./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5_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_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/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 457415f9b28998cf0ba7f80d69eaf14873f5a98f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 15:02:38,118 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:02:38,119 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:02:38,126 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:02:38,127 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:02:38,127 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:02:38,128 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:02:38,130 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:02:38,132 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:02:38,132 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:02:38,133 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:02:38,134 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:02:38,134 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:02:38,135 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:02:38,136 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:02:38,137 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:02:38,138 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:02:38,140 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:02:38,141 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:02:38,143 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:02:38,143 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:02:38,144 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:02:38,147 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:02:38,147 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:02:38,147 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:02:38,148 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:02:38,149 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:02:38,150 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:02:38,150 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:02:38,151 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:02:38,151 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:02:38,152 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:02:38,152 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:02:38,152 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:02:38,153 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:02:38,153 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:02:38,154 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-18 15:02:38,164 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:02:38,164 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:02:38,165 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:02:38,165 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 15:02:38,166 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 15:02:38,166 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 15:02:38,166 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 15:02:38,166 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 15:02:38,166 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 15:02:38,166 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 15:02:38,166 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 15:02:38,167 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 15:02:38,167 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 15:02:38,167 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:02:38,167 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 15:02:38,168 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:02:38,168 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:02:38,168 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:02:38,168 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:02:38,168 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:02:38,168 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 15:02:38,168 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:02:38,169 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:02:38,169 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:02:38,170 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:02:38,170 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:02:38,170 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:02:38,171 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:02:38,171 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:02:38,171 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:02:38,171 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:02:38,171 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:02:38,171 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 15:02:38,171 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:02:38,172 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:02:38,172 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 15:02:38,172 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_a48277d6-c254-4cc2-a8bc-202c2a0c168b/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 -> 457415f9b28998cf0ba7f80d69eaf14873f5a98f [2018-11-18 15:02:38,200 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:02:38,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:02:38,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:02:38,215 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:02:38,215 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:02:38,216 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5_true-termination_true-no-overflow.c [2018-11-18 15:02:38,259 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/data/a403bb35e/4bd3ffc7745147e0b5edbea28f226361/FLAGf8342c910 [2018-11-18 15:02:38,650 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:02:38,651 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5_true-termination_true-no-overflow.c [2018-11-18 15:02:38,657 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/data/a403bb35e/4bd3ffc7745147e0b5edbea28f226361/FLAGf8342c910 [2018-11-18 15:02:39,049 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/data/a403bb35e/4bd3ffc7745147e0b5edbea28f226361 [2018-11-18 15:02:39,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:02:39,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:02:39,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:02:39,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:02:39,058 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:02:39,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8be4c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39, skipping insertion in model container [2018-11-18 15:02:39,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:02:39,085 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:02:39,224 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:02:39,227 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:02:39,241 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:02:39,253 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:02:39,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39 WrapperNode [2018-11-18 15:02:39,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:02:39,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 15:02:39,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 15:02:39,254 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 15:02:39,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 15:02:39,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:02:39,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:02:39,268 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:02:39,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... [2018-11-18 15:02:39,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:02:39,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:02:39,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:02:39,283 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:02:39,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/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 15:02:39,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:02:39,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:02:39,381 INFO L130 BoogieDeclarations]: Found specification of procedure f [2018-11-18 15:02:39,381 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2018-11-18 15:02:39,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:02:39,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:02:39,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:02:39,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:02:39,538 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:02:39,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:02:39 BoogieIcfgContainer [2018-11-18 15:02:39,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:02:39,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:02:39,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:02:39,543 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:02:39,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:02:39" (1/3) ... [2018-11-18 15:02:39,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df50a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:02:39, skipping insertion in model container [2018-11-18 15:02:39,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:02:39" (2/3) ... [2018-11-18 15:02:39,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df50a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:02:39, skipping insertion in model container [2018-11-18 15:02:39,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:02:39" (3/3) ... [2018-11-18 15:02:39,546 INFO L112 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5_true-termination_true-no-overflow.c [2018-11-18 15:02:39,552 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:02:39,558 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-18 15:02:39,568 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-18 15:02:39,591 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:02:39,591 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:02:39,592 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:02:39,592 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:02:39,592 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:02:39,592 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:02:39,592 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:02:39,592 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:02:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-11-18 15:02:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 15:02:39,610 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:39,611 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:39,613 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:39,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:39,618 INFO L82 PathProgramCache]: Analyzing trace with hash 968375894, now seen corresponding path program 1 times [2018-11-18 15:02:39,620 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:39,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:39,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:39,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:39,654 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:39,771 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 15:02:39,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:02:39,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:02:39,773 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:02:39,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:02:39,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:02:39,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:02:39,792 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2018-11-18 15:02:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:39,945 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2018-11-18 15:02:39,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:02:39,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-18 15:02:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:39,955 INFO L225 Difference]: With dead ends: 49 [2018-11-18 15:02:39,955 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 15:02:39,958 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:02:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 15:02:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2018-11-18 15:02:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 15:02:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-11-18 15:02:39,991 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2018-11-18 15:02:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:39,992 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-11-18 15:02:39,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:02:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-11-18 15:02:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 15:02:39,993 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:39,993 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:39,993 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:39,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:39,994 INFO L82 PathProgramCache]: Analyzing trace with hash 968376118, now seen corresponding path program 1 times [2018-11-18 15:02:39,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:39,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:39,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:39,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:39,996 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:40,070 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 15:02:40,070 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:02:40,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:02:40,070 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:02:40,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:02:40,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:02:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:02:40,072 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2018-11-18 15:02:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:40,270 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2018-11-18 15:02:40,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:02:40,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-18 15:02:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:40,272 INFO L225 Difference]: With dead ends: 38 [2018-11-18 15:02:40,272 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 15:02:40,272 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:02:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 15:02:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-11-18 15:02:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 15:02:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-11-18 15:02:40,277 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2018-11-18 15:02:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:40,277 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-11-18 15:02:40,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:02:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-11-18 15:02:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 15:02:40,278 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:40,278 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:40,278 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:40,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash -45118316, now seen corresponding path program 1 times [2018-11-18 15:02:40,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:40,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:40,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:40,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:40,280 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:40,329 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 15:02:40,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:02:40,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:02:40,329 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:02:40,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:02:40,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:02:40,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:02:40,330 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-11-18 15:02:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:40,400 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-11-18 15:02:40,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:02:40,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-11-18 15:02:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:40,401 INFO L225 Difference]: With dead ends: 37 [2018-11-18 15:02:40,402 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 15:02:40,402 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:02:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 15:02:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2018-11-18 15:02:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 15:02:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-11-18 15:02:40,408 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 12 [2018-11-18 15:02:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:40,408 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-11-18 15:02:40,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:02:40,409 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-11-18 15:02:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 15:02:40,410 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:40,411 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:40,411 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:40,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:40,411 INFO L82 PathProgramCache]: Analyzing trace with hash -45111365, now seen corresponding path program 1 times [2018-11-18 15:02:40,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:40,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:40,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:40,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:40,413 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:40,469 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 15:02:40,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:02:40,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:02:40,470 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:02:40,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:02:40,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:02:40,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:02:40,470 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2018-11-18 15:02:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:40,522 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-18 15:02:40,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:02:40,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-11-18 15:02:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:40,525 INFO L225 Difference]: With dead ends: 36 [2018-11-18 15:02:40,526 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 15:02:40,526 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:02:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 15:02:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-11-18 15:02:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 15:02:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-11-18 15:02:40,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 12 [2018-11-18 15:02:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:40,532 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-11-18 15:02:40,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:02:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-11-18 15:02:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 15:02:40,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:40,533 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:40,534 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:40,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:40,534 INFO L82 PathProgramCache]: Analyzing trace with hash -489425099, now seen corresponding path program 1 times [2018-11-18 15:02:40,534 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:40,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:40,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:40,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:40,535 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:40,597 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 15:02:40,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:02:40,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 15:02:40,598 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:02:40,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:02:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:02:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:02:40,599 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2018-11-18 15:02:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:40,667 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-11-18 15:02:40,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:02:40,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 15:02:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:40,669 INFO L225 Difference]: With dead ends: 47 [2018-11-18 15:02:40,669 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 15:02:40,669 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-11-18 15:02:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 15:02:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2018-11-18 15:02:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 15:02:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2018-11-18 15:02:40,675 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 17 [2018-11-18 15:02:40,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:40,675 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2018-11-18 15:02:40,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:02:40,675 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2018-11-18 15:02:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 15:02:40,675 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:40,675 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:40,676 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:40,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:40,676 INFO L82 PathProgramCache]: Analyzing trace with hash 945154704, now seen corresponding path program 1 times [2018-11-18 15:02:40,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:40,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:40,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:40,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:40,677 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:40,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:40,716 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:40,717 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-18 15:02:40,718 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [8], [9], [15], [17], [19], [26], [29], [39], [41], [42], [43], [45] [2018-11-18 15:02:40,744 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:02:40,744 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:02:40,853 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:02:40,854 INFO L272 AbstractInterpreter]: Visited 15 different actions 36 times. Never merged. Never widened. Performed 91 root evaluator evaluations with a maximum evaluation depth of 3. Performed 91 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 15:02:40,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:40,861 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:02:40,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:40,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/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 15:02:40,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:40,869 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:02:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:40,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:40,962 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 15:02:40,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:41,016 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 15:02:41,034 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:02:41,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 11 [2018-11-18 15:02:41,035 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:02:41,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:02:41,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:02:41,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-11-18 15:02:41,036 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 5 states. [2018-11-18 15:02:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:41,153 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-11-18 15:02:41,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:02:41,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 15:02:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:41,155 INFO L225 Difference]: With dead ends: 42 [2018-11-18 15:02:41,155 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 15:02:41,155 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:02:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 15:02:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-11-18 15:02:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 15:02:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2018-11-18 15:02:41,160 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2018-11-18 15:02:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:41,160 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2018-11-18 15:02:41,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:02:41,160 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2018-11-18 15:02:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 15:02:41,161 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:41,161 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:41,161 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:41,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash 945154928, now seen corresponding path program 1 times [2018-11-18 15:02:41,162 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:41,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:41,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:41,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:41,163 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:41,232 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 15:02:41,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:41,233 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:41,233 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-18 15:02:41,233 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [15], [16], [17], [19], [26], [29], [39], [41], [42], [43], [45] [2018-11-18 15:02:41,241 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:02:41,241 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:02:41,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:02:41,267 INFO L272 AbstractInterpreter]: Visited 14 different actions 35 times. Never merged. Never widened. Performed 92 root evaluator evaluations with a maximum evaluation depth of 3. Performed 92 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 15:02:41,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:41,273 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:02:41,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:41,273 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/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 15:02:41,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:41,282 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:02:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:41,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:41,306 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 15:02:41,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:41,400 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 15:02:41,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:02:41,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-11-18 15:02:41,417 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:02:41,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 15:02:41,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 15:02:41,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:02:41,418 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 7 states. [2018-11-18 15:02:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:41,596 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2018-11-18 15:02:41,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:02:41,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-11-18 15:02:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:41,597 INFO L225 Difference]: With dead ends: 69 [2018-11-18 15:02:41,597 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 15:02:41,598 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2018-11-18 15:02:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 15:02:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2018-11-18 15:02:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 15:02:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2018-11-18 15:02:41,606 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 17 [2018-11-18 15:02:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:41,606 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2018-11-18 15:02:41,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 15:02:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2018-11-18 15:02:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 15:02:41,607 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:41,607 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:41,607 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:41,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:41,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2007684213, now seen corresponding path program 1 times [2018-11-18 15:02:41,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:41,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:41,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:41,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:41,609 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:41,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:41,633 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:41,633 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-11-18 15:02:41,634 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [11], [12], [26], [29], [37], [41], [42], [43], [45] [2018-11-18 15:02:41,635 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:02:41,635 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:02:41,657 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:02:41,657 INFO L272 AbstractInterpreter]: Visited 14 different actions 17 times. Never merged. Never widened. Performed 45 root evaluator evaluations with a maximum evaluation depth of 3. Performed 45 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 4 variables. [2018-11-18 15:02:41,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:41,688 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:02:41,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:41,689 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/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 15:02:41,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:41,702 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:02:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:41,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:41,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:41,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:02:41,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2018-11-18 15:02:41,894 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:02:41,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 15:02:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 15:02:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:02:41,895 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 10 states. [2018-11-18 15:02:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:42,093 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2018-11-18 15:02:42,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:02:42,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-11-18 15:02:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:42,098 INFO L225 Difference]: With dead ends: 68 [2018-11-18 15:02:42,098 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 15:02:42,099 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2018-11-18 15:02:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 15:02:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-11-18 15:02:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 15:02:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-11-18 15:02:42,107 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 18 [2018-11-18 15:02:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:42,107 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-11-18 15:02:42,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 15:02:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-11-18 15:02:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 15:02:42,108 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:42,108 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:42,109 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:42,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2007691164, now seen corresponding path program 1 times [2018-11-18 15:02:42,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:42,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:42,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:42,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:42,113 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:42,170 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 15:02:42,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:42,170 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:42,171 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-11-18 15:02:42,171 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [15], [17], [18], [26], [29], [37], [41], [42], [43], [45] [2018-11-18 15:02:42,172 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:02:42,172 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:02:42,196 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:02:42,196 INFO L272 AbstractInterpreter]: Visited 16 different actions 22 times. Never merged. Never widened. Performed 55 root evaluator evaluations with a maximum evaluation depth of 3. Performed 55 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 4 variables. [2018-11-18 15:02:42,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:42,199 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:02:42,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:42,199 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/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 15:02:42,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:42,209 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:02:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:42,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:42,277 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 15:02:42,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:42,304 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 15:02:42,323 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:02:42,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 9 [2018-11-18 15:02:42,323 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:02:42,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:02:42,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:02:42,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:02:42,324 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 5 states. [2018-11-18 15:02:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:42,405 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2018-11-18 15:02:42,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:02:42,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-11-18 15:02:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:42,406 INFO L225 Difference]: With dead ends: 42 [2018-11-18 15:02:42,406 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 15:02:42,406 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:02:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 15:02:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-11-18 15:02:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 15:02:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-11-18 15:02:42,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 18 [2018-11-18 15:02:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:42,412 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-11-18 15:02:42,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:02:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-11-18 15:02:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 15:02:42,413 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:42,413 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:42,413 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:42,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash -764968255, now seen corresponding path program 1 times [2018-11-18 15:02:42,413 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:42,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:42,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:42,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:42,414 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:42,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:42,448 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:42,448 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-11-18 15:02:42,448 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [15], [17], [18], [19], [26], [29], [39], [41], [42], [43], [45] [2018-11-18 15:02:42,449 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:02:42,449 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:02:42,473 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:02:42,474 INFO L272 AbstractInterpreter]: Visited 14 different actions 35 times. Never merged. Never widened. Performed 92 root evaluator evaluations with a maximum evaluation depth of 3. Performed 92 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 15:02:42,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:42,475 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:02:42,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:42,475 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/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 15:02:42,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:42,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:02:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:42,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:42,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:42,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:02:42,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-11-18 15:02:42,657 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:02:42,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 15:02:42,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 15:02:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:02:42,658 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 7 states. [2018-11-18 15:02:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:42,775 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-11-18 15:02:42,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 15:02:42,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-11-18 15:02:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:42,776 INFO L225 Difference]: With dead ends: 49 [2018-11-18 15:02:42,776 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 15:02:42,777 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-11-18 15:02:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 15:02:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-11-18 15:02:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 15:02:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2018-11-18 15:02:42,783 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 18 [2018-11-18 15:02:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:42,783 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2018-11-18 15:02:42,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 15:02:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2018-11-18 15:02:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 15:02:42,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:42,784 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:42,784 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:42,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:42,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1188297686, now seen corresponding path program 2 times [2018-11-18 15:02:42,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:42,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:42,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:42,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:42,785 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:42,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:42,835 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:42,835 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:02:42,835 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:02:42,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:42,836 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:02:42,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:02:42,843 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:02:42,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 15:02:42,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:02:42,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:42,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:43,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:02:43,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 17 [2018-11-18 15:02:43,035 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:02:43,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:02:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:02:43,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:02:43,036 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 12 states. [2018-11-18 15:02:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:43,494 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2018-11-18 15:02:43,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 15:02:43,495 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-11-18 15:02:43,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:43,495 INFO L225 Difference]: With dead ends: 82 [2018-11-18 15:02:43,495 INFO L226 Difference]: Without dead ends: 81 [2018-11-18 15:02:43,496 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2018-11-18 15:02:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-18 15:02:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 28. [2018-11-18 15:02:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 15:02:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-11-18 15:02:43,503 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-11-18 15:02:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:43,503 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-18 15:02:43,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:02:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-11-18 15:02:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 15:02:43,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:43,504 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:43,504 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:43,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash 894148066, now seen corresponding path program 1 times [2018-11-18 15:02:43,507 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:43,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:43,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:02:43,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:43,509 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:43,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:43,570 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:43,570 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-11-18 15:02:43,571 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [8], [10], [12], [15], [17], [18], [19], [26], [29], [37], [39], [41], [42], [43], [45] [2018-11-18 15:02:43,571 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:02:43,572 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:02:43,606 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:02:43,606 INFO L272 AbstractInterpreter]: Visited 18 different actions 74 times. Never merged. Never widened. Performed 181 root evaluator evaluations with a maximum evaluation depth of 3. Performed 181 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 15:02:43,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:43,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:02:43,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:43,609 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:02:43,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:43,617 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:02:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:43,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:43,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:43,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:02:43,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-11-18 15:02:43,725 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:02:43,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 15:02:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 15:02:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:02:43,726 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2018-11-18 15:02:43,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:43,817 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-11-18 15:02:43,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 15:02:43,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-11-18 15:02:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:43,818 INFO L225 Difference]: With dead ends: 41 [2018-11-18 15:02:43,818 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 15:02:43,818 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-11-18 15:02:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 15:02:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2018-11-18 15:02:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 15:02:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-11-18 15:02:43,822 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 24 [2018-11-18 15:02:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:43,823 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-11-18 15:02:43,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 15:02:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-11-18 15:02:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 15:02:43,823 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:43,823 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:43,824 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:43,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1817477447, now seen corresponding path program 2 times [2018-11-18 15:02:43,824 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:43,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:02:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:43,825 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:43,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:43,929 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:43,929 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:02:43,929 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:02:43,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:43,929 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:02:43,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:02:43,937 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:02:43,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 15:02:43,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:02:43,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:43,951 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:44,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:02:44,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-11-18 15:02:44,504 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:02:44,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 15:02:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 15:02:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:02:44,504 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2018-11-18 15:02:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:44,958 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-11-18 15:02:44,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 15:02:44,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-11-18 15:02:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:44,959 INFO L225 Difference]: With dead ends: 47 [2018-11-18 15:02:44,959 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 15:02:44,960 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-11-18 15:02:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 15:02:44,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2018-11-18 15:02:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 15:02:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-11-18 15:02:44,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 24 [2018-11-18 15:02:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:44,968 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-11-18 15:02:44,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 15:02:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-11-18 15:02:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-18 15:02:44,969 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:44,969 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:44,969 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:44,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:44,970 INFO L82 PathProgramCache]: Analyzing trace with hash 774242216, now seen corresponding path program 2 times [2018-11-18 15:02:44,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:44,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:44,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:02:44,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:44,971 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:45,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:45,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:45,542 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:02:45,542 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:02:45,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:45,543 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:02:45,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:02:45,553 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:02:45,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 15:02:45,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:02:45,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 15:02:46,049 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:46,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:02:46,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2018-11-18 15:02:46,502 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:02:46,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 15:02:46,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:02:46,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2018-11-18 15:02:46,503 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 14 states. [2018-11-18 15:02:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:46,682 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2018-11-18 15:02:46,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 15:02:46,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2018-11-18 15:02:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:46,683 INFO L225 Difference]: With dead ends: 58 [2018-11-18 15:02:46,683 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 15:02:46,684 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2018-11-18 15:02:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 15:02:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-18 15:02:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 15:02:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-11-18 15:02:46,691 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 30 [2018-11-18 15:02:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:46,691 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-11-18 15:02:46,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 15:02:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-11-18 15:02:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 15:02:46,691 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:02:46,692 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:02:46,692 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 15:02:46,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:02:46,692 INFO L82 PathProgramCache]: Analyzing trace with hash -175937325, now seen corresponding path program 3 times [2018-11-18 15:02:46,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:02:46,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:46,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:02:46,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:02:46,693 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:02:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:02:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:46,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:46,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:02:46,843 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:02:46,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:02:46,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:02:46,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:02:46,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:02:46,850 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 15:02:46,858 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:02:46,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:02:46,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:02:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:02:46,907 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:02:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:02:47,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:02:47,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 12] total 26 [2018-11-18 15:02:47,178 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:02:47,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 15:02:47,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 15:02:47,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2018-11-18 15:02:47,179 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2018-11-18 15:02:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:02:47,225 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-11-18 15:02:47,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 15:02:47,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2018-11-18 15:02:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:02:47,226 INFO L225 Difference]: With dead ends: 37 [2018-11-18 15:02:47,226 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 15:02:47,227 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2018-11-18 15:02:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 15:02:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 15:02:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 15:02:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 15:02:47,227 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2018-11-18 15:02:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:02:47,227 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:02:47,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 15:02:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:02:47,228 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 15:02:47,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 15:02:47,256 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,363 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,367 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,367 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,370 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,377 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,379 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,384 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,386 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,420 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,423 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,429 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,438 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,473 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,476 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,477 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,478 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,480 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,482 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,484 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,500 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,503 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,505 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,509 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,512 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,512 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,514 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,516 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,518 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,519 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,520 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,523 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,527 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,529 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,561 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,563 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,580 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,615 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,624 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,634 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,672 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,680 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,693 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,730 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:47,748 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 15:02:49,263 WARN L180 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 88 DAG size of output: 29 [2018-11-18 15:02:49,426 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2018-11-18 15:02:50,089 WARN L180 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 25 [2018-11-18 15:02:50,091 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 15:02:50,091 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:02:50,091 INFO L425 ceAbstractionStarter]: For program point fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 15:02:50,091 INFO L425 ceAbstractionStarter]: For program point fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 15:02:50,091 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-18 15:02:50,091 INFO L425 ceAbstractionStarter]: For program point fFINAL(lines 13 23) no Hoare annotation was computed. [2018-11-18 15:02:50,091 INFO L425 ceAbstractionStarter]: For program point fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2018-11-18 15:02:50,091 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-18 15:02:50,091 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-11-18 15:02:50,091 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (or (and (and (not (= 0 f_~y)) (<= f_~x 2147483647) (<= f_~y 2147483647)) (<= 0 f_~x) (not (= 0 f_~x)) (<= 0 f_~y)) (< |f_#in~y| 0) (< 2147483647 |f_#in~y|) (< |f_#in~x| 0) (< 2147483647 |f_#in~x|)) [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2018-11-18 15:02:50,092 INFO L421 ceAbstractionStarter]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (< |f_#in~y| 0)) (.cse2 (< 2147483647 |f_#in~y|)) (.cse1 (< |f_#in~x| 0)) (.cse3 (< 2147483647 |f_#in~x|))) (and (or .cse0 .cse1 (or (= 0 |f_#in~x|) (or .cse2 .cse3))) (or (and (not (= 0 f_~y)) (and (<= 0 f_~x) (<= f_~y 2147483647)) (<= f_~x 2147483646) (<= 0 f_~y)) .cse0 .cse2 .cse1 .cse3))) [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point L18-3(line 18) no Hoare annotation was computed. [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 22) no Hoare annotation was computed. [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point fEXIT(lines 13 23) no Hoare annotation was computed. [2018-11-18 15:02:50,092 INFO L428 ceAbstractionStarter]: At program point fENTRY(lines 13 23) the Hoare annotation is: true [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:02:50,092 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 15:02:50,092 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 15:02:50,092 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 15:02:50,093 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 32) the Hoare annotation is: true [2018-11-18 15:02:50,093 INFO L421 ceAbstractionStarter]: At program point L29(line 29) the Hoare annotation is: (and (<= main_~x~0 2147483647) (<= main_~y~0 2147483647) (<= 0 main_~y~0) (<= 0 main_~x~0)) [2018-11-18 15:02:50,093 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 32) no Hoare annotation was computed. [2018-11-18 15:02:50,093 INFO L425 ceAbstractionStarter]: For program point L28(lines 28 30) no Hoare annotation was computed. [2018-11-18 15:02:50,093 INFO L425 ceAbstractionStarter]: For program point L29-1(line 29) no Hoare annotation was computed. [2018-11-18 15:02:50,093 INFO L425 ceAbstractionStarter]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2018-11-18 15:02:50,093 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 32) no Hoare annotation was computed. [2018-11-18 15:02:50,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:02:50 BoogieIcfgContainer [2018-11-18 15:02:50,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:02:50,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:02:50,096 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:02:50,096 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:02:50,096 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:02:39" (3/4) ... [2018-11-18 15:02:50,099 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 15:02:50,104 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 15:02:50,104 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2018-11-18 15:02:50,105 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 15:02:50,108 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-11-18 15:02:50,108 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 15:02:50,109 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 15:02:50,150 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a48277d6-c254-4cc2-a8bc-202c2a0c168b/bin-2019/utaipan/witness.graphml [2018-11-18 15:02:50,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:02:50,151 INFO L168 Benchmark]: Toolchain (without parser) took 11098.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.6 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -136.8 MB). Peak memory consumption was 48.8 MB. Max. memory is 11.5 GB. [2018-11-18 15:02:50,152 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:02:50,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.13 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-18 15:02:50,152 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.62 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 15:02:50,152 INFO L168 Benchmark]: Boogie Preprocessor took 14.51 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 15:02:50,153 INFO L168 Benchmark]: RCFGBuilder took 256.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -180.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:02:50,156 INFO L168 Benchmark]: TraceAbstraction took 10555.40 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 46.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 295.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:02:50,156 INFO L168 Benchmark]: Witness Printer took 54.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 11.5 GB. [2018-11-18 15:02:50,158 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 199.13 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.62 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 14.51 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 256.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -180.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10555.40 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 46.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.1 MB). Peak memory consumption was 295.7 MB. Max. memory is 11.5 GB. * Witness Printer took 54.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 4 error locations. SAFE Result, 10.5s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 2.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 260 SDtfs, 402 SDslu, 799 SDs, 0 SdLazy, 898 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 607 GetRequests, 382 SyntacticMatches, 5 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 141 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 41 PreInvPairs, 41 NumberOfFragments, 115 HoareAnnotationTreeSize, 41 FomulaSimplifications, 87478 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 11563 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 513 NumberOfCodeBlocks, 513 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 703 ConstructedInterpolants, 0 QuantifiedInterpolants, 51440 SizeOfPredicates, 35 NumberOfNonLiveVariables, 595 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 57/429 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...