./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6c09c2a46ed7454ea61f3b2ddb99e3e2ba9fd4da ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 07:42:12,457 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 07:42:12,458 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 07:42:12,464 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 07:42:12,464 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 07:42:12,465 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 07:42:12,465 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 07:42:12,466 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 07:42:12,467 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 07:42:12,467 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 07:42:12,468 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 07:42:12,468 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 07:42:12,468 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 07:42:12,469 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 07:42:12,469 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 07:42:12,470 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 07:42:12,470 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 07:42:12,471 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 07:42:12,472 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 07:42:12,473 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 07:42:12,473 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 07:42:12,474 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 07:42:12,475 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 07:42:12,475 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 07:42:12,475 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 07:42:12,476 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 07:42:12,476 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 07:42:12,476 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 07:42:12,477 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 07:42:12,477 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 07:42:12,478 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 07:42:12,478 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 07:42:12,478 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 07:42:12,478 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 07:42:12,479 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 07:42:12,479 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 07:42:12,479 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-12-09 07:42:12,486 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 07:42:12,486 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 07:42:12,487 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 07:42:12,487 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 07:42:12,487 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 07:42:12,487 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 07:42:12,487 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 07:42:12,487 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 07:42:12,488 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 07:42:12,488 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 07:42:12,488 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 07:42:12,488 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 07:42:12,488 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 07:42:12,488 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 07:42:12,488 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 07:42:12,488 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 07:42:12,489 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 07:42:12,489 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 07:42:12,490 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 07:42:12,490 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 07:42:12,490 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 07:42:12,490 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 07:42:12,490 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 07:42:12,490 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 07:42:12,490 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 07:42:12,490 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 07:42:12,490 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_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c09c2a46ed7454ea61f3b2ddb99e3e2ba9fd4da [2018-12-09 07:42:12,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 07:42:12,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 07:42:12,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 07:42:12,521 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 07:42:12,521 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 07:42:12,522 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-12-09 07:42:12,555 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/data/efd7ec2a6/db0fc075dd6246a58ec2c0218a3795f2/FLAG01d82fb1e [2018-12-09 07:42:12,993 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 07:42:12,993 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-12-09 07:42:12,996 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/data/efd7ec2a6/db0fc075dd6246a58ec2c0218a3795f2/FLAG01d82fb1e [2018-12-09 07:42:13,005 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/data/efd7ec2a6/db0fc075dd6246a58ec2c0218a3795f2 [2018-12-09 07:42:13,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 07:42:13,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 07:42:13,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 07:42:13,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 07:42:13,011 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 07:42:13,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd2551a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13, skipping insertion in model container [2018-12-09 07:42:13,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 07:42:13,032 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 07:42:13,115 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 07:42:13,117 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 07:42:13,125 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 07:42:13,132 INFO L195 MainTranslator]: Completed translation [2018-12-09 07:42:13,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13 WrapperNode [2018-12-09 07:42:13,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 07:42:13,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 07:42:13,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 07:42:13,133 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 07:42:13,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 07:42:13,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 07:42:13,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 07:42:13,144 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 07:42:13,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... [2018-12-09 07:42:13,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 07:42:13,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 07:42:13,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 07:42:13,155 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 07:42:13,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/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 [2018-12-09 07:42:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 07:42:13,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 07:42:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 07:42:13,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 07:42:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 07:42:13,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 07:42:13,302 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 07:42:13,302 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 07:42:13,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:42:13 BoogieIcfgContainer [2018-12-09 07:42:13,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 07:42:13,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 07:42:13,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 07:42:13,304 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 07:42:13,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:42:13" (1/3) ... [2018-12-09 07:42:13,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5611a2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:42:13, skipping insertion in model container [2018-12-09 07:42:13,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:42:13" (2/3) ... [2018-12-09 07:42:13,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5611a2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:42:13, skipping insertion in model container [2018-12-09 07:42:13,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:42:13" (3/3) ... [2018-12-09 07:42:13,306 INFO L112 eAbstractionObserver]: Analyzing ICFG BradleyMannaSipma-CAV2005-Fig1_true-termination_true-no-overflow.c [2018-12-09 07:42:13,313 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 07:42:13,317 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-12-09 07:42:13,325 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-12-09 07:42:13,342 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 07:42:13,342 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 07:42:13,343 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 07:42:13,343 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 07:42:13,343 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 07:42:13,343 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 07:42:13,343 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 07:42:13,343 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 07:42:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-12-09 07:42:13,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 07:42:13,361 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 07:42:13,361 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 07:42:13,362 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 07:42:13,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash 350361843, now seen corresponding path program 1 times [2018-12-09 07:42:13,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 07:42:13,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:13,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:13,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:13,406 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 07:42:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:13,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 07:42:13,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 07:42:13,466 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 07:42:13,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 07:42:13,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 07:42:13,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 07:42:13,478 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2018-12-09 07:42:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 07:42:13,553 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-12-09 07:42:13,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 07:42:13,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-12-09 07:42:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 07:42:13,561 INFO L225 Difference]: With dead ends: 46 [2018-12-09 07:42:13,561 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 07:42:13,562 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 [2018-12-09 07:42:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 07:42:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-12-09 07:42:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 07:42:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-12-09 07:42:13,583 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 9 [2018-12-09 07:42:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 07:42:13,583 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-12-09 07:42:13,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 07:42:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-12-09 07:42:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 07:42:13,584 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 07:42:13,584 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 07:42:13,584 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 07:42:13,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 350362035, now seen corresponding path program 1 times [2018-12-09 07:42:13,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 07:42:13,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:13,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:13,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:13,586 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 07:42:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:13,611 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 07:42:13,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 07:42:13,611 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 07:42:13,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 07:42:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 07:42:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 07:42:13,613 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2018-12-09 07:42:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 07:42:13,657 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-12-09 07:42:13,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 07:42:13,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-12-09 07:42:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 07:42:13,657 INFO L225 Difference]: With dead ends: 29 [2018-12-09 07:42:13,658 INFO L226 Difference]: Without dead ends: 27 [2018-12-09 07:42:13,658 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 [2018-12-09 07:42:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-09 07:42:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-12-09 07:42:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 07:42:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-12-09 07:42:13,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 9 [2018-12-09 07:42:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 07:42:13,661 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-12-09 07:42:13,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 07:42:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-12-09 07:42:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 07:42:13,661 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 07:42:13,661 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 07:42:13,661 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 07:42:13,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash 865022446, now seen corresponding path program 1 times [2018-12-09 07:42:13,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 07:42:13,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:13,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:13,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:13,663 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 07:42:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:13,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:13,688 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 07:42:13,689 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-09 07:42:13,690 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [16], [19], [20], [21], [23], [39], [40], [41] [2018-12-09 07:42:13,709 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 07:42:13,709 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 07:42:13,770 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 07:42:13,771 INFO L272 AbstractInterpreter]: Visited 11 different actions 11 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 3. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-12-09 07:42:13,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:13,776 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 07:42:13,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:13,777 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/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 [2018-12-09 07:42:13,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:13,783 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 07:42:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:13,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 07:42:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:13,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 07:42:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:13,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 07:42:13,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2018-12-09 07:42:13,883 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 07:42:13,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 07:42:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 07:42:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-09 07:42:13,884 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2018-12-09 07:42:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 07:42:13,919 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-12-09 07:42:13,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 07:42:13,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 07:42:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 07:42:13,920 INFO L225 Difference]: With dead ends: 36 [2018-12-09 07:42:13,920 INFO L226 Difference]: Without dead ends: 35 [2018-12-09 07:42:13,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-09 07:42:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-09 07:42:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2018-12-09 07:42:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 07:42:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-12-09 07:42:13,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2018-12-09 07:42:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 07:42:13,924 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-12-09 07:42:13,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 07:42:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-12-09 07:42:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 07:42:13,924 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 07:42:13,924 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 07:42:13,925 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 07:42:13,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash 865022638, now seen corresponding path program 1 times [2018-12-09 07:42:13,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 07:42:13,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:13,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:13,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:13,926 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 07:42:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:13,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:13,947 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 07:42:13,947 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-09 07:42:13,948 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [16], [19], [21], [23], [25], [26], [39], [40], [41] [2018-12-09 07:42:13,948 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 07:42:13,949 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 07:42:13,957 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 07:42:13,957 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 3. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-12-09 07:42:13,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:13,959 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 07:42:13,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:13,959 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/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 [2018-12-09 07:42:13,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:13,967 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 07:42:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:13,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 07:42:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 07:42:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 07:42:14,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-09 07:42:14,051 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 07:42:14,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 07:42:14,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 07:42:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-12-09 07:42:14,052 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 8 states. [2018-12-09 07:42:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 07:42:14,143 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2018-12-09 07:42:14,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 07:42:14,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-12-09 07:42:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 07:42:14,143 INFO L225 Difference]: With dead ends: 52 [2018-12-09 07:42:14,144 INFO L226 Difference]: Without dead ends: 51 [2018-12-09 07:42:14,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2018-12-09 07:42:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-09 07:42:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2018-12-09 07:42:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-09 07:42:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2018-12-09 07:42:14,148 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 13 [2018-12-09 07:42:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 07:42:14,148 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2018-12-09 07:42:14,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 07:42:14,148 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2018-12-09 07:42:14,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 07:42:14,148 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 07:42:14,149 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 07:42:14,149 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 07:42:14,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1042517224, now seen corresponding path program 1 times [2018-12-09 07:42:14,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 07:42:14,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:14,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:14,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:14,150 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 07:42:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:14,178 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 07:42:14,178 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-09 07:42:14,178 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [16], [19], [20], [25], [27], [29], [39], [40], [41] [2018-12-09 07:42:14,179 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 07:42:14,179 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 07:42:14,186 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 07:42:14,186 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 4. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-12-09 07:42:14,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:14,187 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 07:42:14,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:14,188 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/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 [2018-12-09 07:42:14,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:14,194 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 07:42:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:14,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 07:42:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 07:42:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 07:42:14,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2018-12-09 07:42:14,245 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 07:42:14,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 07:42:14,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 07:42:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-12-09 07:42:14,246 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 5 states. [2018-12-09 07:42:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 07:42:14,271 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-12-09 07:42:14,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 07:42:14,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 07:42:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 07:42:14,272 INFO L225 Difference]: With dead ends: 35 [2018-12-09 07:42:14,272 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 07:42:14,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-12-09 07:42:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 07:42:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2018-12-09 07:42:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 07:42:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2018-12-09 07:42:14,275 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2018-12-09 07:42:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 07:42:14,275 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2018-12-09 07:42:14,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 07:42:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2018-12-09 07:42:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 07:42:14,276 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 07:42:14,276 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 07:42:14,276 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 07:42:14,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:14,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1042517416, now seen corresponding path program 1 times [2018-12-09 07:42:14,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 07:42:14,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:14,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:14,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:14,277 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 07:42:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:14,300 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 07:42:14,300 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-09 07:42:14,300 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [16], [25], [26], [27], [29], [39], [40], [41] [2018-12-09 07:42:14,301 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 07:42:14,301 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 07:42:14,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 07:42:14,308 INFO L272 AbstractInterpreter]: Visited 11 different actions 11 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 4. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-12-09 07:42:14,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:14,309 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 07:42:14,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:14,309 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/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 [2018-12-09 07:42:14,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:14,315 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 07:42:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:14,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 07:42:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 07:42:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 07:42:14,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2018-12-09 07:42:14,385 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 07:42:14,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 07:42:14,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 07:42:14,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-09 07:42:14,385 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2018-12-09 07:42:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 07:42:14,425 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2018-12-09 07:42:14,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 07:42:14,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 07:42:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 07:42:14,426 INFO L225 Difference]: With dead ends: 47 [2018-12-09 07:42:14,427 INFO L226 Difference]: Without dead ends: 46 [2018-12-09 07:42:14,427 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-09 07:42:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-09 07:42:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 24. [2018-12-09 07:42:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 07:42:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-09 07:42:14,431 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2018-12-09 07:42:14,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 07:42:14,431 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-09 07:42:14,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 07:42:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-09 07:42:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-09 07:42:14,432 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 07:42:14,432 INFO L402 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 07:42:14,433 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 07:42:14,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1987862754, now seen corresponding path program 1 times [2018-12-09 07:42:14,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 07:42:14,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:14,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:14,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 07:42:14,434 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 07:42:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 07:42:14,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:14,476 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 07:42:14,476 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-12-09 07:42:14,476 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [16], [19], [21], [23], [25], [26], [27], [29], [39], [40], [41] [2018-12-09 07:42:14,477 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 07:42:14,477 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 07:42:14,485 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 07:42:14,486 INFO L272 AbstractInterpreter]: Visited 14 different actions 14 times. Never merged. Never widened. Performed 36 root evaluator evaluations with a maximum evaluation depth of 4. Performed 36 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 4 variables. [2018-12-09 07:42:14,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 07:42:14,487 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 07:42:14,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 07:42:14,488 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/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 [2018-12-09 07:42:14,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 07:42:14,494 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 07:42:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 07:42:14,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 07:42:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 07:42:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 07:42:14,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 07:42:14,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2018-12-09 07:42:14,650 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 07:42:14,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 07:42:14,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 07:42:14,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-12-09 07:42:14,651 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 11 states. [2018-12-09 07:42:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 07:42:14,823 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-12-09 07:42:14,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 07:42:14,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-12-09 07:42:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 07:42:14,824 INFO L225 Difference]: With dead ends: 45 [2018-12-09 07:42:14,824 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 07:42:14,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2018-12-09 07:42:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 07:42:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 07:42:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 07:42:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 07:42:14,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-12-09 07:42:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 07:42:14,825 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 07:42:14,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 07:42:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 07:42:14,826 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 07:42:14,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 07:42:14,844 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 07:42:14,849 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 07:42:14,852 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 07:42:14,853 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 07:42:14,902 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 07:42:14,902 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 07:42:14,902 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 07:42:14,903 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 07:42:14,903 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 07:42:14,903 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 07:42:14,903 INFO L448 ceAbstractionStarter]: For program point mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-12-09 07:42:14,903 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 14 28) no Hoare annotation was computed. [2018-12-09 07:42:14,903 INFO L448 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-12-09 07:42:14,903 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-09 07:42:14,903 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-12-09 07:42:14,904 INFO L448 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-12-09 07:42:14,904 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 14 28) no Hoare annotation was computed. [2018-12-09 07:42:14,904 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-12-09 07:42:14,904 INFO L448 ceAbstractionStarter]: For program point mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-12-09 07:42:14,904 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 14 28) the Hoare annotation is: true [2018-12-09 07:42:14,904 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-09 07:42:14,904 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 26) no Hoare annotation was computed. [2018-12-09 07:42:14,904 INFO L444 ceAbstractionStarter]: At program point L20-2(lines 19 25) the Hoare annotation is: (and (<= 1 main_~y1~0) (<= 0 main_~y2~0) (<= main_~y2~0 2147483647) (<= main_~y1~0 2147483647)) [2018-12-09 07:42:14,904 INFO L448 ceAbstractionStarter]: For program point L18-1(lines 18 26) no Hoare annotation was computed. [2018-12-09 07:42:14,905 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-12-09 07:42:14,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:42:14 BoogieIcfgContainer [2018-12-09 07:42:14,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 07:42:14,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 07:42:14,913 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 07:42:14,913 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 07:42:14,913 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:42:13" (3/4) ... [2018-12-09 07:42:14,915 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 07:42:14,918 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 07:42:14,918 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 07:42:14,921 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-09 07:42:14,921 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-09 07:42:14,921 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 07:42:14,950 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7ec646e3-97f6-4899-94f5-504cdc7ee1b9/bin-2019/utaipan/witness.graphml [2018-12-09 07:42:14,950 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 07:42:14,950 INFO L168 Benchmark]: Toolchain (without parser) took 1943.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.8 MB). Free memory was 957.1 MB in the beginning and 780.6 MB in the end (delta: 176.5 MB). Peak memory consumption was 268.2 MB. Max. memory is 11.5 GB. [2018-12-09 07:42:14,951 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 07:42:14,951 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.87 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 07:42:14,952 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.96 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 07:42:14,952 INFO L168 Benchmark]: Boogie Preprocessor took 10.86 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 07:42:14,952 INFO L168 Benchmark]: RCFGBuilder took 147.00 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.8 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -124.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-12-09 07:42:14,953 INFO L168 Benchmark]: TraceAbstraction took 1609.46 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 780.6 MB in the end (delta: 290.1 MB). Peak memory consumption was 290.1 MB. Max. memory is 11.5 GB. [2018-12-09 07:42:14,953 INFO L168 Benchmark]: Witness Printer took 37.44 ms. Allocated memory is still 1.1 GB. Free memory is still 780.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 07:42:14,955 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 124.87 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 10.96 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.86 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 147.00 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.8 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -124.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1609.46 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 780.6 MB in the end (delta: 290.1 MB). Peak memory consumption was 290.1 MB. Max. memory is 11.5 GB. * Witness Printer took 37.44 ms. Allocated memory is still 1.1 GB. Free memory is still 780.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((1 <= y1 && 0 <= y2) && y2 <= 2147483647) && y1 <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 4 error locations. SAFE Result, 1.5s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 156 SDslu, 98 SDs, 0 SdLazy, 383 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 79 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 12 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 378 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 208 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 220 ConstructedInterpolants, 14 QuantifiedInterpolants, 15772 SizeOfPredicates, 10 NumberOfNonLiveVariables, 157 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 25/75 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...