./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/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 85017c4a5a64f245bd703090448e8d5785d54b75 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 22:51:43,550 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 22:51:43,551 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 22:51:43,557 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 22:51:43,557 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 22:51:43,558 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 22:51:43,559 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 22:51:43,560 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 22:51:43,561 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 22:51:43,562 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 22:51:43,562 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 22:51:43,562 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 22:51:43,563 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 22:51:43,564 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 22:51:43,564 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 22:51:43,565 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 22:51:43,565 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 22:51:43,567 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 22:51:43,568 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 22:51:43,569 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 22:51:43,570 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 22:51:43,571 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 22:51:43,572 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 22:51:43,573 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 22:51:43,573 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 22:51:43,573 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 22:51:43,574 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 22:51:43,575 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 22:51:43,575 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 22:51:43,576 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 22:51:43,576 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 22:51:43,577 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 22:51:43,577 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 22:51:43,577 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 22:51:43,578 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 22:51:43,578 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 22:51:43,578 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-22 22:51:43,588 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 22:51:43,589 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 22:51:43,589 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 22:51:43,589 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 22:51:43,590 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-22 22:51:43,590 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-22 22:51:43,590 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-22 22:51:43,590 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-22 22:51:43,590 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-22 22:51:43,590 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-22 22:51:43,590 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-22 22:51:43,590 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-22 22:51:43,590 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-22 22:51:43,591 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 22:51:43,591 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-22 22:51:43,591 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 22:51:43,591 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 22:51:43,592 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 22:51:43,592 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 22:51:43,592 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 22:51:43,592 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-22 22:51:43,592 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 22:51:43,592 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 22:51:43,592 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 22:51:43,592 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 22:51:43,593 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 22:51:43,593 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 22:51:43,593 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 22:51:43,593 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 22:51:43,593 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 22:51:43,593 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 22:51:43,593 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 22:51:43,594 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-22 22:51:43,594 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 22:51:43,594 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 22:51:43,594 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-22 22:51:43,594 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_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/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 -> 85017c4a5a64f245bd703090448e8d5785d54b75 [2018-11-22 22:51:43,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 22:51:43,624 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 22:51:43,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 22:51:43,627 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 22:51:43,627 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 22:51:43,628 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction_true-termination_true-no-overflow.c [2018-11-22 22:51:43,664 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/data/59e42cc8d/68b9fd5686df432f8c13efb39fb916ca/FLAG5083f5554 [2018-11-22 22:51:44,084 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 22:51:44,084 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction_true-termination_true-no-overflow.c [2018-11-22 22:51:44,089 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/data/59e42cc8d/68b9fd5686df432f8c13efb39fb916ca/FLAG5083f5554 [2018-11-22 22:51:44,100 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/data/59e42cc8d/68b9fd5686df432f8c13efb39fb916ca [2018-11-22 22:51:44,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 22:51:44,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 22:51:44,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 22:51:44,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 22:51:44,107 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 22:51:44,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e5f2ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44, skipping insertion in model container [2018-11-22 22:51:44,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 22:51:44,131 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 22:51:44,257 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:51:44,259 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 22:51:44,268 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:51:44,276 INFO L195 MainTranslator]: Completed translation [2018-11-22 22:51:44,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44 WrapperNode [2018-11-22 22:51:44,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 22:51:44,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 22:51:44,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 22:51:44,277 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 22:51:44,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 22:51:44,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 22:51:44,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 22:51:44,290 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 22:51:44,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... [2018-11-22 22:51:44,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 22:51:44,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 22:51:44,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 22:51:44,303 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 22:51:44,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/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 [2018-11-22 22:51:44,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 22:51:44,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 22:51:44,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 22:51:44,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 22:51:44,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 22:51:44,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 22:51:44,475 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 22:51:44,475 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-22 22:51:44,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:51:44 BoogieIcfgContainer [2018-11-22 22:51:44,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 22:51:44,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 22:51:44,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 22:51:44,478 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 22:51:44,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 10:51:44" (1/3) ... [2018-11-22 22:51:44,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc458ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:51:44, skipping insertion in model container [2018-11-22 22:51:44,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:51:44" (2/3) ... [2018-11-22 22:51:44,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc458ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 10:51:44, skipping insertion in model container [2018-11-22 22:51:44,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:51:44" (3/3) ... [2018-11-22 22:51:44,480 INFO L112 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Introduction_true-termination_true-no-overflow.c [2018-11-22 22:51:44,485 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 22:51:44,490 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-22 22:51:44,500 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-22 22:51:44,524 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 22:51:44,525 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 22:51:44,525 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 22:51:44,525 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 22:51:44,525 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 22:51:44,525 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 22:51:44,525 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 22:51:44,525 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 22:51:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-22 22:51:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-22 22:51:44,544 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:51:44,544 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:51:44,546 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 22:51:44,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash -37667266, now seen corresponding path program 1 times [2018-11-22 22:51:44,551 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 22:51:44,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:44,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:44,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:44,585 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 22:51:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:44,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:51:44,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-22 22:51:44,656 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 22:51:44,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-22 22:51:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-22 22:51:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 22:51:44,668 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-11-22 22:51:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:51:44,708 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-22 22:51:44,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-22 22:51:44,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-22 22:51:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:51:44,717 INFO L225 Difference]: With dead ends: 31 [2018-11-22 22:51:44,717 INFO L226 Difference]: Without dead ends: 17 [2018-11-22 22:51:44,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 22:51:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-22 22:51:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-11-22 22:51:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-22 22:51:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-22 22:51:44,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2018-11-22 22:51:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:51:44,747 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-22 22:51:44,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-22 22:51:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-22 22:51:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-22 22:51:44,748 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:51:44,748 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:51:44,749 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 22:51:44,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1167685199, now seen corresponding path program 1 times [2018-11-22 22:51:44,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 22:51:44,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:44,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:44,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:44,751 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 22:51:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:44,785 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:51:44,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-22 22:51:44,785 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 22:51:44,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-22 22:51:44,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-22 22:51:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-22 22:51:44,787 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2018-11-22 22:51:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:51:44,823 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-11-22 22:51:44,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 22:51:44,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-11-22 22:51:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:51:44,824 INFO L225 Difference]: With dead ends: 21 [2018-11-22 22:51:44,824 INFO L226 Difference]: Without dead ends: 19 [2018-11-22 22:51:44,824 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-22 22:51:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-22 22:51:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-11-22 22:51:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-22 22:51:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-22 22:51:44,827 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-11-22 22:51:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:51:44,827 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-22 22:51:44,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-22 22:51:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-22 22:51:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-22 22:51:44,828 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:51:44,828 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:51:44,828 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 22:51:44,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1159010413, now seen corresponding path program 1 times [2018-11-22 22:51:44,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 22:51:44,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:44,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:44,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:44,830 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 22:51:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:44,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:51:44,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-22 22:51:44,854 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 22:51:44,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-22 22:51:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-22 22:51:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 22:51:44,855 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-11-22 22:51:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:51:44,879 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-22 22:51:44,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-22 22:51:44,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-22 22:51:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:51:44,880 INFO L225 Difference]: With dead ends: 18 [2018-11-22 22:51:44,881 INFO L226 Difference]: Without dead ends: 17 [2018-11-22 22:51:44,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 22:51:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-22 22:51:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-22 22:51:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-22 22:51:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-22 22:51:44,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2018-11-22 22:51:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:51:44,884 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-22 22:51:44,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-22 22:51:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-22 22:51:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-22 22:51:44,884 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:51:44,884 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:51:44,885 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 22:51:44,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1412475851, now seen corresponding path program 1 times [2018-11-22 22:51:44,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 22:51:44,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:44,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:44,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:44,886 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 22:51:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:44,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:51:44,942 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 22:51:44,942 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2018-11-22 22:51:44,944 INFO L202 CegarAbsIntRunner]: [0], [4], [13], [14], [15], [17], [19], [21], [27], [28], [29] [2018-11-22 22:51:44,965 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 22:51:44,965 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 22:51:45,080 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 22:51:45,081 INFO L272 AbstractInterpreter]: Visited 11 different actions 29 times. Merged at 6 different actions 18 times. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 4. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-11-22 22:51:45,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:45,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 22:51:45,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:51:45,088 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/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 [2018-11-22 22:51:45,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:45,095 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 22:51:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:45,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:51:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 22:51:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,258 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:51:45,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2018-11-22 22:51:45,258 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 22:51:45,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 22:51:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:51:45,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:51:45,259 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2018-11-22 22:51:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:51:45,294 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-22 22:51:45,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 22:51:45,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-11-22 22:51:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:51:45,295 INFO L225 Difference]: With dead ends: 18 [2018-11-22 22:51:45,295 INFO L226 Difference]: Without dead ends: 17 [2018-11-22 22:51:45,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-11-22 22:51:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-22 22:51:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-11-22 22:51:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-22 22:51:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-22 22:51:45,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2018-11-22 22:51:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:51:45,298 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-22 22:51:45,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 22:51:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-22 22:51:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-22 22:51:45,299 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:51:45,299 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:51:45,299 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 22:51:45,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:45,300 INFO L82 PathProgramCache]: Analyzing trace with hash -837078374, now seen corresponding path program 1 times [2018-11-22 22:51:45,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 22:51:45,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:45,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:45,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:45,301 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 22:51:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:51:45,326 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 22:51:45,326 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-11-22 22:51:45,326 INFO L202 CegarAbsIntRunner]: [0], [4], [13], [15], [16], [17], [19], [21], [27], [28], [29] [2018-11-22 22:51:45,327 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 22:51:45,327 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 22:51:45,362 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 22:51:45,362 INFO L272 AbstractInterpreter]: Visited 11 different actions 29 times. Merged at 6 different actions 18 times. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 4. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-11-22 22:51:45,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:45,369 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 22:51:45,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:51:45,369 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/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 [2018-11-22 22:51:45,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:45,376 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 22:51:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:45,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:51:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 22:51:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,469 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-22 22:51:45,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 10 [2018-11-22 22:51:45,470 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 22:51:45,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 22:51:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:51:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:51:45,470 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-11-22 22:51:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:51:45,496 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-22 22:51:45,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 22:51:45,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-22 22:51:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:51:45,497 INFO L225 Difference]: With dead ends: 16 [2018-11-22 22:51:45,497 INFO L226 Difference]: Without dead ends: 15 [2018-11-22 22:51:45,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-22 22:51:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-22 22:51:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-22 22:51:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-22 22:51:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-22 22:51:45,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-11-22 22:51:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:51:45,501 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-22 22:51:45,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 22:51:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-22 22:51:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-22 22:51:45,502 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:51:45,502 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 22:51:45,502 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 22:51:45,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:45,502 INFO L82 PathProgramCache]: Analyzing trace with hash -179625769, now seen corresponding path program 1 times [2018-11-22 22:51:45,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 22:51:45,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:45,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:45,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:45,504 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 22:51:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:51:45,517 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 22:51:45,517 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-11-22 22:51:45,517 INFO L202 CegarAbsIntRunner]: [0], [4], [13], [15], [17], [18], [19], [21], [27], [28], [29] [2018-11-22 22:51:45,518 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 22:51:45,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 22:51:45,544 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 22:51:45,544 INFO L272 AbstractInterpreter]: Visited 11 different actions 29 times. Merged at 5 different actions 15 times. Never widened. Performed 101 root evaluator evaluations with a maximum evaluation depth of 4. Performed 101 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 3 variables. [2018-11-22 22:51:45,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:45,553 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 22:51:45,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:51:45,553 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/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 [2018-11-22 22:51:45,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:45,564 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 22:51:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:45,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:51:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 22:51:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 22:51:45,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-11-22 22:51:45,608 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 22:51:45,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-22 22:51:45,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-22 22:51:45,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:51:45,609 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-11-22 22:51:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:51:45,625 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-22 22:51:45,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-22 22:51:45,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-11-22 22:51:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:51:45,626 INFO L225 Difference]: With dead ends: 22 [2018-11-22 22:51:45,626 INFO L226 Difference]: Without dead ends: 21 [2018-11-22 22:51:45,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:51:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-22 22:51:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-11-22 22:51:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-22 22:51:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-22 22:51:45,630 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 14 [2018-11-22 22:51:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:51:45,630 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-22 22:51:45,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-22 22:51:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-22 22:51:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-22 22:51:45,631 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 22:51:45,631 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-22 22:51:45,631 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-22 22:51:45,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:51:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1368541440, now seen corresponding path program 2 times [2018-11-22 22:51:45,632 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 22:51:45,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:45,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:51:45,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:51:45,635 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 22:51:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:51:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:51:45,678 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 22:51:45,679 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 22:51:45,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 22:51:45,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:51:45,679 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/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 [2018-11-22 22:51:45,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:51:45,690 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 22:51:45,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-22 22:51:45,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:51:45,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:51:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 22:51:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:51:45,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 22:51:45,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2018-11-22 22:51:45,802 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 22:51:45,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-22 22:51:45,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 22:51:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-11-22 22:51:45,803 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2018-11-22 22:51:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:51:45,950 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-11-22 22:51:45,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 22:51:45,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-11-22 22:51:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 22:51:45,951 INFO L225 Difference]: With dead ends: 27 [2018-11-22 22:51:45,951 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 22:51:45,952 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2018-11-22 22:51:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 22:51:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 22:51:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 22:51:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 22:51:45,952 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-11-22 22:51:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 22:51:45,953 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 22:51:45,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-22 22:51:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 22:51:45,953 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 22:51:45,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-22 22:51:46,021 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-22 22:51:46,021 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-22 22:51:46,022 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-22 22:51:46,022 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-22 22:51:46,022 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-22 22:51:46,022 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-22 22:51:46,022 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 14 23) the Hoare annotation is: true [2018-11-22 22:51:46,022 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 14 23) no Hoare annotation was computed. [2018-11-22 22:51:46,023 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2018-11-22 22:51:46,023 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2018-11-22 22:51:46,023 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-22 22:51:46,023 INFO L448 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-11-22 22:51:46,023 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-22 22:51:46,023 INFO L448 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-11-22 22:51:46,023 INFO L444 ceAbstractionStarter]: At program point L18-2(lines 18 21) the Hoare annotation is: (let ((.cse0 (<= 2 main_~y~0))) (or (and (<= (+ main_~x~0 main_~y~0) 2147483647) (<= main_~y~0 2147483647) .cse0) (and (<= main_~x~0 2147483646) (<= main_~y~0 2) .cse0) (and (<= 1 main_~y~0) (<= main_~x~0 (+ main_~y~0 2147483646)) (<= main_~y~0 1)))) [2018-11-22 22:51:46,024 INFO L448 ceAbstractionStarter]: For program point L18-3(lines 18 21) no Hoare annotation was computed. [2018-11-22 22:51:46,024 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 14 23) no Hoare annotation was computed. [2018-11-22 22:51:46,024 INFO L448 ceAbstractionStarter]: For program point mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-22 22:51:46,024 INFO L448 ceAbstractionStarter]: For program point mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-22 22:51:46,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 10:51:46 BoogieIcfgContainer [2018-11-22 22:51:46,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 22:51:46,033 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 22:51:46,033 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 22:51:46,034 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 22:51:46,034 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:51:44" (3/4) ... [2018-11-22 22:51:46,036 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 22:51:46,040 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-22 22:51:46,040 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-22 22:51:46,044 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-22 22:51:46,044 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-22 22:51:46,044 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 22:51:46,072 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0a15fc10-9d0f-42dc-9294-6306f06f2e3c/bin-2019/utaipan/witness.graphml [2018-11-22 22:51:46,072 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 22:51:46,073 INFO L168 Benchmark]: Toolchain (without parser) took 1970.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 959.2 MB in the beginning and 924.9 MB in the end (delta: 34.4 MB). Peak memory consumption was 170.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:51:46,074 INFO L168 Benchmark]: CDTParser took 0.12 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. [2018-11-22 22:51:46,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.59 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:51:46,074 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.64 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:51:46,075 INFO L168 Benchmark]: Boogie Preprocessor took 12.67 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:51:46,075 INFO L168 Benchmark]: RCFGBuilder took 172.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-22 22:51:46,075 INFO L168 Benchmark]: TraceAbstraction took 1557.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 927.5 MB in the end (delta: 197.3 MB). Peak memory consumption was 197.3 MB. Max. memory is 11.5 GB. [2018-11-22 22:51:46,076 INFO L168 Benchmark]: Witness Printer took 39.05 ms. Allocated memory is still 1.2 GB. Free memory was 927.5 MB in the beginning and 924.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:51:46,078 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 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 172.59 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.64 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.67 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 172.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1557.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 927.5 MB in the end (delta: 197.3 MB). Peak memory consumption was 197.3 MB. Max. memory is 11.5 GB. * Witness Printer took 39.05 ms. Allocated memory is still 1.2 GB. Free memory was 927.5 MB in the beginning and 924.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 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: 19]: 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: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((x + y <= 2147483647 && y <= 2147483647) && 2 <= y) || ((x <= 2147483646 && y <= 2) && 2 <= y)) || ((1 <= y && x <= y + 2147483646) && y <= 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 4 error locations. SAFE Result, 1.5s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 48 SDslu, 76 SDs, 0 SdLazy, 148 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 9 NumberOfFragments, 39 HoareAnnotationTreeSize, 5 FomulaSimplifications, 42 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 141 NumberOfCodeBlocks, 141 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 7224 SizeOfPredicates, 7 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 8/66 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...