: 42 [2018-11-18 17:39:56,211 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 17:39:56,211 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 17:39:56,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 17:39:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2018-11-18 17:39:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 17:39:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-11-18 17:39:56,215 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2018-11-18 17:39:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:39:56,216 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-11-18 17:39:56,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:39:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-11-18 17:39:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 17:39:56,216 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:39:56,216 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:39:56,217 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:39:56,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash 961216832, now seen corresponding path program 1 times [2018-11-18 17:39:56,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:39:56,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:56,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:56,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:56,218 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:39:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:56,250 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 17:39:56,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:56,250 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:39:56,250 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 17:39:56,251 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [26], [27], [28], [30], [40], [41], [42] [2018-11-18 17:39:56,251 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:39:56,251 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:39:56,258 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 17:39:56,258 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 17:39:56,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:56,263 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 17:39:56,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:56,263 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/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 17:39:56,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:56,279 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:39:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:56,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:39:56,310 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 17:39:56,310 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:39:56,341 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 17:39:56,356 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:39:56,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2018-11-18 17:39:56,356 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:39:56,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:39:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:39:56,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:39:56,357 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2018-11-18 17:39:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:39:56,388 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2018-11-18 17:39:56,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:39:56,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 17:39:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:39:56,389 INFO L225 Difference]: With dead ends: 55 [2018-11-18 17:39:56,389 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 17:39:56,390 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:39:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 17:39:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2018-11-18 17:39:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 17:39:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-11-18 17:39:56,393 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2018-11-18 17:39:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:39:56,394 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-11-18 17:39:56,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:39:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-11-18 17:39:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 17:39:56,394 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:39:56,395 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:39:56,395 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 17:39:56,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash -757382272, now seen corresponding path program 1 times [2018-11-18 17:39:56,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:39:56,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:56,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:56,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:39:56,396 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:39:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 17:39:56,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:56,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:39:56,456 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-11-18 17:39:56,456 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [11], [17], [20], [22], [24], [26], [27], [28], [30], [40], [41], [42] [2018-11-18 17:39:56,456 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:39:56,457 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:39:56,465 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 17:39:56,466 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 17:39:56,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:39:56,467 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 17:39:56,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:39:56,467 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/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 17:39:56,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:39:56,473 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:39:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:39:56,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:39:56,514 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 17:39:56,514 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:39:56,582 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 17:39:56,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:39:56,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2018-11-18 17:39:56,597 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:39:56,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 17:39:56,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 17:39:56,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-18 17:39:56,598 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2018-11-18 17:39:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:39:56,783 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2018-11-18 17:39:56,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 17:39:56,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2018-11-18 17:39:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:39:56,783 INFO L225 Difference]: With dead ends: 53 [2018-11-18 17:39:56,784 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 17:39:56,784 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2018-11-18 17:39:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 17:39:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 17:39:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 17:39:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 17:39:56,785 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-11-18 17:39:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:39:56,785 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 17:39:56,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 17:39:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 17:39:56,785 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 17:39:56,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 17:39:56,804 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:39:56,814 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:39:56,870 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 17:39:56,870 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:39:56,871 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:39:56,871 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 17:39:56,871 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 17:39:56,871 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 17:39:56,871 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 14 28) no Hoare annotation was computed. [2018-11-18 17:39:56,871 INFO L425 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-11-18 17:39:56,871 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-18 17:39:56,871 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-11-18 17:39:56,872 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-18 17:39:56,872 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 25) no Hoare annotation was computed. [2018-11-18 17:39:56,872 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 14 28) no Hoare annotation was computed. [2018-11-18 17:39:56,872 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-11-18 17:39:56,872 INFO L425 ceAbstractionStarter]: For program point mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-11-18 17:39:56,872 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 14 28) the Hoare annotation is: true [2018-11-18 17:39:56,872 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-18 17:39:56,872 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 26) no Hoare annotation was computed. [2018-11-18 17:39:56,873 INFO L421 ceAbstractionStarter]: At program point L20-2(lines 19 25) the Hoare annotation is: (and (<= 1 main_~y1~0) (<= 0 main_~y2~0) (<= main_~y2~0 2147483647) (<= main_~y1~0 2147483647)) [2018-11-18 17:39:56,873 INFO L425 ceAbstractionStarter]: For program point L18-1(lines 18 26) no Hoare annotation was computed. [2018-11-18 17:39:56,873 INFO L425 ceAbstractionStarter]: For program point mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-11-18 17:39:56,873 INFO L425 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-11-18 17:39:56,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 05:39:56 BoogieIcfgContainer [2018-11-18 17:39:56,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 17:39:56,881 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 17:39:56,881 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 17:39:56,882 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 17:39:56,882 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:39:54" (3/4) ... [2018-11-18 17:39:56,884 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 17:39:56,888 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 17:39:56,888 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 17:39:56,890 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-18 17:39:56,890 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 17:39:56,891 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 17:39:56,919 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_15e051f0-8520-4243-a78d-992ba732e13a/bin-2019/utaipan/witness.graphml [2018-11-18 17:39:56,919 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 17:39:56,919 INFO L168 Benchmark]: Toolchain (without parser) took 2384.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.5 MB). Free memory was 958.1 MB in the beginning and 861.3 MB in the end (delta: 96.7 MB). Peak memory consumption was 269.2 MB. Max. memory is 11.5 GB. [2018-11-18 17:39:56,920 INFO L168 Benchmark]: CDTParser took 0.11 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 17:39:56,921 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.82 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 17:39:56,921 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.36 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:39:56,921 INFO L168 Benchmark]: Boogie Preprocessor took 12.84 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 17:39:56,922 INFO L168 Benchmark]: RCFGBuilder took 192.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.5 MB). Free memory was 944.6 MB in the beginning and 1.2 GB in the end (delta: -210.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 17:39:56,922 INFO L168 Benchmark]: TraceAbstraction took 1981.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 864.6 MB in the end (delta: 290.5 MB). Peak memory consumption was 290.5 MB. Max. memory is 11.5 GB. [2018-11-18 17:39:56,922 INFO L168 Benchmark]: Witness Printer took 37.68 ms. Allocated memory is still 1.2 GB. Free memory was 864.6 MB in the beginning and 861.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-18 17:39:56,924 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 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 143.82 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 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 13.36 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.84 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 192.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.5 MB). Free memory was 944.6 MB in the beginning and 1.2 GB in the end (delta: -210.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1981.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 864.6 MB in the end (delta: 290.5 MB). Peak memory consumption was 290.5 MB. Max. memory is 11.5 GB. * Witness Printer took 37.68 ms. Allocated memory is still 1.2 GB. Free memory was 864.6 MB in the beginning and 861.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 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: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: 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: 19]: Loop Invariant Derived loop invariant: ((1 <= y1 && 0 <= y2) && y2 <= 2147483647) && y1 <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 4 error locations. SAFE Result, 1.9s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 59 SDtfs, 171 SDslu, 126 SDs, 0 SdLazy, 349 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 218 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s 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, 89 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 12 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 346 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 239 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 258 ConstructedInterpolants, 17 QuantifiedInterpolants, 21690 SizeOfPredicates, 10 NumberOfNonLiveVariables, 169 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 35/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...