./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/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 94b61e96441ca10668b436b4ef10dfd9464f0863 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:31:39,686 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:31:39,688 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:31:39,696 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:31:39,697 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:31:39,697 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:31:39,699 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:31:39,700 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:31:39,701 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:31:39,702 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:31:39,703 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:31:39,703 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:31:39,704 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:31:39,705 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:31:39,705 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:31:39,706 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:31:39,707 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:31:39,708 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:31:39,710 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:31:39,711 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:31:39,712 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:31:39,713 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:31:39,715 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:31:39,715 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:31:39,715 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:31:39,716 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:31:39,716 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:31:39,717 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:31:39,718 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:31:39,719 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:31:39,719 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:31:39,719 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:31:39,720 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:31:39,720 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:31:39,721 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:31:39,721 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:31:39,721 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-11-18 12:31:39,732 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:31:39,732 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:31:39,732 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:31:39,733 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 12:31:39,733 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 12:31:39,733 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 12:31:39,733 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 12:31:39,733 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 12:31:39,733 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 12:31:39,734 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 12:31:39,734 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 12:31:39,734 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 12:31:39,734 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 12:31:39,735 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:31:39,735 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 12:31:39,735 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:31:39,735 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:31:39,735 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:31:39,735 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:31:39,735 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:31:39,736 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 12:31:39,736 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:31:39,736 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:31:39,736 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:31:39,736 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:31:39,736 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:31:39,737 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:31:39,737 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:31:39,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:31:39,737 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:31:39,737 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:31:39,737 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:31:39,737 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 12:31:39,737 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:31:39,738 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:31:39,738 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 12:31:39,738 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_f41c92e0-d61d-406b-ac60-051e01c2c079/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 -> 94b61e96441ca10668b436b4ef10dfd9464f0863 [2018-11-18 12:31:39,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:31:39,768 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:31:39,771 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:31:39,772 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:31:39,772 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:31:39,773 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c [2018-11-18 12:31:39,813 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/data/1182b83a7/2dccfe93d02b4045888b8156baa66cc0/FLAGf5c98965c [2018-11-18 12:31:40,216 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:31:40,217 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c [2018-11-18 12:31:40,221 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/data/1182b83a7/2dccfe93d02b4045888b8156baa66cc0/FLAGf5c98965c [2018-11-18 12:31:40,232 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/data/1182b83a7/2dccfe93d02b4045888b8156baa66cc0 [2018-11-18 12:31:40,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:31:40,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 12:31:40,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:31:40,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:31:40,239 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:31:40,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f35898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40, skipping insertion in model container [2018-11-18 12:31:40,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:31:40,258 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:31:40,365 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:31:40,368 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:31:40,377 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:31:40,386 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:31:40,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40 WrapperNode [2018-11-18 12:31:40,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:31:40,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 12:31:40,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 12:31:40,387 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 12:31:40,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 12:31:40,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:31:40,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:31:40,400 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:31:40,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... [2018-11-18 12:31:40,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:31:40,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:31:40,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:31:40,413 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:31:40,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:31:40,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:31:40,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:31:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:31:40,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:31:40,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:31:40,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:31:40,582 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:31:40,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:31:40 BoogieIcfgContainer [2018-11-18 12:31:40,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:31:40,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:31:40,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:31:40,585 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:31:40,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:31:40" (1/3) ... [2018-11-18 12:31:40,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec7a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:31:40, skipping insertion in model container [2018-11-18 12:31:40,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:31:40" (2/3) ... [2018-11-18 12:31:40,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec7a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:31:40, skipping insertion in model container [2018-11-18 12:31:40,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:31:40" (3/3) ... [2018-11-18 12:31:40,587 INFO L112 eAbstractionObserver]: Analyzing ICFG NonTermination4_false-no-overflow.c [2018-11-18 12:31:40,593 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:31:40,597 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-18 12:31:40,606 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-18 12:31:40,625 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:31:40,625 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:31:40,625 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:31:40,625 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:31:40,626 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:31:40,626 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:31:40,626 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:31:40,626 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:31:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 12:31:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-18 12:31:40,642 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:40,642 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:40,644 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:40,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash 604672971, now seen corresponding path program 1 times [2018-11-18 12:31:40,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:40,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:40,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,683 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:40,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:31:40,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:31:40,742 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:31:40,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:31:40,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:31:40,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:31:40,762 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2018-11-18 12:31:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:40,794 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 12:31:40,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:31:40,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-11-18 12:31:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:40,800 INFO L225 Difference]: With dead ends: 30 [2018-11-18 12:31:40,800 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 12:31:40,802 INFO L604 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 [2018-11-18 12:31:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 12:31:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-11-18 12:31:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 12:31:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-18 12:31:40,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-11-18 12:31:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:40,825 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-18 12:31:40,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:31:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-18 12:31:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 12:31:40,826 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:40,826 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:40,827 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:40,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:40,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1564992965, now seen corresponding path program 1 times [2018-11-18 12:31:40,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:40,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:40,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,829 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:40,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:31:40,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:31:40,858 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:31:40,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:31:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:31:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:31:40,859 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-11-18 12:31:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:40,865 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-18 12:31:40,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:31:40,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-11-18 12:31:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:40,866 INFO L225 Difference]: With dead ends: 18 [2018-11-18 12:31:40,866 INFO L226 Difference]: Without dead ends: 17 [2018-11-18 12:31:40,867 INFO L604 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 [2018-11-18 12:31:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-18 12:31:40,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-18 12:31:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-18 12:31:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-11-18 12:31:40,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 9 [2018-11-18 12:31:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:40,869 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-11-18 12:31:40,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:31:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-11-18 12:31:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 12:31:40,869 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:40,869 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:40,869 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:40,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:40,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1270141709, now seen corresponding path program 1 times [2018-11-18 12:31:40,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:40,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:40,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,871 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:40,910 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:31:40,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:31:40,910 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:31:40,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:31:40,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:31:40,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:31:40,911 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2018-11-18 12:31:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:40,931 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-11-18 12:31:40,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:31:40,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-18 12:31:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:40,932 INFO L225 Difference]: With dead ends: 21 [2018-11-18 12:31:40,932 INFO L226 Difference]: Without dead ends: 20 [2018-11-18 12:31:40,932 INFO L604 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 [2018-11-18 12:31:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-18 12:31:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-11-18 12:31:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 12:31:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-18 12:31:40,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2018-11-18 12:31:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:40,935 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-18 12:31:40,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:31:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-18 12:31:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 12:31:40,936 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:40,936 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:40,936 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:40,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash 719687367, now seen corresponding path program 1 times [2018-11-18 12:31:40,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:40,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:40,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,938 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:40,953 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:31:40,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:31:40,953 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:31:40,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:31:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:31:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:31:40,954 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 3 states. [2018-11-18 12:31:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:40,960 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-18 12:31:40,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:31:40,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 12:31:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:40,960 INFO L225 Difference]: With dead ends: 19 [2018-11-18 12:31:40,960 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 12:31:40,961 INFO L604 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 [2018-11-18 12:31:40,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 12:31:40,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 12:31:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 12:31:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-18 12:31:40,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2018-11-18 12:31:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:40,963 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-18 12:31:40,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:31:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-18 12:31:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 12:31:40,963 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:40,963 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:40,964 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:40,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash -270353407, now seen corresponding path program 1 times [2018-11-18 12:31:40,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:40,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:40,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:40,965 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:40,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:40,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:40,991 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-11-18 12:31:40,992 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [14], [15], [16], [18], [20], [22], [28], [29], [30] [2018-11-18 12:31:41,010 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:31:41,011 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:31:41,103 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:31:41,104 INFO L272 AbstractInterpreter]: Visited 12 different actions 26 times. Merged at 6 different actions 12 times. Never widened. Performed 80 root evaluator evaluations with a maximum evaluation depth of 3. Performed 80 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-11-18 12:31:41,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:41,110 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:31:41,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,110 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:41,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:41,117 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:41,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,154 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:41,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-11-18 12:31:41,202 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:41,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 12:31:41,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 12:31:41,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:31:41,202 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 4 states. [2018-11-18 12:31:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:41,226 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-18 12:31:41,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 12:31:41,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-11-18 12:31:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:41,227 INFO L225 Difference]: With dead ends: 24 [2018-11-18 12:31:41,227 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 12:31:41,227 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:31:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 12:31:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-11-18 12:31:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 12:31:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-18 12:31:41,231 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 14 [2018-11-18 12:31:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:41,231 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-18 12:31:41,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 12:31:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-18 12:31:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-18 12:31:41,231 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:41,232 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:41,232 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:41,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:41,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2111584829, now seen corresponding path program 1 times [2018-11-18 12:31:41,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:41,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:41,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,234 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:41,257 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-11-18 12:31:41,257 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [18], [19], [20], [22], [28], [29], [30] [2018-11-18 12:31:41,258 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:31:41,258 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:31:41,287 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:31:41,288 INFO L272 AbstractInterpreter]: Visited 12 different actions 26 times. Merged at 6 different actions 12 times. Never widened. Performed 80 root evaluator evaluations with a maximum evaluation depth of 3. Performed 80 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-11-18 12:31:41,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:41,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:31:41,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,290 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:41,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:41,296 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:41,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,314 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:41,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-11-18 12:31:41,384 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:41,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 12:31:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 12:31:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:31:41,385 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 4 states. [2018-11-18 12:31:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:41,413 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-18 12:31:41,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 12:31:41,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-11-18 12:31:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:41,414 INFO L225 Difference]: With dead ends: 26 [2018-11-18 12:31:41,414 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 12:31:41,415 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:31:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 12:31:41,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-11-18 12:31:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:31:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-18 12:31:41,418 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 16 [2018-11-18 12:31:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:41,418 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-18 12:31:41,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 12:31:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-18 12:31:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 12:31:41,419 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:41,419 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:41,419 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:41,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:41,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1685232713, now seen corresponding path program 2 times [2018-11-18 12:31:41,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:41,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:41,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,425 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,453 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:41,453 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:41,453 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:41,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,453 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:41,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:31:41,466 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:31:41,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 12:31:41,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:41,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:41,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-11-18 12:31:41,542 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:41,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:31:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:31:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:31:41,543 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 5 states. [2018-11-18 12:31:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:41,560 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-11-18 12:31:41,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:31:41,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-11-18 12:31:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:41,561 INFO L225 Difference]: With dead ends: 30 [2018-11-18 12:31:41,561 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 12:31:41,561 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:31:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 12:31:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-11-18 12:31:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 12:31:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-18 12:31:41,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 20 [2018-11-18 12:31:41,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:41,565 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-18 12:31:41,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:31:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-18 12:31:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 12:31:41,565 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:41,566 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:41,566 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:41,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:41,566 INFO L82 PathProgramCache]: Analyzing trace with hash -305965063, now seen corresponding path program 2 times [2018-11-18 12:31:41,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:41,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:41,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,567 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,595 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:41,595 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:41,596 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:41,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,596 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:41,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:31:41,608 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:31:41,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 12:31:41,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:41,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:41,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-11-18 12:31:41,713 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:41,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:31:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:31:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:31:41,714 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 5 states. [2018-11-18 12:31:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:41,724 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-11-18 12:31:41,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:31:41,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-18 12:31:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:41,725 INFO L225 Difference]: With dead ends: 32 [2018-11-18 12:31:41,725 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 12:31:41,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:31:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 12:31:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-11-18 12:31:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 12:31:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-18 12:31:41,728 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 22 [2018-11-18 12:31:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:41,728 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-18 12:31:41,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:31:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-18 12:31:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 12:31:41,729 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:41,729 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:41,729 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:41,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:41,729 INFO L82 PathProgramCache]: Analyzing trace with hash 739044077, now seen corresponding path program 3 times [2018-11-18 12:31:41,729 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:41,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:41,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,731 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,766 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:41,766 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:41,767 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:41,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:41,773 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:31:41,773 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:31:41,780 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:31:41,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:41,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,825 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:41,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-18 12:31:41,875 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:41,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:31:41,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:31:41,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:31:41,875 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 6 states. [2018-11-18 12:31:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:41,899 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-11-18 12:31:41,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:31:41,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-11-18 12:31:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:41,900 INFO L225 Difference]: With dead ends: 36 [2018-11-18 12:31:41,900 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 12:31:41,901 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:31:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 12:31:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-11-18 12:31:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 12:31:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-11-18 12:31:41,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 26 [2018-11-18 12:31:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:41,904 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-11-18 12:31:41,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:31:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-11-18 12:31:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-18 12:31:41,907 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:41,907 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:41,907 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:41,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:41,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1551755695, now seen corresponding path program 3 times [2018-11-18 12:31:41,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:41,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:41,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:41,909 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:41,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,960 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:41,961 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:41,961 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:41,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:41,961 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:41,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:31:41,978 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:31:41,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:31:41,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:41,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:42,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-18 12:31:42,140 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:42,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:31:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:31:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:31:42,141 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 6 states. [2018-11-18 12:31:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:42,160 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-11-18 12:31:42,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:31:42,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-11-18 12:31:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:42,161 INFO L225 Difference]: With dead ends: 38 [2018-11-18 12:31:42,161 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 12:31:42,161 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:31:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 12:31:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-11-18 12:31:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 12:31:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-11-18 12:31:42,164 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 28 [2018-11-18 12:31:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:42,164 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-11-18 12:31:42,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:31:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-11-18 12:31:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 12:31:42,165 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:42,165 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:42,165 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:42,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1290030685, now seen corresponding path program 4 times [2018-11-18 12:31:42,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:42,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:42,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:42,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:42,166 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:42,210 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:42,210 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:42,210 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:42,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:42,211 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:42,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:42,217 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:42,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:42,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-11-18 12:31:42,332 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:42,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 12:31:42,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 12:31:42,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:31:42,333 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 7 states. [2018-11-18 12:31:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:42,351 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-18 12:31:42,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:31:42,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2018-11-18 12:31:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:42,352 INFO L225 Difference]: With dead ends: 42 [2018-11-18 12:31:42,352 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 12:31:42,353 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:31:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 12:31:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-11-18 12:31:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 12:31:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-11-18 12:31:42,357 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 32 [2018-11-18 12:31:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:42,357 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-11-18 12:31:42,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 12:31:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-11-18 12:31:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-18 12:31:42,358 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:42,358 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:42,358 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:42,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1526061797, now seen corresponding path program 4 times [2018-11-18 12:31:42,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:42,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:42,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:42,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:42,360 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:42,403 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:42,403 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:42,403 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:42,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:42,403 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:42,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:42,410 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:42,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:42,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-11-18 12:31:42,562 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:42,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 12:31:42,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 12:31:42,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:31:42,563 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 7 states. [2018-11-18 12:31:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:42,577 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-11-18 12:31:42,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:31:42,577 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2018-11-18 12:31:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:42,578 INFO L225 Difference]: With dead ends: 44 [2018-11-18 12:31:42,578 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 12:31:42,578 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:31:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 12:31:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-11-18 12:31:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 12:31:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-11-18 12:31:42,581 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 34 [2018-11-18 12:31:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:42,581 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-11-18 12:31:42,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 12:31:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-11-18 12:31:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 12:31:42,582 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:42,582 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:42,583 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:42,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:42,583 INFO L82 PathProgramCache]: Analyzing trace with hash -450095143, now seen corresponding path program 5 times [2018-11-18 12:31:42,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:42,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:42,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:42,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:42,584 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:42,632 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:42,632 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:42,632 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:42,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:42,632 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:42,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:31:42,644 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:31:42,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 12:31:42,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:42,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:42,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-18 12:31:42,764 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:42,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 12:31:42,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 12:31:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:31:42,764 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 8 states. [2018-11-18 12:31:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:42,785 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-11-18 12:31:42,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 12:31:42,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2018-11-18 12:31:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:42,787 INFO L225 Difference]: With dead ends: 48 [2018-11-18 12:31:42,787 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 12:31:42,788 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:31:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 12:31:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2018-11-18 12:31:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 12:31:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-11-18 12:31:42,791 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 38 [2018-11-18 12:31:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:42,791 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-11-18 12:31:42,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 12:31:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-11-18 12:31:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 12:31:42,792 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:42,792 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:42,792 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:42,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1250266011, now seen corresponding path program 5 times [2018-11-18 12:31:42,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:42,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:42,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:42,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:42,793 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:42,840 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:42,840 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:42,840 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:42,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:42,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:42,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:31:42,856 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:31:42,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 12:31:42,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:42,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:42,921 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:43,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-11-18 12:31:43,117 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:43,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 12:31:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 12:31:43,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:31:43,118 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 8 states. [2018-11-18 12:31:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:43,133 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-11-18 12:31:43,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 12:31:43,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-18 12:31:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:43,134 INFO L225 Difference]: With dead ends: 50 [2018-11-18 12:31:43,134 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 12:31:43,134 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:31:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 12:31:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-11-18 12:31:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 12:31:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-11-18 12:31:43,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 40 [2018-11-18 12:31:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:43,137 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-11-18 12:31:43,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 12:31:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-11-18 12:31:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 12:31:43,138 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:43,138 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:43,138 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:43,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:43,138 INFO L82 PathProgramCache]: Analyzing trace with hash 795377039, now seen corresponding path program 6 times [2018-11-18 12:31:43,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:43,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:43,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:43,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:43,139 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:43,181 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:43,181 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:43,181 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:43,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:43,181 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:43,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:31:43,201 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:31:43,216 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:31:43,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:43,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:43,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-11-18 12:31:43,411 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:43,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:31:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:31:43,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:31:43,411 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 9 states. [2018-11-18 12:31:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:43,430 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-11-18 12:31:43,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:31:43,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-11-18 12:31:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:43,431 INFO L225 Difference]: With dead ends: 54 [2018-11-18 12:31:43,431 INFO L226 Difference]: Without dead ends: 53 [2018-11-18 12:31:43,431 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:31:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-18 12:31:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-11-18 12:31:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-18 12:31:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-11-18 12:31:43,435 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 44 [2018-11-18 12:31:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:43,435 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-11-18 12:31:43,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:31:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-11-18 12:31:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-18 12:31:43,436 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:43,436 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:43,436 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:43,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash -146842671, now seen corresponding path program 6 times [2018-11-18 12:31:43,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:43,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:43,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:43,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:43,437 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:43,490 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:43,490 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:43,490 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:43,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:43,490 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:43,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:31:43,504 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:31:43,513 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:31:43,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:43,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:43,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-11-18 12:31:43,764 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:43,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:31:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:31:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:31:43,764 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 9 states. [2018-11-18 12:31:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:43,776 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-11-18 12:31:43,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:31:43,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2018-11-18 12:31:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:43,777 INFO L225 Difference]: With dead ends: 56 [2018-11-18 12:31:43,777 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 12:31:43,777 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:31:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 12:31:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-11-18 12:31:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 12:31:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-11-18 12:31:43,781 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 46 [2018-11-18 12:31:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:43,781 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-11-18 12:31:43,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:31:43,781 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-11-18 12:31:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-18 12:31:43,782 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:43,782 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:43,782 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:43,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1303593669, now seen corresponding path program 7 times [2018-11-18 12:31:43,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:43,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:43,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:43,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:43,783 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:43,839 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:43,839 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:43,839 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:43,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:43,839 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:43,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:43,858 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:43,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:43,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:44,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:44,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-11-18 12:31:44,017 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:44,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 12:31:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 12:31:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:31:44,017 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 10 states. [2018-11-18 12:31:44,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:44,038 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-11-18 12:31:44,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 12:31:44,038 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2018-11-18 12:31:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:44,039 INFO L225 Difference]: With dead ends: 60 [2018-11-18 12:31:44,039 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 12:31:44,039 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:31:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 12:31:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-11-18 12:31:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-18 12:31:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-11-18 12:31:44,042 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 50 [2018-11-18 12:31:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:44,042 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-11-18 12:31:44,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 12:31:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-11-18 12:31:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-18 12:31:44,043 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:44,043 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:44,043 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:44,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:44,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1376932985, now seen corresponding path program 7 times [2018-11-18 12:31:44,044 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:44,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:44,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:44,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:44,045 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:44,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:44,093 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:44,093 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:44,093 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:44,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:44,093 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:44,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:44,099 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:44,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:44,170 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:44,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:44,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-11-18 12:31:44,621 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:44,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 12:31:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 12:31:44,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:31:44,622 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 10 states. [2018-11-18 12:31:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:44,643 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-11-18 12:31:44,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 12:31:44,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2018-11-18 12:31:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:44,645 INFO L225 Difference]: With dead ends: 62 [2018-11-18 12:31:44,645 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 12:31:44,645 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:31:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 12:31:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-11-18 12:31:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 12:31:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-11-18 12:31:44,648 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 52 [2018-11-18 12:31:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:44,651 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-11-18 12:31:44,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 12:31:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-11-18 12:31:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 12:31:44,652 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:44,653 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:44,653 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:44,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1621542779, now seen corresponding path program 8 times [2018-11-18 12:31:44,653 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:44,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:44,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:44,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:44,654 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:44,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:44,733 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:44,733 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:44,733 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:44,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:44,733 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:44,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:31:44,743 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:31:44,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-18 12:31:44,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:44,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:44,824 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:44,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:44,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-11-18 12:31:44,924 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:44,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 12:31:44,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 12:31:44,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:31:44,925 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 11 states. [2018-11-18 12:31:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:44,958 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-11-18 12:31:44,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 12:31:44,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-11-18 12:31:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:44,958 INFO L225 Difference]: With dead ends: 66 [2018-11-18 12:31:44,959 INFO L226 Difference]: Without dead ends: 65 [2018-11-18 12:31:44,959 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:31:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-18 12:31:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-11-18 12:31:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 12:31:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-11-18 12:31:44,961 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 56 [2018-11-18 12:31:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:44,961 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-11-18 12:31:44,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 12:31:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-11-18 12:31:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-18 12:31:44,962 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:44,962 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:44,963 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:44,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:44,963 INFO L82 PathProgramCache]: Analyzing trace with hash -770516291, now seen corresponding path program 8 times [2018-11-18 12:31:44,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:44,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:44,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:44,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:44,964 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:45,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:45,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:45,024 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:45,024 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:45,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:45,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:45,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:31:45,042 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:31:45,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-18 12:31:45,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:45,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:45,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:45,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:45,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-11-18 12:31:45,637 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:45,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 12:31:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 12:31:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:31:45,638 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 11 states. [2018-11-18 12:31:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:45,666 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-11-18 12:31:45,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 12:31:45,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2018-11-18 12:31:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:45,667 INFO L225 Difference]: With dead ends: 68 [2018-11-18 12:31:45,667 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 12:31:45,668 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:31:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 12:31:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-11-18 12:31:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 12:31:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-11-18 12:31:45,671 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 58 [2018-11-18 12:31:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:45,671 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-11-18 12:31:45,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 12:31:45,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-11-18 12:31:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-18 12:31:45,671 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:45,672 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:45,672 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:45,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2087359567, now seen corresponding path program 9 times [2018-11-18 12:31:45,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:45,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:45,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:45,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:45,673 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:45,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:45,727 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:45,727 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:45,727 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:45,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:45,727 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:45,734 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:31:45,735 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:31:45,745 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:31:45,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:45,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:45,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:45,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:45,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-11-18 12:31:45,952 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:45,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:31:45,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:31:45,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-18 12:31:45,953 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 12 states. [2018-11-18 12:31:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:45,988 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-11-18 12:31:45,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:31:45,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2018-11-18 12:31:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:45,988 INFO L225 Difference]: With dead ends: 72 [2018-11-18 12:31:45,988 INFO L226 Difference]: Without dead ends: 71 [2018-11-18 12:31:45,989 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-18 12:31:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-18 12:31:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-11-18 12:31:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-18 12:31:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-11-18 12:31:45,991 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 62 [2018-11-18 12:31:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:45,991 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-11-18 12:31:45,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:31:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-11-18 12:31:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-18 12:31:45,992 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:45,992 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:45,992 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:45,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:45,992 INFO L82 PathProgramCache]: Analyzing trace with hash -202815117, now seen corresponding path program 9 times [2018-11-18 12:31:45,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:45,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:45,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:45,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:45,993 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:46,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:46,086 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:46,086 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:46,086 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:46,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:46,087 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:46,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:31:46,094 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:31:46,105 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:31:46,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:46,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:46,183 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 255 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:56,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:56,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-11-18 12:31:56,382 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:56,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:31:56,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:31:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=230, Unknown=2, NotChecked=0, Total=462 [2018-11-18 12:31:56,383 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 12 states. [2018-11-18 12:31:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:56,401 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-11-18 12:31:56,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:31:56,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2018-11-18 12:31:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:56,402 INFO L225 Difference]: With dead ends: 74 [2018-11-18 12:31:56,402 INFO L226 Difference]: Without dead ends: 73 [2018-11-18 12:31:56,402 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 109 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=230, Invalid=230, Unknown=2, NotChecked=0, Total=462 [2018-11-18 12:31:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-18 12:31:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-11-18 12:31:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 12:31:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-11-18 12:31:56,406 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 64 [2018-11-18 12:31:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:56,406 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-11-18 12:31:56,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:31:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-11-18 12:31:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-18 12:31:56,407 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:56,407 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:56,407 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:56,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash -494301337, now seen corresponding path program 10 times [2018-11-18 12:31:56,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:56,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:56,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:56,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:56,412 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:56,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:56,487 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:56,487 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:56,487 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:56,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:56,487 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:56,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:56,495 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:56,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:56,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:56,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:56,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-11-18 12:31:56,685 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:56,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:31:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:31:56,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:31:56,686 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 13 states. [2018-11-18 12:31:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:56,711 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-11-18 12:31:56,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 12:31:56,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2018-11-18 12:31:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:56,712 INFO L225 Difference]: With dead ends: 78 [2018-11-18 12:31:56,712 INFO L226 Difference]: Without dead ends: 77 [2018-11-18 12:31:56,712 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 115 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:31:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-18 12:31:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-11-18 12:31:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-18 12:31:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-11-18 12:31:56,715 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 68 [2018-11-18 12:31:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:56,715 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-11-18 12:31:56,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:31:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-11-18 12:31:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-18 12:31:56,716 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:56,716 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:56,716 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:56,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:56,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1717786537, now seen corresponding path program 10 times [2018-11-18 12:31:56,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:56,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:56,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:56,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:56,718 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:56,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:56,773 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:56,774 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:56,774 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:56,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:56,774 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:56,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:56,780 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:56,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:56,875 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:57,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:57,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-11-18 12:31:57,351 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:57,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:31:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:31:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:31:57,352 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 13 states. [2018-11-18 12:31:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:57,377 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-11-18 12:31:57,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 12:31:57,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2018-11-18 12:31:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:57,377 INFO L225 Difference]: With dead ends: 80 [2018-11-18 12:31:57,377 INFO L226 Difference]: Without dead ends: 79 [2018-11-18 12:31:57,377 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:31:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-18 12:31:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-11-18 12:31:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-18 12:31:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-11-18 12:31:57,380 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 70 [2018-11-18 12:31:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:57,380 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-11-18 12:31:57,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:31:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-11-18 12:31:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-18 12:31:57,380 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:57,381 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:57,381 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:57,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1346736797, now seen corresponding path program 11 times [2018-11-18 12:31:57,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:57,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:57,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:57,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:57,382 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:57,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:57,480 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:57,480 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:57,481 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:57,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:57,481 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:57,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:31:57,493 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:31:57,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-18 12:31:57,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:57,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:57,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:57,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:57,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-11-18 12:31:57,715 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:57,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 12:31:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 12:31:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:31:57,716 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 14 states. [2018-11-18 12:31:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:57,750 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-11-18 12:31:57,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 12:31:57,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-11-18 12:31:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:57,750 INFO L225 Difference]: With dead ends: 84 [2018-11-18 12:31:57,750 INFO L226 Difference]: Without dead ends: 83 [2018-11-18 12:31:57,751 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:31:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-18 12:31:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-11-18 12:31:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-18 12:31:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-11-18 12:31:57,753 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 74 [2018-11-18 12:31:57,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:57,754 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-11-18 12:31:57,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 12:31:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-11-18 12:31:57,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-11-18 12:31:57,754 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:57,754 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:57,755 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:57,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1428907359, now seen corresponding path program 11 times [2018-11-18 12:31:57,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:57,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:57,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:57,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:57,756 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:57,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:57,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:57,824 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:57,824 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:57,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:57,825 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:57,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:31:57,832 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:31:57,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-18 12:31:57,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:57,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:57,930 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:58,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:58,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-11-18 12:31:58,452 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:58,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 12:31:58,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 12:31:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:31:58,453 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 14 states. [2018-11-18 12:31:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:58,479 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-11-18 12:31:58,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 12:31:58,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2018-11-18 12:31:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:58,480 INFO L225 Difference]: With dead ends: 86 [2018-11-18 12:31:58,480 INFO L226 Difference]: Without dead ends: 85 [2018-11-18 12:31:58,480 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 129 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:31:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-18 12:31:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2018-11-18 12:31:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-18 12:31:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-11-18 12:31:58,482 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 76 [2018-11-18 12:31:58,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:58,482 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-11-18 12:31:58,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 12:31:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-11-18 12:31:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-18 12:31:58,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:58,482 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:58,482 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:58,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:58,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1547949395, now seen corresponding path program 12 times [2018-11-18 12:31:58,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:58,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:58,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:58,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:58,483 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:58,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:58,578 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:58,578 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:58,578 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:58,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:58,579 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:58,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:31:58,586 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:31:58,597 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:31:58,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:58,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:58,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:58,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:58,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-11-18 12:31:58,911 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:58,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 12:31:58,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 12:31:58,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-18 12:31:58,912 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 15 states. [2018-11-18 12:31:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:58,951 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-11-18 12:31:58,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 12:31:58,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2018-11-18 12:31:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:58,952 INFO L225 Difference]: With dead ends: 90 [2018-11-18 12:31:58,952 INFO L226 Difference]: Without dead ends: 89 [2018-11-18 12:31:58,952 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-18 12:31:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-18 12:31:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-11-18 12:31:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-18 12:31:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-11-18 12:31:58,955 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 80 [2018-11-18 12:31:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:58,955 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-11-18 12:31:58,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 12:31:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-11-18 12:31:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-18 12:31:58,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:58,956 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:58,956 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:58,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:58,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1520685717, now seen corresponding path program 12 times [2018-11-18 12:31:58,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:58,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:58,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:58,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:58,957 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:59,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:59,130 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:59,131 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:59,131 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:59,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:59,131 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:59,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:31:59,141 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:31:59,155 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:31:59,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:31:59,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:31:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:59,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:31:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:59,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:31:59,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-11-18 12:31:59,769 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:31:59,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 12:31:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 12:31:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-18 12:31:59,770 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 15 states. [2018-11-18 12:31:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:31:59,801 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-11-18 12:31:59,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 12:31:59,802 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-11-18 12:31:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:31:59,803 INFO L225 Difference]: With dead ends: 92 [2018-11-18 12:31:59,803 INFO L226 Difference]: Without dead ends: 91 [2018-11-18 12:31:59,803 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-18 12:31:59,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-18 12:31:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2018-11-18 12:31:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-18 12:31:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-11-18 12:31:59,806 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 82 [2018-11-18 12:31:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:31:59,806 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-11-18 12:31:59,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 12:31:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-11-18 12:31:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-18 12:31:59,807 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:31:59,807 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-18 12:31:59,807 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:31:59,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:31:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash -390678647, now seen corresponding path program 13 times [2018-11-18 12:31:59,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:31:59,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:59,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:31:59,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:31:59,808 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:31:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:31:59,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:59,932 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:31:59,932 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:31:59,932 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:31:59,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:31:59,933 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:31:59,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:31:59,957 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:31:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:31:59,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:00,108 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:00,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:00,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-11-18 12:32:00,295 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:00,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 12:32:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 12:32:00,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-18 12:32:00,296 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 16 states. [2018-11-18 12:32:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:00,328 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-11-18 12:32:00,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 12:32:00,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2018-11-18 12:32:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:00,330 INFO L225 Difference]: With dead ends: 96 [2018-11-18 12:32:00,330 INFO L226 Difference]: Without dead ends: 95 [2018-11-18 12:32:00,330 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-18 12:32:00,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-18 12:32:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-11-18 12:32:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-18 12:32:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-11-18 12:32:00,332 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 86 [2018-11-18 12:32:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:00,332 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-11-18 12:32:00,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 12:32:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-11-18 12:32:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-11-18 12:32:00,333 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:00,333 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:00,333 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:00,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1780023477, now seen corresponding path program 13 times [2018-11-18 12:32:00,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:00,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:00,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:00,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:00,334 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:00,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:00,419 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:00,419 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:00,419 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:00,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:00,419 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:00,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:00,432 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:32:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:00,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:00,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:00,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:00,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-11-18 12:32:00,989 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:00,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 12:32:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 12:32:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-18 12:32:00,990 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 16 states. [2018-11-18 12:32:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:01,020 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-11-18 12:32:01,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 12:32:01,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2018-11-18 12:32:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:01,021 INFO L225 Difference]: With dead ends: 98 [2018-11-18 12:32:01,021 INFO L226 Difference]: Without dead ends: 97 [2018-11-18 12:32:01,021 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 149 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-18 12:32:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-18 12:32:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2018-11-18 12:32:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-18 12:32:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-11-18 12:32:01,025 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 88 [2018-11-18 12:32:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:01,025 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-11-18 12:32:01,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 12:32:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-11-18 12:32:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-18 12:32:01,026 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:01,026 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:01,026 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:01,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1082693951, now seen corresponding path program 14 times [2018-11-18 12:32:01,026 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:01,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:01,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:01,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:01,028 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:01,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:01,132 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:01,132 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:01,132 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:01,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:01,132 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:01,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:32:01,151 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:32:01,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-18 12:32:01,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:32:01,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:01,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:01,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:01,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2018-11-18 12:32:01,520 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:01,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 12:32:01,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 12:32:01,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-18 12:32:01,521 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 17 states. [2018-11-18 12:32:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:01,564 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-11-18 12:32:01,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 12:32:01,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2018-11-18 12:32:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:01,565 INFO L225 Difference]: With dead ends: 102 [2018-11-18 12:32:01,565 INFO L226 Difference]: Without dead ends: 101 [2018-11-18 12:32:01,565 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 155 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-18 12:32:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-11-18 12:32:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-11-18 12:32:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-18 12:32:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-11-18 12:32:01,568 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 92 [2018-11-18 12:32:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:01,568 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-11-18 12:32:01,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 12:32:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-11-18 12:32:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-11-18 12:32:01,569 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:01,569 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:01,569 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:01,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:01,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1086802817, now seen corresponding path program 14 times [2018-11-18 12:32:01,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:01,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:01,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:32:01,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:01,570 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:01,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:01,659 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:01,659 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:01,659 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:01,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:01,659 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:01,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:32:01,669 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:32:01,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-18 12:32:01,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:32:01,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:01,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:02,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:02,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2018-11-18 12:32:02,234 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:02,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 12:32:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 12:32:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-18 12:32:02,235 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 17 states. [2018-11-18 12:32:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:02,258 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-11-18 12:32:02,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 12:32:02,259 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2018-11-18 12:32:02,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:02,259 INFO L225 Difference]: With dead ends: 104 [2018-11-18 12:32:02,259 INFO L226 Difference]: Without dead ends: 103 [2018-11-18 12:32:02,259 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 159 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-18 12:32:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-18 12:32:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-11-18 12:32:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-18 12:32:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-11-18 12:32:02,261 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 94 [2018-11-18 12:32:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:02,262 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-11-18 12:32:02,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 12:32:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-11-18 12:32:02,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-18 12:32:02,262 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:02,262 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:02,262 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:02,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1386489227, now seen corresponding path program 15 times [2018-11-18 12:32:02,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:02,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:02,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:32:02,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:02,263 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:02,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:02,378 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:02,378 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:02,378 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:02,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:02,378 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:02,386 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:32:02,386 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:32:02,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:32:02,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:32:02,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:02,528 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:02,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:02,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-11-18 12:32:02,746 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:02,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:32:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:32:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 12:32:02,747 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 18 states. [2018-11-18 12:32:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:02,792 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-11-18 12:32:02,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 12:32:02,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 98 [2018-11-18 12:32:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:02,793 INFO L225 Difference]: With dead ends: 108 [2018-11-18 12:32:02,793 INFO L226 Difference]: Without dead ends: 107 [2018-11-18 12:32:02,793 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 165 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 12:32:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-18 12:32:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-11-18 12:32:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-18 12:32:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-11-18 12:32:02,801 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 98 [2018-11-18 12:32:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:02,802 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-11-18 12:32:02,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:32:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-11-18 12:32:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-11-18 12:32:02,802 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:02,802 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:02,803 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:02,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:02,803 INFO L82 PathProgramCache]: Analyzing trace with hash -976283849, now seen corresponding path program 15 times [2018-11-18 12:32:02,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:02,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:02,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:32:02,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:02,804 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:02,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:02,953 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:02,953 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:02,953 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:02,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:02,953 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:02,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:32:02,960 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:32:02,974 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:32:02,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:32:02,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:03,170 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:03,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:03,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-11-18 12:32:03,707 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:03,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:32:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:32:03,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 12:32:03,708 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 18 states. [2018-11-18 12:32:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:03,744 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-11-18 12:32:03,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 12:32:03,745 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 100 [2018-11-18 12:32:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:03,745 INFO L225 Difference]: With dead ends: 110 [2018-11-18 12:32:03,745 INFO L226 Difference]: Without dead ends: 109 [2018-11-18 12:32:03,746 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 169 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 12:32:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-18 12:32:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2018-11-18 12:32:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-11-18 12:32:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-11-18 12:32:03,751 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 100 [2018-11-18 12:32:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:03,751 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-11-18 12:32:03,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:32:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-11-18 12:32:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-18 12:32:03,752 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:03,752 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:03,752 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:03,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1920279765, now seen corresponding path program 16 times [2018-11-18 12:32:03,752 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:03,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:03,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:32:03,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:03,753 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:03,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:03,903 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:03,903 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:03,903 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:03,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:03,904 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:03,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:03,915 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:32:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:03,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:04,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:04,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:04,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2018-11-18 12:32:04,442 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:04,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 12:32:04,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 12:32:04,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 12:32:04,443 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 19 states. [2018-11-18 12:32:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:04,483 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-11-18 12:32:04,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 12:32:04,484 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2018-11-18 12:32:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:04,485 INFO L225 Difference]: With dead ends: 114 [2018-11-18 12:32:04,485 INFO L226 Difference]: Without dead ends: 113 [2018-11-18 12:32:04,485 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 12:32:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-18 12:32:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-11-18 12:32:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-18 12:32:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-11-18 12:32:04,488 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 104 [2018-11-18 12:32:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:04,488 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-11-18 12:32:04,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 12:32:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-11-18 12:32:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-11-18 12:32:04,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:04,489 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:04,489 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:04,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1447084653, now seen corresponding path program 16 times [2018-11-18 12:32:04,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:04,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:04,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:04,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:04,490 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:04,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:04,604 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:04,604 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:04,604 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:04,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:04,604 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:04,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:04,613 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:32:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:04,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:04,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:05,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:05,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2018-11-18 12:32:05,216 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:05,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 12:32:05,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 12:32:05,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 12:32:05,216 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 19 states. [2018-11-18 12:32:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:05,248 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-11-18 12:32:05,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 12:32:05,249 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2018-11-18 12:32:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:05,249 INFO L225 Difference]: With dead ends: 116 [2018-11-18 12:32:05,250 INFO L226 Difference]: Without dead ends: 115 [2018-11-18 12:32:05,250 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 179 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 12:32:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-18 12:32:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2018-11-18 12:32:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-18 12:32:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-11-18 12:32:05,253 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 106 [2018-11-18 12:32:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:05,253 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-11-18 12:32:05,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 12:32:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-11-18 12:32:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-18 12:32:05,254 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:05,254 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:05,254 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:05,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:05,254 INFO L82 PathProgramCache]: Analyzing trace with hash -366478495, now seen corresponding path program 17 times [2018-11-18 12:32:05,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:05,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:05,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:05,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:05,256 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:05,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:05,408 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:05,408 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:05,408 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:05,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:05,408 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:05,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:32:05,416 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:32:05,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-18 12:32:05,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:32:05,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:05,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:05,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:05,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-11-18 12:32:05,825 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:05,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 12:32:05,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 12:32:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 12:32:05,826 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 20 states. [2018-11-18 12:32:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:05,868 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-11-18 12:32:05,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 12:32:05,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2018-11-18 12:32:05,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:05,869 INFO L225 Difference]: With dead ends: 120 [2018-11-18 12:32:05,869 INFO L226 Difference]: Without dead ends: 119 [2018-11-18 12:32:05,869 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 185 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 12:32:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-18 12:32:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-11-18 12:32:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-18 12:32:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-11-18 12:32:05,871 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 110 [2018-11-18 12:32:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:05,871 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-11-18 12:32:05,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 12:32:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-11-18 12:32:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-11-18 12:32:05,872 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:05,872 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:05,872 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:05,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:05,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1486115, now seen corresponding path program 17 times [2018-11-18 12:32:05,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:05,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:05,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:32:05,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:05,873 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:06,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:06,010 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:06,010 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:06,010 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:06,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:06,010 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:06,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:32:06,017 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:32:06,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-18 12:32:06,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:32:06,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:06,205 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:06,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:06,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-11-18 12:32:06,741 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:06,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 12:32:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 12:32:06,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 12:32:06,742 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 20 states. [2018-11-18 12:32:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:06,782 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-11-18 12:32:06,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 12:32:06,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2018-11-18 12:32:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:06,783 INFO L225 Difference]: With dead ends: 122 [2018-11-18 12:32:06,783 INFO L226 Difference]: Without dead ends: 121 [2018-11-18 12:32:06,783 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 189 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 12:32:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-11-18 12:32:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2018-11-18 12:32:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-11-18 12:32:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-11-18 12:32:06,785 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 112 [2018-11-18 12:32:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:06,785 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-11-18 12:32:06,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 12:32:06,785 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-11-18 12:32:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-18 12:32:06,785 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:06,785 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:06,785 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:06,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1929536745, now seen corresponding path program 18 times [2018-11-18 12:32:06,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:06,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:06,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:32:06,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:06,786 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:06,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:06,916 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:06,916 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:06,916 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:06,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:06,916 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:06,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:32:06,923 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:32:06,935 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:32:06,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:32:06,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:07,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:07,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:07,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2018-11-18 12:32:07,354 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:07,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 12:32:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 12:32:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 12:32:07,354 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 21 states. [2018-11-18 12:32:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:07,393 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-11-18 12:32:07,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 12:32:07,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2018-11-18 12:32:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:07,394 INFO L225 Difference]: With dead ends: 126 [2018-11-18 12:32:07,394 INFO L226 Difference]: Without dead ends: 125 [2018-11-18 12:32:07,394 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 195 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 12:32:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-18 12:32:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2018-11-18 12:32:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-18 12:32:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-11-18 12:32:07,396 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 116 [2018-11-18 12:32:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:07,397 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-11-18 12:32:07,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 12:32:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-11-18 12:32:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-18 12:32:07,397 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:07,398 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:07,398 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:07,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:07,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1141061465, now seen corresponding path program 18 times [2018-11-18 12:32:07,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:07,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:07,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:32:07,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:07,399 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:07,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:07,547 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:07,547 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:07,547 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:07,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:07,547 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:07,556 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:32:07,556 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 12:32:07,567 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:32:07,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:32:07,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:07,747 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:08,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:08,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 38 [2018-11-18 12:32:08,242 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:08,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 12:32:08,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 12:32:08,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-18 12:32:08,243 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 21 states. [2018-11-18 12:32:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:08,285 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-11-18 12:32:08,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 12:32:08,285 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 118 [2018-11-18 12:32:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:08,286 INFO L225 Difference]: With dead ends: 128 [2018-11-18 12:32:08,286 INFO L226 Difference]: Without dead ends: 127 [2018-11-18 12:32:08,286 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 199 SyntacticMatches, 19 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-18 12:32:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-18 12:32:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2018-11-18 12:32:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-11-18 12:32:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-11-18 12:32:08,288 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 118 [2018-11-18 12:32:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:08,288 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-11-18 12:32:08,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 12:32:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-11-18 12:32:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-18 12:32:08,289 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:08,289 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:08,289 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:08,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:08,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1769072051, now seen corresponding path program 19 times [2018-11-18 12:32:08,289 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:08,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:08,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:32:08,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:08,290 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:08,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:08,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:32:08,421 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:32:08,421 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:32:08,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:32:08,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:32:08,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:08,429 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:32:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:32:08,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:32:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:08,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:32:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:32:08,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:32:08,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2018-11-18 12:32:08,944 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:32:08,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 12:32:08,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 12:32:08,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 12:32:08,945 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 22 states. [2018-11-18 12:32:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:32:08,989 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-11-18 12:32:08,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 12:32:08,989 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 122 [2018-11-18 12:32:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:32:08,990 INFO L225 Difference]: With dead ends: 132 [2018-11-18 12:32:08,990 INFO L226 Difference]: Without dead ends: 131 [2018-11-18 12:32:08,990 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 205 SyntacticMatches, 19 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 12:32:08,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-11-18 12:32:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2018-11-18 12:32:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-18 12:32:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-11-18 12:32:08,994 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 122 [2018-11-18 12:32:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:32:08,994 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-11-18 12:32:08,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 12:32:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-11-18 12:32:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-18 12:32:08,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:32:08,995 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-11-18 12:32:08,995 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:32:08,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:32:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash 728809743, now seen corresponding path program 19 times [2018-11-18 12:32:08,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:32:08,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:08,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:32:08,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:32:08,996 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:32:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:32:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:32:09,023 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 12:32:09,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:32:09 BoogieIcfgContainer [2018-11-18 12:32:09,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:32:09,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:32:09,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:32:09,048 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:32:09,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:31:40" (3/4) ... [2018-11-18 12:32:09,051 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 12:32:09,094 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f41c92e0-d61d-406b-ac60-051e01c2c079/bin-2019/utaipan/witness.graphml [2018-11-18 12:32:09,094 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:32:09,095 INFO L168 Benchmark]: Toolchain (without parser) took 28860.55 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 483.9 MB). Free memory was 953.8 MB in the beginning and 1.4 GB in the end (delta: -406.3 MB). Peak memory consumption was 77.6 MB. Max. memory is 11.5 GB. [2018-11-18 12:32:09,097 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:32:09,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.92 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:32:09,098 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.91 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:32:09,098 INFO L168 Benchmark]: Boogie Preprocessor took 12.58 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:32:09,098 INFO L168 Benchmark]: RCFGBuilder took 169.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -197.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 12:32:09,098 INFO L168 Benchmark]: TraceAbstraction took 28464.88 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 330.3 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -235.0 MB). Peak memory consumption was 95.3 MB. Max. memory is 11.5 GB. [2018-11-18 12:32:09,099 INFO L168 Benchmark]: Witness Printer took 46.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2018-11-18 12:32:09,100 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.92 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 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 12.91 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.58 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 169.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -197.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28464.88 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 330.3 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -235.0 MB). Peak memory consumption was 95.3 MB. Max. memory is 11.5 GB. * Witness Printer took 46.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y; [L16] x = 1 [L17] y = 1 VAL [x=1, y=1] [L18] COND TRUE x >= 0 VAL [x=1, y=1] [L19] EXPR 2*x [L19] x = 2*x VAL [x=2, y=1] [L20] EXPR 3*y [L20] y = 3*y VAL [x=2, y=3] [L18] COND TRUE x >= 0 VAL [x=2, y=3] [L19] EXPR 2*x [L19] x = 2*x VAL [x=4, y=3] [L20] EXPR 3*y [L20] y = 3*y VAL [x=4, y=9] [L18] COND TRUE x >= 0 VAL [x=4, y=9] [L19] EXPR 2*x [L19] x = 2*x VAL [x=8, y=9] [L20] EXPR 3*y [L20] y = 3*y VAL [x=8, y=27] [L18] COND TRUE x >= 0 VAL [x=8, y=27] [L19] EXPR 2*x [L19] x = 2*x VAL [x=16, y=27] [L20] EXPR 3*y [L20] y = 3*y VAL [x=16, y=81] [L18] COND TRUE x >= 0 VAL [x=16, y=81] [L19] EXPR 2*x [L19] x = 2*x VAL [x=32, y=81] [L20] EXPR 3*y [L20] y = 3*y VAL [x=32, y=243] [L18] COND TRUE x >= 0 VAL [x=32, y=243] [L19] EXPR 2*x [L19] x = 2*x VAL [x=64, y=243] [L20] EXPR 3*y [L20] y = 3*y VAL [x=64, y=729] [L18] COND TRUE x >= 0 VAL [x=64, y=729] [L19] EXPR 2*x [L19] x = 2*x VAL [x=128, y=729] [L20] EXPR 3*y [L20] y = 3*y VAL [x=128, y=2187] [L18] COND TRUE x >= 0 VAL [x=128, y=2187] [L19] EXPR 2*x [L19] x = 2*x VAL [x=256, y=2187] [L20] EXPR 3*y [L20] y = 3*y VAL [x=256, y=6561] [L18] COND TRUE x >= 0 VAL [x=256, y=6561] [L19] EXPR 2*x [L19] x = 2*x VAL [x=512, y=6561] [L20] EXPR 3*y [L20] y = 3*y VAL [x=512, y=19683] [L18] COND TRUE x >= 0 VAL [x=512, y=19683] [L19] EXPR 2*x [L19] x = 2*x VAL [x=1024, y=19683] [L20] EXPR 3*y [L20] y = 3*y VAL [x=1024, y=59049] [L18] COND TRUE x >= 0 VAL [x=1024, y=59049] [L19] EXPR 2*x [L19] x = 2*x VAL [x=2048, y=59049] [L20] EXPR 3*y [L20] y = 3*y VAL [x=2048, y=177147] [L18] COND TRUE x >= 0 VAL [x=2048, y=177147] [L19] EXPR 2*x [L19] x = 2*x VAL [x=4096, y=177147] [L20] EXPR 3*y [L20] y = 3*y VAL [x=4096, y=531441] [L18] COND TRUE x >= 0 VAL [x=4096, y=531441] [L19] EXPR 2*x [L19] x = 2*x VAL [x=8192, y=531441] [L20] EXPR 3*y [L20] y = 3*y VAL [x=8192, y=1594323] [L18] COND TRUE x >= 0 VAL [x=8192, y=1594323] [L19] EXPR 2*x [L19] x = 2*x VAL [x=16384, y=1594323] [L20] EXPR 3*y [L20] y = 3*y VAL [x=16384, y=4782969] [L18] COND TRUE x >= 0 VAL [x=16384, y=4782969] [L19] EXPR 2*x [L19] x = 2*x VAL [x=32768, y=4782969] [L20] EXPR 3*y [L20] y = 3*y VAL [x=32768, y=14348907] [L18] COND TRUE x >= 0 VAL [x=32768, y=14348907] [L19] EXPR 2*x [L19] x = 2*x VAL [x=65536, y=14348907] [L20] EXPR 3*y [L20] y = 3*y VAL [x=65536, y=43046721] [L18] COND TRUE x >= 0 VAL [x=65536, y=43046721] [L19] EXPR 2*x [L19] x = 2*x VAL [x=131072, y=43046721] [L20] EXPR 3*y [L20] y = 3*y VAL [x=131072, y=129140163] [L18] COND TRUE x >= 0 VAL [x=131072, y=129140163] [L19] EXPR 2*x [L19] x = 2*x VAL [x=262144, y=129140163] [L20] EXPR 3*y [L20] y = 3*y VAL [x=262144, y=387420489] [L18] COND TRUE x >= 0 VAL [x=262144, y=387420489] [L19] EXPR 2*x [L19] x = 2*x VAL [x=524288, y=387420489] [L20] EXPR 3*y [L20] y = 3*y VAL [x=524288, y=1162261467] [L18] COND TRUE x >= 0 VAL [x=524288, y=1162261467] [L19] EXPR 2*x [L19] x = 2*x VAL [x=1048576, y=1162261467] [L20] 3*y VAL [x=1048576, y=1162261467] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 4 error locations. UNSAFE Result, 28.4s OverallTime, 42 OverallIterations, 20 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 434 SDtfs, 412 SDslu, 3061 SDs, 0 SdLazy, 1450 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5402 GetRequests, 4241 SyntacticMatches, 362 SemanticMatches, 799 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5726 ImplicationChecksByTransitivity, 22.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 41 MinimizatonAttempts, 39 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 24.8s InterpolantComputationTime, 5158 NumberOfCodeBlocks, 5158 NumberOfCodeBlocksAsserted, 205 NumberOfCheckSat, 7417 ConstructedInterpolants, 1020 QuantifiedInterpolants, 5373757 SizeOfPredicates, 0 NumberOfNonLiveVariables, 4311 ConjunctsInSsa, 435 ConjunctsInUnsatCore, 115 InterpolantComputations, 4 PerfectInterpolantSequences, 0/42237 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...