./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 d28857c86a3c83fc75b1b8cf8125f1c52a370911 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 01:30:21,539 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 01:30:21,540 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 01:30:21,548 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 01:30:21,549 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 01:30:21,549 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 01:30:21,550 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 01:30:21,551 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 01:30:21,552 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 01:30:21,553 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 01:30:21,554 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 01:30:21,554 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 01:30:21,554 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 01:30:21,555 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 01:30:21,555 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 01:30:21,556 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 01:30:21,556 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 01:30:21,557 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 01:30:21,558 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 01:30:21,559 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 01:30:21,559 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 01:30:21,560 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 01:30:21,561 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 01:30:21,561 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 01:30:21,561 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 01:30:21,562 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 01:30:21,562 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 01:30:21,562 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 01:30:21,563 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 01:30:21,563 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 01:30:21,563 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 01:30:21,564 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 01:30:21,564 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 01:30:21,564 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 01:30:21,564 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 01:30:21,565 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 01:30:21,565 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-12-02 01:30:21,571 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 01:30:21,572 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 01:30:21,572 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 01:30:21,572 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 01:30:21,572 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 01:30:21,572 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 01:30:21,573 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 01:30:21,573 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 01:30:21,573 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 01:30:21,573 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 01:30:21,573 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 01:30:21,573 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 01:30:21,573 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 01:30:21,573 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 01:30:21,573 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 01:30:21,574 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 01:30:21,574 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 01:30:21,574 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 01:30:21,574 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 01:30:21,574 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 01:30:21,574 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-02 01:30:21,574 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 01:30:21,574 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 01:30:21,574 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 01:30:21,575 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 01:30:21,575 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 01:30:21,575 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 01:30:21,575 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 01:30:21,575 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 01:30:21,575 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 01:30:21,575 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 01:30:21,575 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 01:30:21,576 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 01:30:21,576 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 01:30:21,576 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 01:30:21,576 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_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 -> d28857c86a3c83fc75b1b8cf8125f1c52a370911 [2018-12-02 01:30:21,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 01:30:21,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 01:30:21,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 01:30:21,606 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 01:30:21,606 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 01:30:21,607 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/../../sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c [2018-12-02 01:30:21,649 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/data/5bd2d25a5/791ec70ad1dc44e58a57aaab1a3d9711/FLAGff62ff626 [2018-12-02 01:30:22,033 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 01:30:22,034 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/sv-benchmarks/c/termination-numeric/java_LogBuiltIn_true-termination_true-no-overflow.c [2018-12-02 01:30:22,037 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/data/5bd2d25a5/791ec70ad1dc44e58a57aaab1a3d9711/FLAGff62ff626 [2018-12-02 01:30:22,045 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/data/5bd2d25a5/791ec70ad1dc44e58a57aaab1a3d9711 [2018-12-02 01:30:22,046 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 01:30:22,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 01:30:22,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 01:30:22,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 01:30:22,050 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 01:30:22,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73973e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22, skipping insertion in model container [2018-12-02 01:30:22,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 01:30:22,064 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 01:30:22,145 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:30:22,147 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 01:30:22,155 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:30:22,163 INFO L195 MainTranslator]: Completed translation [2018-12-02 01:30:22,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22 WrapperNode [2018-12-02 01:30:22,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 01:30:22,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 01:30:22,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 01:30:22,164 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 01:30:22,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 01:30:22,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 01:30:22,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 01:30:22,174 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 01:30:22,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... [2018-12-02 01:30:22,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 01:30:22,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 01:30:22,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 01:30:22,186 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 01:30:22,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 01:30:22,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 01:30:22,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 01:30:22,249 INFO L130 BoogieDeclarations]: Found specification of procedure mlog [2018-12-02 01:30:22,249 INFO L138 BoogieDeclarations]: Found implementation of procedure mlog [2018-12-02 01:30:22,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 01:30:22,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 01:30:22,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 01:30:22,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 01:30:22,339 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 01:30:22,339 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 01:30:22,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:30:22 BoogieIcfgContainer [2018-12-02 01:30:22,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 01:30:22,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 01:30:22,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 01:30:22,342 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 01:30:22,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:30:22" (1/3) ... [2018-12-02 01:30:22,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b5e198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:30:22, skipping insertion in model container [2018-12-02 01:30:22,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:30:22" (2/3) ... [2018-12-02 01:30:22,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b5e198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:30:22, skipping insertion in model container [2018-12-02 01:30:22,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:30:22" (3/3) ... [2018-12-02 01:30:22,343 INFO L112 eAbstractionObserver]: Analyzing ICFG java_LogBuiltIn_true-termination_true-no-overflow.c [2018-12-02 01:30:22,349 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 01:30:22,353 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-12-02 01:30:22,361 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-12-02 01:30:22,379 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 01:30:22,379 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 01:30:22,379 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 01:30:22,379 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 01:30:22,379 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 01:30:22,379 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 01:30:22,380 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 01:30:22,380 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 01:30:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-02 01:30:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-02 01:30:22,393 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:22,393 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:22,394 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:22,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1086939273, now seen corresponding path program 1 times [2018-12-02 01:30:22,399 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:22,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:22,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:22,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:22,426 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:22,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:30:22,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 01:30:22,504 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:30:22,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 01:30:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 01:30:22,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:30:22,516 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2018-12-02 01:30:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:22,575 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-12-02 01:30:22,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 01:30:22,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-12-02 01:30:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:22,582 INFO L225 Difference]: With dead ends: 32 [2018-12-02 01:30:22,583 INFO L226 Difference]: Without dead ends: 14 [2018-12-02 01:30:22,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-02 01:30:22,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-02 01:30:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-02 01:30:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-02 01:30:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-12-02 01:30:22,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2018-12-02 01:30:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:22,604 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-12-02 01:30:22,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 01:30:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-12-02 01:30:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-02 01:30:22,605 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:22,605 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:22,605 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:22,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash -871587015, now seen corresponding path program 1 times [2018-12-02 01:30:22,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:22,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:22,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:22,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:22,607 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:22,638 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:30:22,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 01:30:22,639 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:30:22,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 01:30:22,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 01:30:22,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 01:30:22,640 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-12-02 01:30:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:22,667 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-12-02 01:30:22,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 01:30:22,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-12-02 01:30:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:22,668 INFO L225 Difference]: With dead ends: 21 [2018-12-02 01:30:22,668 INFO L226 Difference]: Without dead ends: 20 [2018-12-02 01:30:22,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:30:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-02 01:30:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2018-12-02 01:30:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-02 01:30:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-12-02 01:30:22,671 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2018-12-02 01:30:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:22,671 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-12-02 01:30:22,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 01:30:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-12-02 01:30:22,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-02 01:30:22,672 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:22,672 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:22,672 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:22,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1249393641, now seen corresponding path program 1 times [2018-12-02 01:30:22,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:22,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:22,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:22,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:22,673 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:22,693 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:30:22,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 01:30:22,693 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:30:22,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 01:30:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 01:30:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 01:30:22,693 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 4 states. [2018-12-02 01:30:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:22,707 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-12-02 01:30:22,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 01:30:22,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-02 01:30:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:22,708 INFO L225 Difference]: With dead ends: 18 [2018-12-02 01:30:22,708 INFO L226 Difference]: Without dead ends: 17 [2018-12-02 01:30:22,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:30:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-02 01:30:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-02 01:30:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-02 01:30:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-02 01:30:22,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2018-12-02 01:30:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:22,712 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-02 01:30:22,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 01:30:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-02 01:30:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-02 01:30:22,712 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:22,712 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:22,713 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:22,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1700573851, now seen corresponding path program 1 times [2018-12-02 01:30:22,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:22,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:22,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:22,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:22,714 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:22,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:22,758 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:22,759 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-12-02 01:30:22,760 INFO L205 CegarAbsIntRunner]: [0], [1], [10], [12], [14], [15], [16], [18], [27], [31], [32], [33], [35] [2018-12-02 01:30:22,785 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 01:30:22,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 01:30:22,944 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 01:30:22,945 INFO L272 AbstractInterpreter]: Visited 13 different actions 37 times. Merged at 6 different actions 22 times. Never widened. Performed 150 root evaluator evaluations with a maximum evaluation depth of 8. Performed 150 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-12-02 01:30:22,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:22,956 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 01:30:22,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:22,956 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:30:22,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:22,962 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:22,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:22,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:23,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-02 01:30:23,030 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:23,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 01:30:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 01:30:23,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-12-02 01:30:23,031 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-12-02 01:30:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:23,052 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-12-02 01:30:23,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 01:30:23,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-12-02 01:30:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:23,053 INFO L225 Difference]: With dead ends: 24 [2018-12-02 01:30:23,053 INFO L226 Difference]: Without dead ends: 23 [2018-12-02 01:30:23,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-12-02 01:30:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-02 01:30:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-12-02 01:30:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-02 01:30:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-12-02 01:30:23,055 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2018-12-02 01:30:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:23,055 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-12-02 01:30:23,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 01:30:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-12-02 01:30:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-02 01:30:23,056 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:23,056 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:23,056 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:23,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:23,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1576595577, now seen corresponding path program 2 times [2018-12-02 01:30:23,057 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:23,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:23,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:23,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:23,057 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:23,096 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:23,096 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:23,096 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:23,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:23,096 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:30:23,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:23,102 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:23,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 01:30:23,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:23,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:23,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-02 01:30:23,190 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:23,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 01:30:23,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 01:30:23,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-12-02 01:30:23,190 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-12-02 01:30:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:23,228 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-12-02 01:30:23,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 01:30:23,228 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-12-02 01:30:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:23,229 INFO L225 Difference]: With dead ends: 29 [2018-12-02 01:30:23,229 INFO L226 Difference]: Without dead ends: 28 [2018-12-02 01:30:23,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-02 01:30:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-02 01:30:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-12-02 01:30:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 01:30:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-02 01:30:23,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2018-12-02 01:30:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:23,234 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-02 01:30:23,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 01:30:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-02 01:30:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-02 01:30:23,235 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:23,235 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:23,235 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:23,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:23,235 INFO L82 PathProgramCache]: Analyzing trace with hash -112284325, now seen corresponding path program 3 times [2018-12-02 01:30:23,235 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:23,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:23,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:23,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:23,237 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:23,302 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:23,302 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:23,302 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:23,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:23,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:30:23,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:23,314 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:23,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:23,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:23,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:23,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-02 01:30:23,433 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:23,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 01:30:23,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 01:30:23,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-12-02 01:30:23,434 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2018-12-02 01:30:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:23,476 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-12-02 01:30:23,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 01:30:23,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-12-02 01:30:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:23,477 INFO L225 Difference]: With dead ends: 34 [2018-12-02 01:30:23,477 INFO L226 Difference]: Without dead ends: 33 [2018-12-02 01:30:23,477 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2018-12-02 01:30:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-02 01:30:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-12-02 01:30:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 01:30:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-12-02 01:30:23,480 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2018-12-02 01:30:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:23,480 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-12-02 01:30:23,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 01:30:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-12-02 01:30:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-02 01:30:23,481 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:23,481 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:23,482 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:23,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:23,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2077601209, now seen corresponding path program 4 times [2018-12-02 01:30:23,482 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:23,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:23,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:23,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:23,483 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:23,569 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:23,569 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:23,569 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:23,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:23,569 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:30:23,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:23,575 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:23,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,591 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:23,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-12-02 01:30:23,696 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:23,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 01:30:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 01:30:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-12-02 01:30:23,698 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2018-12-02 01:30:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:23,758 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-12-02 01:30:23,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 01:30:23,758 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-12-02 01:30:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:23,758 INFO L225 Difference]: With dead ends: 39 [2018-12-02 01:30:23,758 INFO L226 Difference]: Without dead ends: 38 [2018-12-02 01:30:23,759 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2018-12-02 01:30:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-02 01:30:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-12-02 01:30:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-02 01:30:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-12-02 01:30:23,761 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2018-12-02 01:30:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:23,762 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-12-02 01:30:23,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 01:30:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-12-02 01:30:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-02 01:30:23,762 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:23,762 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:23,762 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:23,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:23,762 INFO L82 PathProgramCache]: Analyzing trace with hash 370554907, now seen corresponding path program 5 times [2018-12-02 01:30:23,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:23,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:23,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:23,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:23,763 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:23,855 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:23,855 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:23,855 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:23,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:23,855 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:30:23,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:23,860 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:23,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-02 01:30:23,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:23,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:23,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:24,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-12-02 01:30:24,003 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:24,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-02 01:30:24,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 01:30:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-12-02 01:30:24,003 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 14 states. [2018-12-02 01:30:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:24,060 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-12-02 01:30:24,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 01:30:24,060 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-12-02 01:30:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:24,061 INFO L225 Difference]: With dead ends: 44 [2018-12-02 01:30:24,061 INFO L226 Difference]: Without dead ends: 43 [2018-12-02 01:30:24,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2018-12-02 01:30:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-02 01:30:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-12-02 01:30:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-02 01:30:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-12-02 01:30:24,064 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2018-12-02 01:30:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:24,064 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-12-02 01:30:24,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-02 01:30:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-12-02 01:30:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-02 01:30:24,065 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:24,065 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:24,065 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:24,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:24,066 INFO L82 PathProgramCache]: Analyzing trace with hash 131521273, now seen corresponding path program 6 times [2018-12-02 01:30:24,066 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:24,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:24,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:24,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:24,067 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:24,154 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:24,154 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:24,155 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:24,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:24,155 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:24,160 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:24,160 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:24,170 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:24,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:24,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,176 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:24,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-12-02 01:30:24,328 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:24,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-02 01:30:24,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-02 01:30:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-12-02 01:30:24,329 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 16 states. [2018-12-02 01:30:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:24,396 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-12-02 01:30:24,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 01:30:24,397 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2018-12-02 01:30:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:24,397 INFO L225 Difference]: With dead ends: 49 [2018-12-02 01:30:24,397 INFO L226 Difference]: Without dead ends: 48 [2018-12-02 01:30:24,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=904, Unknown=0, NotChecked=0, Total=1332 [2018-12-02 01:30:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-02 01:30:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-12-02 01:30:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-02 01:30:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-12-02 01:30:24,400 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2018-12-02 01:30:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:24,400 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-12-02 01:30:24,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-02 01:30:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-12-02 01:30:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-02 01:30:24,401 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:24,401 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:24,401 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:24,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:24,402 INFO L82 PathProgramCache]: Analyzing trace with hash 436163291, now seen corresponding path program 7 times [2018-12-02 01:30:24,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:24,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:24,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:24,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:24,402 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:24,524 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:24,524 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:24,524 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:24,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:24,524 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:24,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:24,530 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:24,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:24,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-12-02 01:30:24,718 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:24,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-02 01:30:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-02 01:30:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-12-02 01:30:24,719 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 18 states. [2018-12-02 01:30:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:24,789 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-12-02 01:30:24,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-02 01:30:24,789 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-12-02 01:30:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:24,789 INFO L225 Difference]: With dead ends: 54 [2018-12-02 01:30:24,789 INFO L226 Difference]: Without dead ends: 53 [2018-12-02 01:30:24,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2018-12-02 01:30:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-02 01:30:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-12-02 01:30:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-02 01:30:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-12-02 01:30:24,793 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2018-12-02 01:30:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:24,793 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-12-02 01:30:24,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-02 01:30:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-12-02 01:30:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-02 01:30:24,793 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:24,793 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:24,794 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:24,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1288669127, now seen corresponding path program 8 times [2018-12-02 01:30:24,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:24,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:24,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:24,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:24,794 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:24,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:24,924 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:24,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:24,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:24,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:24,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:24,931 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:24,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-02 01:30:24,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:24,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:24,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:25,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:25,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-12-02 01:30:25,188 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:25,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-02 01:30:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-02 01:30:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-12-02 01:30:25,189 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 20 states. [2018-12-02 01:30:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:25,265 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-12-02 01:30:25,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-02 01:30:25,266 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2018-12-02 01:30:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:25,266 INFO L225 Difference]: With dead ends: 59 [2018-12-02 01:30:25,266 INFO L226 Difference]: Without dead ends: 58 [2018-12-02 01:30:25,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=685, Invalid=1477, Unknown=0, NotChecked=0, Total=2162 [2018-12-02 01:30:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-02 01:30:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-12-02 01:30:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-02 01:30:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-12-02 01:30:25,269 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2018-12-02 01:30:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:25,269 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-12-02 01:30:25,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-02 01:30:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-12-02 01:30:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-02 01:30:25,270 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:25,270 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:25,270 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:25,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash -195691109, now seen corresponding path program 9 times [2018-12-02 01:30:25,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:25,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:25,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:25,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:25,271 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:25,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:25,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:25,392 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:25,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:25,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:25,393 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:25,398 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:25,398 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:25,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:25,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:25,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:25,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:25,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:25,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2018-12-02 01:30:25,698 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:25,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-02 01:30:25,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-02 01:30:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-12-02 01:30:25,699 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 22 states. [2018-12-02 01:30:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:25,788 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-12-02 01:30:25,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-02 01:30:25,789 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2018-12-02 01:30:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:25,789 INFO L225 Difference]: With dead ends: 64 [2018-12-02 01:30:25,789 INFO L226 Difference]: Without dead ends: 63 [2018-12-02 01:30:25,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=836, Invalid=1816, Unknown=0, NotChecked=0, Total=2652 [2018-12-02 01:30:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-02 01:30:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-12-02 01:30:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-02 01:30:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-12-02 01:30:25,792 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2018-12-02 01:30:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:25,793 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-12-02 01:30:25,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-02 01:30:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-12-02 01:30:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-02 01:30:25,793 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:25,793 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:25,793 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:25,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:25,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1041663353, now seen corresponding path program 10 times [2018-12-02 01:30:25,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:25,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:25,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:25,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:25,794 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:25,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:25,940 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:25,940 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:25,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:25,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:25,940 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:25,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:25,947 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:25,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:25,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:26,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:26,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2018-12-02 01:30:26,246 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:26,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-02 01:30:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-02 01:30:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-12-02 01:30:26,246 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 24 states. [2018-12-02 01:30:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:26,371 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-12-02 01:30:26,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-02 01:30:26,371 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2018-12-02 01:30:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:26,372 INFO L225 Difference]: With dead ends: 69 [2018-12-02 01:30:26,372 INFO L226 Difference]: Without dead ends: 68 [2018-12-02 01:30:26,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1002, Invalid=2190, Unknown=0, NotChecked=0, Total=3192 [2018-12-02 01:30:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-02 01:30:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2018-12-02 01:30:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-02 01:30:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-12-02 01:30:26,375 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2018-12-02 01:30:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:26,375 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-12-02 01:30:26,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-02 01:30:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-12-02 01:30:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-12-02 01:30:26,376 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:26,376 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:26,376 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:26,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -446285733, now seen corresponding path program 11 times [2018-12-02 01:30:26,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:26,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:26,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:26,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:26,377 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:26,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:26,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:26,542 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:26,542 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:26,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:26,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:26,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:26,552 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:26,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-02 01:30:26,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:26,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:26,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:26,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:26,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2018-12-02 01:30:26,930 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:26,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-02 01:30:26,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-02 01:30:26,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-12-02 01:30:26,931 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 26 states. [2018-12-02 01:30:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:27,060 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-12-02 01:30:27,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-02 01:30:27,061 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2018-12-02 01:30:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:27,061 INFO L225 Difference]: With dead ends: 74 [2018-12-02 01:30:27,061 INFO L226 Difference]: Without dead ends: 73 [2018-12-02 01:30:27,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1183, Invalid=2599, Unknown=0, NotChecked=0, Total=3782 [2018-12-02 01:30:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-02 01:30:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-12-02 01:30:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-02 01:30:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-12-02 01:30:27,065 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2018-12-02 01:30:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:27,066 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-12-02 01:30:27,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-02 01:30:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-12-02 01:30:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-02 01:30:27,066 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:27,066 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:27,067 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:27,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1212349767, now seen corresponding path program 12 times [2018-12-02 01:30:27,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:27,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:27,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:27,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:27,068 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:27,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:27,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:27,257 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:27,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:27,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:27,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:27,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:27,263 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:27,280 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:27,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:27,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:27,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:27,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:27,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2018-12-02 01:30:27,672 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:27,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-02 01:30:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-02 01:30:27,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-12-02 01:30:27,672 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 28 states. [2018-12-02 01:30:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:27,834 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-12-02 01:30:27,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-02 01:30:27,834 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2018-12-02 01:30:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:27,834 INFO L225 Difference]: With dead ends: 79 [2018-12-02 01:30:27,835 INFO L226 Difference]: Without dead ends: 78 [2018-12-02 01:30:27,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1379, Invalid=3043, Unknown=0, NotChecked=0, Total=4422 [2018-12-02 01:30:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-02 01:30:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-12-02 01:30:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-02 01:30:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-12-02 01:30:27,839 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2018-12-02 01:30:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:27,840 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-12-02 01:30:27,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-02 01:30:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-12-02 01:30:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-12-02 01:30:27,840 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:27,840 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:27,841 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:27,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1048314651, now seen corresponding path program 13 times [2018-12-02 01:30:27,841 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:27,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:27,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:27,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:27,842 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:28,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:28,032 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:28,032 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:28,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:28,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:28,032 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:28,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:28,038 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:28,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:28,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:28,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:28,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2018-12-02 01:30:28,476 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:28,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-02 01:30:28,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-02 01:30:28,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-12-02 01:30:28,477 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 30 states. [2018-12-02 01:30:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:28,642 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-12-02 01:30:28,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-02 01:30:28,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 76 [2018-12-02 01:30:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:28,643 INFO L225 Difference]: With dead ends: 84 [2018-12-02 01:30:28,643 INFO L226 Difference]: Without dead ends: 83 [2018-12-02 01:30:28,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2018-12-02 01:30:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-02 01:30:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-12-02 01:30:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-02 01:30:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-12-02 01:30:28,646 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2018-12-02 01:30:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:28,647 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-12-02 01:30:28,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-02 01:30:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-12-02 01:30:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-02 01:30:28,647 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:28,647 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:28,647 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:28,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1101533191, now seen corresponding path program 14 times [2018-12-02 01:30:28,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:28,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:28,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:28,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:28,648 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:28,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:28,851 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:28,851 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:28,851 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:28,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:28,851 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:28,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:28,857 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:28,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-02 01:30:28,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:28,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:28,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:29,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:29,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2018-12-02 01:30:29,347 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:29,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-02 01:30:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-02 01:30:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-12-02 01:30:29,348 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 32 states. [2018-12-02 01:30:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:29,503 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-12-02 01:30:29,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-02 01:30:29,503 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 81 [2018-12-02 01:30:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:29,503 INFO L225 Difference]: With dead ends: 89 [2018-12-02 01:30:29,504 INFO L226 Difference]: Without dead ends: 88 [2018-12-02 01:30:29,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1816, Invalid=4036, Unknown=0, NotChecked=0, Total=5852 [2018-12-02 01:30:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-02 01:30:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2018-12-02 01:30:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-02 01:30:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-12-02 01:30:29,507 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2018-12-02 01:30:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:29,507 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-12-02 01:30:29,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-02 01:30:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-12-02 01:30:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-12-02 01:30:29,508 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:29,508 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:29,509 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:29,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash 568548827, now seen corresponding path program 15 times [2018-12-02 01:30:29,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:29,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:29,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:29,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:29,510 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:29,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:29,763 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:29,764 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:29,764 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:29,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:29,764 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:29,770 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:29,770 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:29,785 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:29,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:29,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:29,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:30,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:30,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2018-12-02 01:30:30,311 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:30,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-02 01:30:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-02 01:30:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-12-02 01:30:30,312 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 34 states. [2018-12-02 01:30:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:30,484 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-12-02 01:30:30,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-02 01:30:30,484 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 86 [2018-12-02 01:30:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:30,485 INFO L225 Difference]: With dead ends: 94 [2018-12-02 01:30:30,485 INFO L226 Difference]: Without dead ends: 93 [2018-12-02 01:30:30,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2057, Invalid=4585, Unknown=0, NotChecked=0, Total=6642 [2018-12-02 01:30:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-02 01:30:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-12-02 01:30:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-02 01:30:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-12-02 01:30:30,488 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2018-12-02 01:30:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:30,488 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-12-02 01:30:30,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-02 01:30:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-12-02 01:30:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-12-02 01:30:30,489 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:30,489 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:30,489 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:30,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1088729799, now seen corresponding path program 16 times [2018-12-02 01:30:30,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:30,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:30,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:30,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:30,490 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:30,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:30,743 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:30,743 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:30,743 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:30,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:30,743 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:30,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:30,749 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:30,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:30,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:31,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:31,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2018-12-02 01:30:31,347 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:31,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-02 01:30:31,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-02 01:30:31,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-12-02 01:30:31,348 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 36 states. [2018-12-02 01:30:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:31,551 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-12-02 01:30:31,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-02 01:30:31,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 91 [2018-12-02 01:30:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:31,551 INFO L225 Difference]: With dead ends: 99 [2018-12-02 01:30:31,552 INFO L226 Difference]: Without dead ends: 98 [2018-12-02 01:30:31,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2313, Invalid=5169, Unknown=0, NotChecked=0, Total=7482 [2018-12-02 01:30:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-12-02 01:30:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-12-02 01:30:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-02 01:30:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-12-02 01:30:31,554 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2018-12-02 01:30:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:31,555 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-12-02 01:30:31,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-02 01:30:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-12-02 01:30:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-02 01:30:31,555 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:31,555 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:31,556 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:31,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1122519195, now seen corresponding path program 17 times [2018-12-02 01:30:31,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:31,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:31,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:31,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:31,557 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:31,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:31,858 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:31,858 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:31,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:31,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:31,858 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:31,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:31,864 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:31,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-02 01:30:31,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:31,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:31,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:32,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:32,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2018-12-02 01:30:32,555 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:32,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-02 01:30:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-02 01:30:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-12-02 01:30:32,555 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 38 states. [2018-12-02 01:30:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:32,776 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-12-02 01:30:32,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-02 01:30:32,776 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 96 [2018-12-02 01:30:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:32,777 INFO L225 Difference]: With dead ends: 104 [2018-12-02 01:30:32,777 INFO L226 Difference]: Without dead ends: 103 [2018-12-02 01:30:32,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2584, Invalid=5788, Unknown=0, NotChecked=0, Total=8372 [2018-12-02 01:30:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-02 01:30:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-12-02 01:30:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-12-02 01:30:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-12-02 01:30:32,779 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2018-12-02 01:30:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:32,780 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-12-02 01:30:32,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-02 01:30:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-12-02 01:30:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-02 01:30:32,780 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:32,780 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:32,780 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:32,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash 909843065, now seen corresponding path program 18 times [2018-12-02 01:30:32,780 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:32,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:32,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:32,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:32,781 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:33,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:33,093 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:33,093 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:33,093 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:33,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:33,094 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:33,101 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:33,101 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:33,118 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:33,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:33,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:33,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:33,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:33,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2018-12-02 01:30:33,848 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:33,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-02 01:30:33,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-02 01:30:33,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-12-02 01:30:33,849 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 40 states. [2018-12-02 01:30:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:34,086 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-12-02 01:30:34,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-02 01:30:34,086 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 101 [2018-12-02 01:30:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:34,087 INFO L225 Difference]: With dead ends: 109 [2018-12-02 01:30:34,087 INFO L226 Difference]: Without dead ends: 108 [2018-12-02 01:30:34,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2870, Invalid=6442, Unknown=0, NotChecked=0, Total=9312 [2018-12-02 01:30:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-12-02 01:30:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-12-02 01:30:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-12-02 01:30:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-12-02 01:30:34,089 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2018-12-02 01:30:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:34,089 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-12-02 01:30:34,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-02 01:30:34,089 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-12-02 01:30:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-12-02 01:30:34,090 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:34,090 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:34,090 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:34,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1512651941, now seen corresponding path program 19 times [2018-12-02 01:30:34,090 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:34,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:34,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:34,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:34,091 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:34,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:34,426 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:34,426 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:34,426 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:34,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:34,426 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:34,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:34,433 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:34,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:34,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:35,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:35,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2018-12-02 01:30:35,259 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:35,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-02 01:30:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-02 01:30:35,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-12-02 01:30:35,260 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 42 states. [2018-12-02 01:30:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:35,521 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-12-02 01:30:35,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-02 01:30:35,521 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 106 [2018-12-02 01:30:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:35,522 INFO L225 Difference]: With dead ends: 114 [2018-12-02 01:30:35,522 INFO L226 Difference]: Without dead ends: 113 [2018-12-02 01:30:35,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3171, Invalid=7131, Unknown=0, NotChecked=0, Total=10302 [2018-12-02 01:30:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-12-02 01:30:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-12-02 01:30:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-12-02 01:30:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-12-02 01:30:35,525 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2018-12-02 01:30:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:35,525 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-12-02 01:30:35,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-02 01:30:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-12-02 01:30:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-12-02 01:30:35,525 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:35,526 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:35,526 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:35,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:35,526 INFO L82 PathProgramCache]: Analyzing trace with hash -286566471, now seen corresponding path program 20 times [2018-12-02 01:30:35,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:35,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:35,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:35,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:35,526 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 0 proven. 1030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:35,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:35,957 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:35,957 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:35,957 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:35,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:35,957 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:35,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:35,965 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:36,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-02 01:30:36,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:36,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 0 proven. 1030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:36,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 0 proven. 1030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:36,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:36,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 85 [2018-12-02 01:30:36,888 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:36,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-02 01:30:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-02 01:30:36,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-12-02 01:30:36,888 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 44 states. [2018-12-02 01:30:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:37,152 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-12-02 01:30:37,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-02 01:30:37,153 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 111 [2018-12-02 01:30:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:37,154 INFO L225 Difference]: With dead ends: 119 [2018-12-02 01:30:37,154 INFO L226 Difference]: Without dead ends: 118 [2018-12-02 01:30:37,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3487, Invalid=7855, Unknown=0, NotChecked=0, Total=11342 [2018-12-02 01:30:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-02 01:30:37,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2018-12-02 01:30:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-12-02 01:30:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-12-02 01:30:37,157 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2018-12-02 01:30:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:37,157 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-12-02 01:30:37,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-02 01:30:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-12-02 01:30:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-12-02 01:30:37,158 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:37,158 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:37,158 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:37,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:37,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1610272283, now seen corresponding path program 21 times [2018-12-02 01:30:37,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:37,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:37,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:37,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:37,159 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:37,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:37,552 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:37,553 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:37,553 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:37,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:37,553 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:37,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:37,558 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:37,576 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:37,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:37,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:37,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:38,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:38,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 89 [2018-12-02 01:30:38,520 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:38,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-02 01:30:38,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-02 01:30:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-12-02 01:30:38,520 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 46 states. [2018-12-02 01:30:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:38,794 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-12-02 01:30:38,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-02 01:30:38,794 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 116 [2018-12-02 01:30:38,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:38,795 INFO L225 Difference]: With dead ends: 124 [2018-12-02 01:30:38,795 INFO L226 Difference]: Without dead ends: 123 [2018-12-02 01:30:38,795 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3818, Invalid=8614, Unknown=0, NotChecked=0, Total=12432 [2018-12-02 01:30:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-02 01:30:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-12-02 01:30:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-12-02 01:30:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-12-02 01:30:38,797 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2018-12-02 01:30:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:38,798 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-12-02 01:30:38,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-02 01:30:38,798 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-12-02 01:30:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-12-02 01:30:38,798 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:38,798 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:38,798 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:38,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:38,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1130366201, now seen corresponding path program 22 times [2018-12-02 01:30:38,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:38,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:38,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:38,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:38,799 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:39,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:39,241 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:39,241 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:39,241 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:39,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:39,241 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:39,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:39,247 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:39,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:39,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:40,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:40,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2018-12-02 01:30:40,282 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:40,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-02 01:30:40,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-02 01:30:40,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-12-02 01:30:40,282 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 48 states. [2018-12-02 01:30:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:40,598 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-12-02 01:30:40,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-02 01:30:40,599 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 121 [2018-12-02 01:30:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:40,599 INFO L225 Difference]: With dead ends: 129 [2018-12-02 01:30:40,599 INFO L226 Difference]: Without dead ends: 128 [2018-12-02 01:30:40,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4164, Invalid=9408, Unknown=0, NotChecked=0, Total=13572 [2018-12-02 01:30:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-02 01:30:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2018-12-02 01:30:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-12-02 01:30:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-12-02 01:30:40,603 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2018-12-02 01:30:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:40,603 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-12-02 01:30:40,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-02 01:30:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-12-02 01:30:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-12-02 01:30:40,604 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:40,604 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:40,604 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:40,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1470130395, now seen corresponding path program 23 times [2018-12-02 01:30:40,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:40,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:40,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:40,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:40,605 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 0 proven. 1357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:41,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:41,066 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:41,066 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:41,066 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:41,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:41,066 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:41,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:41,073 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:41,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-02 01:30:41,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:41,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 0 proven. 1357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:41,142 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 0 proven. 1357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:42,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:42,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2018-12-02 01:30:42,256 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:42,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-02 01:30:42,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-02 01:30:42,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-12-02 01:30:42,257 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 50 states. [2018-12-02 01:30:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:42,574 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-12-02 01:30:42,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-02 01:30:42,575 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 126 [2018-12-02 01:30:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:42,575 INFO L225 Difference]: With dead ends: 134 [2018-12-02 01:30:42,575 INFO L226 Difference]: Without dead ends: 133 [2018-12-02 01:30:42,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4525, Invalid=10237, Unknown=0, NotChecked=0, Total=14762 [2018-12-02 01:30:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-02 01:30:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2018-12-02 01:30:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-12-02 01:30:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-12-02 01:30:42,578 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2018-12-02 01:30:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:42,578 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-12-02 01:30:42,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-02 01:30:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-12-02 01:30:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-12-02 01:30:42,578 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:42,578 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:42,579 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:42,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:42,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1556947513, now seen corresponding path program 24 times [2018-12-02 01:30:42,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:42,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:42,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:42,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:42,579 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 0 proven. 1476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:43,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:43,063 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:43,063 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:43,063 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:43,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:43,063 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:43,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:43,069 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:43,089 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:43,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:43,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 0 proven. 1476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:43,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 0 proven. 1476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:44,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:44,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2018-12-02 01:30:44,260 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:44,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-02 01:30:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-02 01:30:44,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-12-02 01:30:44,261 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 52 states. [2018-12-02 01:30:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:44,624 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-12-02 01:30:44,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-02 01:30:44,625 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 131 [2018-12-02 01:30:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:44,625 INFO L225 Difference]: With dead ends: 139 [2018-12-02 01:30:44,625 INFO L226 Difference]: Without dead ends: 138 [2018-12-02 01:30:44,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3277 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4901, Invalid=11101, Unknown=0, NotChecked=0, Total=16002 [2018-12-02 01:30:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-12-02 01:30:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-12-02 01:30:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-12-02 01:30:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-12-02 01:30:44,630 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2018-12-02 01:30:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:44,630 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-12-02 01:30:44,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-02 01:30:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-12-02 01:30:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-12-02 01:30:44,631 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:44,631 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:44,631 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:44,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash 68391835, now seen corresponding path program 25 times [2018-12-02 01:30:44,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:44,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:44,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:44,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:44,631 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:45,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:45,167 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:45,167 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:45,167 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:45,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:45,167 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:45,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:45,173 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:45,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:45,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:46,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:46,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2018-12-02 01:30:46,521 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:46,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-02 01:30:46,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-02 01:30:46,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-12-02 01:30:46,522 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 54 states. [2018-12-02 01:30:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:46,900 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-12-02 01:30:46,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-02 01:30:46,900 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 136 [2018-12-02 01:30:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:46,900 INFO L225 Difference]: With dead ends: 144 [2018-12-02 01:30:46,901 INFO L226 Difference]: Without dead ends: 143 [2018-12-02 01:30:46,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5292, Invalid=12000, Unknown=0, NotChecked=0, Total=17292 [2018-12-02 01:30:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-02 01:30:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2018-12-02 01:30:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-02 01:30:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-12-02 01:30:46,903 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2018-12-02 01:30:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:46,904 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-12-02 01:30:46,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-02 01:30:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-12-02 01:30:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-12-02 01:30:46,904 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:46,904 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:46,904 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:46,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1936109433, now seen corresponding path program 26 times [2018-12-02 01:30:46,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:46,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:46,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:46,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:46,905 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1729 backedges. 0 proven. 1729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:47,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:47,484 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:47,484 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:47,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:47,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:47,484 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:47,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:47,490 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:47,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-02 01:30:47,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:47,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1729 backedges. 0 proven. 1729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:47,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1729 backedges. 0 proven. 1729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:48,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:48,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 109 [2018-12-02 01:30:48,944 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:48,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-02 01:30:48,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-02 01:30:48,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-12-02 01:30:48,944 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 56 states. [2018-12-02 01:30:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:49,335 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-12-02 01:30:49,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-12-02 01:30:49,335 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 141 [2018-12-02 01:30:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:49,336 INFO L225 Difference]: With dead ends: 149 [2018-12-02 01:30:49,336 INFO L226 Difference]: Without dead ends: 148 [2018-12-02 01:30:49,336 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3836 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5698, Invalid=12934, Unknown=0, NotChecked=0, Total=18632 [2018-12-02 01:30:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-02 01:30:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2018-12-02 01:30:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-12-02 01:30:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-12-02 01:30:49,339 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2018-12-02 01:30:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:49,339 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-12-02 01:30:49,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-02 01:30:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-12-02 01:30:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-12-02 01:30:49,339 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:49,339 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:49,339 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:49,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash 765480539, now seen corresponding path program 27 times [2018-12-02 01:30:49,340 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:49,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:49,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:49,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:49,340 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 1863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:49,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:49,933 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:49,933 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:49,933 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:49,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:49,934 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:49,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:30:49,939 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 01:30:49,962 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:30:49,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:49,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 1863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:49,979 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 1863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:51,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:51,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 113 [2018-12-02 01:30:51,475 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:51,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-12-02 01:30:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-12-02 01:30:51,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-12-02 01:30:51,476 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 58 states. [2018-12-02 01:30:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:51,936 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-12-02 01:30:51,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-02 01:30:51,936 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 146 [2018-12-02 01:30:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:51,937 INFO L225 Difference]: With dead ends: 154 [2018-12-02 01:30:51,937 INFO L226 Difference]: Without dead ends: 153 [2018-12-02 01:30:51,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6119, Invalid=13903, Unknown=0, NotChecked=0, Total=20022 [2018-12-02 01:30:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-02 01:30:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-12-02 01:30:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-12-02 01:30:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-12-02 01:30:51,940 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2018-12-02 01:30:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:51,940 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-12-02 01:30:51,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-12-02 01:30:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-12-02 01:30:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-12-02 01:30:51,940 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:51,940 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:51,940 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:51,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:51,941 INFO L82 PathProgramCache]: Analyzing trace with hash 241216697, now seen corresponding path program 28 times [2018-12-02 01:30:51,941 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:51,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:51,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:51,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:51,941 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:52,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:52,573 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:52,573 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:52,573 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:52,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:52,573 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:52,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:52,579 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 01:30:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:52,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:52,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:54,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:54,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 117 [2018-12-02 01:30:54,196 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:54,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-02 01:30:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-02 01:30:54,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-12-02 01:30:54,197 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 60 states. [2018-12-02 01:30:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:54,664 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-12-02 01:30:54,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-12-02 01:30:54,664 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 151 [2018-12-02 01:30:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:54,665 INFO L225 Difference]: With dead ends: 159 [2018-12-02 01:30:54,665 INFO L226 Difference]: Without dead ends: 158 [2018-12-02 01:30:54,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4439 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6555, Invalid=14907, Unknown=0, NotChecked=0, Total=21462 [2018-12-02 01:30:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-02 01:30:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2018-12-02 01:30:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-12-02 01:30:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-12-02 01:30:54,668 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 151 [2018-12-02 01:30:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:54,668 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-12-02 01:30:54,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-02 01:30:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-12-02 01:30:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-12-02 01:30:54,669 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:54,669 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:54,669 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:54,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1382901477, now seen corresponding path program 29 times [2018-12-02 01:30:54,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:54,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:54,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:30:54,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:54,669 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2146 backedges. 0 proven. 2146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:55,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:55,340 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:30:55,341 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 01:30:55,341 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 01:30:55,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:30:55,341 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/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 [2018-12-02 01:30:55,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:30:55,348 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 01:30:55,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-02 01:30:55,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:30:55,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:30:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2146 backedges. 0 proven. 2146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:55,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:30:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2146 backedges. 0 proven. 2146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:57,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 01:30:57,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 121 [2018-12-02 01:30:57,148 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 01:30:57,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-12-02 01:30:57,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-12-02 01:30:57,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-12-02 01:30:57,149 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 62 states. [2018-12-02 01:30:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:30:57,628 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-12-02 01:30:57,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-12-02 01:30:57,629 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 156 [2018-12-02 01:30:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:30:57,629 INFO L225 Difference]: With dead ends: 164 [2018-12-02 01:30:57,629 INFO L226 Difference]: Without dead ends: 163 [2018-12-02 01:30:57,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4757 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7006, Invalid=15946, Unknown=0, NotChecked=0, Total=22952 [2018-12-02 01:30:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-02 01:30:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2018-12-02 01:30:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-12-02 01:30:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-12-02 01:30:57,632 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 156 [2018-12-02 01:30:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:30:57,633 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-12-02 01:30:57,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-12-02 01:30:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-12-02 01:30:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-12-02 01:30:57,634 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:30:57,634 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:30:57,634 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 01:30:57,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:30:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1139743225, now seen corresponding path program 30 times [2018-12-02 01:30:57,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:30:57,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:57,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:30:57,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:30:57,635 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:30:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:30:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 2295 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:30:59,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:30:59,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2018-12-02 01:30:59,379 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:30:59,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-12-02 01:30:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-12-02 01:30:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=6013, Unknown=0, NotChecked=0, Total=8930 [2018-12-02 01:30:59,379 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 95 states. [2018-12-02 01:31:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:31:00,191 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-12-02 01:31:00,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-02 01:31:00,191 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 161 [2018-12-02 01:31:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:31:00,192 INFO L225 Difference]: With dead ends: 164 [2018-12-02 01:31:00,192 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 01:31:00,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6614 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6850, Invalid=17330, Unknown=0, NotChecked=0, Total=24180 [2018-12-02 01:31:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 01:31:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 01:31:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 01:31:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 01:31:00,194 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2018-12-02 01:31:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:31:00,194 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 01:31:00,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-12-02 01:31:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 01:31:00,194 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 01:31:00,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 01:31:00,583 WARN L180 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 158 [2018-12-02 01:31:00,585 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-02 01:31:00,585 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 01:31:00,585 INFO L448 ceAbstractionStarter]: For program point mlogFINAL(lines 3 16) no Hoare annotation was computed. [2018-12-02 01:31:00,585 INFO L448 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-12-02 01:31:00,585 INFO L448 ceAbstractionStarter]: For program point L9(line 9) no Hoare annotation was computed. [2018-12-02 01:31:00,585 INFO L448 ceAbstractionStarter]: For program point L10-1(line 10) no Hoare annotation was computed. [2018-12-02 01:31:00,585 INFO L448 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2018-12-02 01:31:00,585 INFO L448 ceAbstractionStarter]: For program point mlogErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 9) no Hoare annotation was computed. [2018-12-02 01:31:00,585 INFO L448 ceAbstractionStarter]: For program point mlogEXIT(lines 3 16) no Hoare annotation was computed. [2018-12-02 01:31:00,586 INFO L444 ceAbstractionStarter]: At program point L7-2(lines 7 12) the Hoare annotation is: (let ((.cse1 (div mlog_~x 2)) (.cse0 (< 0 (+ mlog_~x 1))) (.cse2 (<= 0 mlog_~res~0))) (or (and (<= mlog_~res~0 22) .cse0 (<= .cse1 255) .cse2) (and (<= mlog_~res~0 19) .cse0 (<= .cse1 2047) .cse2) (and (<= .cse1 16777215) .cse0 (<= mlog_~res~0 6) .cse2) (< 2147483647 |mlog_#in~x|) (and (<= mlog_~x 2147483647) (<= mlog_~res~0 0) .cse2) (and (<= .cse1 7) .cse0 (<= mlog_~res~0 27) .cse2) (and .cse0 (<= mlog_~res~0 8) (<= .cse1 4194303) .cse2) (and (<= mlog_~res~0 18) .cse0 .cse2 (<= .cse1 4095)) (and .cse0 (<= mlog_~res~0 13) (<= .cse1 131071) .cse2) (and (<= mlog_~res~0 20) .cse0 .cse2 (<= .cse1 1023)) (and (<= mlog_~res~0 28) .cse0 (<= .cse1 3) .cse2) (and (<= mlog_~res~0 1) .cse0 (<= .cse1 536870911) .cse2) (and .cse0 (<= mlog_~res~0 26) (<= .cse1 15) .cse2) (and .cse0 (<= mlog_~res~0 15) (<= .cse1 32767) .cse2) (and .cse0 (<= mlog_~res~0 24) .cse2 (<= .cse1 63)) (and (<= .cse1 33554431) .cse0 (<= mlog_~res~0 5) .cse2) (and (<= mlog_~res~0 3) .cse0 (<= .cse1 134217727) .cse2) (and (<= .cse1 1048575) (<= mlog_~res~0 10) .cse0 .cse2) (and .cse0 (<= mlog_~res~0 11) (<= .cse1 524287) .cse2) (and .cse0 (<= .cse1 8388607) .cse2 (<= mlog_~res~0 7)) (and .cse0 (<= .cse1 2097151) .cse2 (<= mlog_~res~0 9)) (and (<= mlog_~res~0 23) .cse0 (<= .cse1 127) .cse2) (and .cse0 (<= .cse1 67108863) (<= mlog_~res~0 4) .cse2) (and (<= mlog_~res~0 21) (<= .cse1 511) .cse0 .cse2) (and (<= mlog_~res~0 16) .cse0 .cse2 (<= .cse1 16383)) (and (<= mlog_~res~0 2) .cse0 .cse2 (<= .cse1 268435455)) (and (<= .cse1 1) (<= mlog_~res~0 29) .cse0 .cse2) (and .cse0 (<= .cse1 8191) (<= mlog_~res~0 17) .cse2) (and .cse0 .cse2 (<= mlog_~x 1)) (and (<= mlog_~res~0 25) .cse0 .cse2 (<= .cse1 31)) (and (<= .cse1 65535) .cse0 .cse2 (<= mlog_~res~0 14)) (and (<= .cse1 262143) .cse0 (<= mlog_~res~0 12) .cse2))) [2018-12-02 01:31:00,586 INFO L448 ceAbstractionStarter]: For program point mlogErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 9) no Hoare annotation was computed. [2018-12-02 01:31:00,586 INFO L448 ceAbstractionStarter]: For program point mlogErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2018-12-02 01:31:00,586 INFO L448 ceAbstractionStarter]: For program point mlogErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2018-12-02 01:31:00,586 INFO L448 ceAbstractionStarter]: For program point L7-3(lines 7 12) no Hoare annotation was computed. [2018-12-02 01:31:00,586 INFO L451 ceAbstractionStarter]: At program point mlogENTRY(lines 3 16) the Hoare annotation is: true [2018-12-02 01:31:00,586 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 01:31:00,586 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 01:31:00,586 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 01:31:00,586 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 01:31:00,587 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 18 20) the Hoare annotation is: true [2018-12-02 01:31:00,587 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 18 20) no Hoare annotation was computed. [2018-12-02 01:31:00,587 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 18 20) no Hoare annotation was computed. [2018-12-02 01:31:00,587 INFO L444 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (<= |main_#t~nondet1| 2147483647) [2018-12-02 01:31:00,587 INFO L448 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-12-02 01:31:00,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:31:00 BoogieIcfgContainer [2018-12-02 01:31:00,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 01:31:00,599 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 01:31:00,599 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 01:31:00,599 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 01:31:00,600 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:30:22" (3/4) ... [2018-12-02 01:31:00,603 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 01:31:00,607 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 01:31:00,607 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure mlog [2018-12-02 01:31:00,608 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 01:31:00,610 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-12-02 01:31:00,610 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-02 01:31:00,610 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 01:31:00,629 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((((((((((((((res <= 22 && 0 < x + 1) && x / 2 <= 255) && 0 <= res) || (((res <= 19 && 0 < x + 1) && x / 2 <= 2047) && 0 <= res)) || (((x / 2 <= 16777215 && 0 < x + 1) && res <= 6) && 0 <= res)) || 2147483647 < \old(x)) || ((x <= 2147483647 && res <= 0) && 0 <= res)) || (((x / 2 <= 7 && 0 < x + 1) && res <= 27) && 0 <= res)) || (((0 < x + 1 && res <= 8) && x / 2 <= 4194303) && 0 <= res)) || (((res <= 18 && 0 < x + 1) && 0 <= res) && x / 2 <= 4095)) || (((0 < x + 1 && res <= 13) && x / 2 <= 131071) && 0 <= res)) || (((res <= 20 && 0 < x + 1) && 0 <= res) && x / 2 <= 1023)) || (((res <= 28 && 0 < x + 1) && x / 2 <= 3) && 0 <= res)) || (((res <= 1 && 0 < x + 1) && x / 2 <= 536870911) && 0 <= res)) || (((0 < x + 1 && res <= 26) && x / 2 <= 15) && 0 <= res)) || (((0 < x + 1 && res <= 15) && x / 2 <= 32767) && 0 <= res)) || (((0 < x + 1 && res <= 24) && 0 <= res) && x / 2 <= 63)) || (((x / 2 <= 33554431 && 0 < x + 1) && res <= 5) && 0 <= res)) || (((res <= 3 && 0 < x + 1) && x / 2 <= 134217727) && 0 <= res)) || (((x / 2 <= 1048575 && res <= 10) && 0 < x + 1) && 0 <= res)) || (((0 < x + 1 && res <= 11) && x / 2 <= 524287) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 8388607) && 0 <= res) && res <= 7)) || (((0 < x + 1 && x / 2 <= 2097151) && 0 <= res) && res <= 9)) || (((res <= 23 && 0 < x + 1) && x / 2 <= 127) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 67108863) && res <= 4) && 0 <= res)) || (((res <= 21 && x / 2 <= 511) && 0 < x + 1) && 0 <= res)) || (((res <= 16 && 0 < x + 1) && 0 <= res) && x / 2 <= 16383)) || (((res <= 2 && 0 < x + 1) && 0 <= res) && x / 2 <= 268435455)) || (((x / 2 <= 1 && res <= 29) && 0 < x + 1) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 8191) && res <= 17) && 0 <= res)) || ((0 < x + 1 && 0 <= res) && x <= 1)) || (((res <= 25 && 0 < x + 1) && 0 <= res) && x / 2 <= 31)) || (((x / 2 <= 65535 && 0 < x + 1) && 0 <= res) && res <= 14)) || (((x / 2 <= 262143 && 0 < x + 1) && res <= 12) && 0 <= res) [2018-12-02 01:31:00,638 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c62c2f1e-cc28-49ff-a94d-871116ed5153/bin-2019/utaipan/witness.graphml [2018-12-02 01:31:00,638 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 01:31:00,638 INFO L168 Benchmark]: Toolchain (without parser) took 38591.77 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 342.9 MB). Free memory was 954.4 MB in the beginning and 1.2 GB in the end (delta: -289.2 MB). Peak memory consumption was 53.7 MB. Max. memory is 11.5 GB. [2018-12-02 01:31:00,639 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:31:00,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 115.59 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 01:31:00,640 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.77 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:31:00,640 INFO L168 Benchmark]: Boogie Preprocessor took 11.48 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:31:00,640 INFO L168 Benchmark]: RCFGBuilder took 153.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -142.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-12-02 01:31:00,640 INFO L168 Benchmark]: TraceAbstraction took 38258.64 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 242.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -157.1 MB). Peak memory consumption was 547.6 MB. Max. memory is 11.5 GB. [2018-12-02 01:31:00,641 INFO L168 Benchmark]: Witness Printer took 39.01 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:31:00,643 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 115.59 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 10.77 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.48 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 153.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -142.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 38258.64 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 242.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -157.1 MB). Peak memory consumption was 547.6 MB. Max. memory is 11.5 GB. * Witness Printer took 39.01 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 9]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 9]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((res <= 22 && 0 < x + 1) && x / 2 <= 255) && 0 <= res) || (((res <= 19 && 0 < x + 1) && x / 2 <= 2047) && 0 <= res)) || (((x / 2 <= 16777215 && 0 < x + 1) && res <= 6) && 0 <= res)) || 2147483647 < \old(x)) || ((x <= 2147483647 && res <= 0) && 0 <= res)) || (((x / 2 <= 7 && 0 < x + 1) && res <= 27) && 0 <= res)) || (((0 < x + 1 && res <= 8) && x / 2 <= 4194303) && 0 <= res)) || (((res <= 18 && 0 < x + 1) && 0 <= res) && x / 2 <= 4095)) || (((0 < x + 1 && res <= 13) && x / 2 <= 131071) && 0 <= res)) || (((res <= 20 && 0 < x + 1) && 0 <= res) && x / 2 <= 1023)) || (((res <= 28 && 0 < x + 1) && x / 2 <= 3) && 0 <= res)) || (((res <= 1 && 0 < x + 1) && x / 2 <= 536870911) && 0 <= res)) || (((0 < x + 1 && res <= 26) && x / 2 <= 15) && 0 <= res)) || (((0 < x + 1 && res <= 15) && x / 2 <= 32767) && 0 <= res)) || (((0 < x + 1 && res <= 24) && 0 <= res) && x / 2 <= 63)) || (((x / 2 <= 33554431 && 0 < x + 1) && res <= 5) && 0 <= res)) || (((res <= 3 && 0 < x + 1) && x / 2 <= 134217727) && 0 <= res)) || (((x / 2 <= 1048575 && res <= 10) && 0 < x + 1) && 0 <= res)) || (((0 < x + 1 && res <= 11) && x / 2 <= 524287) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 8388607) && 0 <= res) && res <= 7)) || (((0 < x + 1 && x / 2 <= 2097151) && 0 <= res) && res <= 9)) || (((res <= 23 && 0 < x + 1) && x / 2 <= 127) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 67108863) && res <= 4) && 0 <= res)) || (((res <= 21 && x / 2 <= 511) && 0 < x + 1) && 0 <= res)) || (((res <= 16 && 0 < x + 1) && 0 <= res) && x / 2 <= 16383)) || (((res <= 2 && 0 < x + 1) && 0 <= res) && x / 2 <= 268435455)) || (((x / 2 <= 1 && res <= 29) && 0 < x + 1) && 0 <= res)) || (((0 < x + 1 && x / 2 <= 8191) && res <= 17) && 0 <= res)) || ((0 < x + 1 && 0 <= res) && x <= 1)) || (((res <= 25 && 0 < x + 1) && 0 <= res) && x / 2 <= 31)) || (((x / 2 <= 65535 && 0 < x + 1) && 0 <= res) && res <= 14)) || (((x / 2 <= 262143 && 0 < x + 1) && res <= 12) && 0 <= res) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 4 error locations. SAFE Result, 38.2s OverallTime, 33 OverallIterations, 31 TraceHistogramMax, 7.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 391 SDtfs, 1841 SDslu, 6683 SDs, 0 SdLazy, 3457 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6551 GetRequests, 4065 SyntacticMatches, 0 SemanticMatches, 2486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55653 ImplicationChecksByTransitivity, 32.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 33 MinimizatonAttempts, 31 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 38 NumberOfFragments, 528 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 183 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 28.5s InterpolantComputationTime, 5181 NumberOfCodeBlocks, 5181 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 7584 ConstructedInterpolants, 0 QuantifiedInterpolants, 2386466 SizeOfPredicates, 464 NumberOfNonLiveVariables, 5597 ConjunctsInSsa, 957 ConjunctsInUnsatCore, 91 InterpolantComputations, 4 PerfectInterpolantSequences, 2295/68415 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...