./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination4_false-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_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 94b61e96441ca10668b436b4ef10dfd9464f0863 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 17:25:09,397 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 17:25:09,398 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 17:25:09,405 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 17:25:09,405 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 17:25:09,406 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 17:25:09,407 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 17:25:09,408 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 17:25:09,410 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 17:25:09,410 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 17:25:09,411 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 17:25:09,411 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 17:25:09,412 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 17:25:09,412 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 17:25:09,413 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 17:25:09,414 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 17:25:09,415 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 17:25:09,416 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 17:25:09,417 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 17:25:09,418 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 17:25:09,419 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 17:25:09,420 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 17:25:09,421 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 17:25:09,422 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 17:25:09,422 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 17:25:09,422 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 17:25:09,423 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 17:25:09,424 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 17:25:09,424 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 17:25:09,425 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 17:25:09,425 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 17:25:09,426 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 17:25:09,426 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 17:25:09,426 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 17:25:09,427 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 17:25:09,427 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 17:25:09,427 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-12-08 17:25:09,437 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 17:25:09,438 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 17:25:09,438 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 17:25:09,438 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 17:25:09,439 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 17:25:09,439 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 17:25:09,439 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 17:25:09,439 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 17:25:09,439 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 17:25:09,439 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 17:25:09,439 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 17:25:09,440 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 17:25:09,440 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 17:25:09,440 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 17:25:09,440 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 17:25:09,441 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 17:25:09,441 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 17:25:09,441 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 17:25:09,441 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 17:25:09,441 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 17:25:09,441 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-08 17:25:09,442 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 17:25:09,442 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 17:25:09,442 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 17:25:09,442 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 17:25:09,442 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 17:25:09,442 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 17:25:09,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 17:25:09,443 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 17:25:09,443 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 17:25:09,443 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 17:25:09,443 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 17:25:09,443 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 17:25:09,443 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 17:25:09,443 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 17:25:09,444 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_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94b61e96441ca10668b436b4ef10dfd9464f0863 [2018-12-08 17:25:09,467 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 17:25:09,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 17:25:09,476 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 17:25:09,477 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 17:25:09,477 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 17:25:09,478 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c [2018-12-08 17:25:09,512 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/data/e0c0b0762/fd07177cbb824bdb936011e961a33043/FLAG05a19da31 [2018-12-08 17:25:09,889 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 17:25:09,889 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/sv-benchmarks/c/termination-crafted/NonTermination4_false-no-overflow.c [2018-12-08 17:25:09,893 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/data/e0c0b0762/fd07177cbb824bdb936011e961a33043/FLAG05a19da31 [2018-12-08 17:25:09,901 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/data/e0c0b0762/fd07177cbb824bdb936011e961a33043 [2018-12-08 17:25:09,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 17:25:09,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 17:25:09,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 17:25:09,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 17:25:09,906 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 17:25:09,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 05:25:09" (1/1) ... [2018-12-08 17:25:09,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59facd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:09, skipping insertion in model container [2018-12-08 17:25:09,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 05:25:09" (1/1) ... [2018-12-08 17:25:09,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 17:25:09,920 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 17:25:09,999 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 17:25:10,001 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 17:25:10,009 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 17:25:10,017 INFO L195 MainTranslator]: Completed translation [2018-12-08 17:25:10,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10 WrapperNode [2018-12-08 17:25:10,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 17:25:10,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 17:25:10,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 17:25:10,018 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 17:25:10,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 17:25:10,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 17:25:10,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 17:25:10,030 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 17:25:10,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... [2018-12-08 17:25:10,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 17:25:10,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 17:25:10,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 17:25:10,042 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 17:25:10,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 17:25:10,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 17:25:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 17:25:10,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 17:25:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 17:25:10,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 17:25:10,179 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 17:25:10,180 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 17:25:10,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:25:10 BoogieIcfgContainer [2018-12-08 17:25:10,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 17:25:10,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 17:25:10,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 17:25:10,182 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 17:25:10,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 05:25:09" (1/3) ... [2018-12-08 17:25:10,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca3c140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 05:25:10, skipping insertion in model container [2018-12-08 17:25:10,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:25:10" (2/3) ... [2018-12-08 17:25:10,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca3c140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 05:25:10, skipping insertion in model container [2018-12-08 17:25:10,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:25:10" (3/3) ... [2018-12-08 17:25:10,184 INFO L112 eAbstractionObserver]: Analyzing ICFG NonTermination4_false-no-overflow.c [2018-12-08 17:25:10,190 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 17:25:10,194 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-12-08 17:25:10,203 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-12-08 17:25:10,222 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 17:25:10,222 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 17:25:10,222 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 17:25:10,222 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 17:25:10,222 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 17:25:10,222 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 17:25:10,222 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 17:25:10,223 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 17:25:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-08 17:25:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-08 17:25:10,236 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:10,237 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:10,238 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:10,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash -37667266, now seen corresponding path program 1 times [2018-12-08 17:25:10,243 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:10,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,275 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,318 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 17:25:10,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 17:25:10,318 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 17:25:10,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 17:25:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 17:25:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 17:25:10,330 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-12-08 17:25:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:10,356 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-12-08 17:25:10,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 17:25:10,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-12-08 17:25:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:10,362 INFO L225 Difference]: With dead ends: 28 [2018-12-08 17:25:10,362 INFO L226 Difference]: Without dead ends: 17 [2018-12-08 17:25:10,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 17:25:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-08 17:25:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-12-08 17:25:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 17:25:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-08 17:25:10,384 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2018-12-08 17:25:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:10,384 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-08 17:25:10,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 17:25:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-08 17:25:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-08 17:25:10,385 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:10,385 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:10,385 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:10,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1167685199, now seen corresponding path program 1 times [2018-12-08 17:25:10,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:10,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,386 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,408 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 17:25:10,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 17:25:10,408 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 17:25:10,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 17:25:10,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 17:25:10,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 17:25:10,409 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-12-08 17:25:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:10,416 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-12-08 17:25:10,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 17:25:10,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-08 17:25:10,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:10,417 INFO L225 Difference]: With dead ends: 16 [2018-12-08 17:25:10,417 INFO L226 Difference]: Without dead ends: 15 [2018-12-08 17:25:10,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 17:25:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-08 17:25:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-08 17:25:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-08 17:25:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-08 17:25:10,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2018-12-08 17:25:10,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:10,420 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-08 17:25:10,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 17:25:10,420 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-08 17:25:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-08 17:25:10,420 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:10,420 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:10,421 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:10,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1838502752, now seen corresponding path program 1 times [2018-12-08 17:25:10,421 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:10,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,422 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,435 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 17:25:10,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 17:25:10,435 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 17:25:10,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 17:25:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 17:25:10,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 17:25:10,436 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2018-12-08 17:25:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:10,446 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-12-08 17:25:10,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 17:25:10,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-08 17:25:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:10,447 INFO L225 Difference]: With dead ends: 19 [2018-12-08 17:25:10,447 INFO L226 Difference]: Without dead ends: 18 [2018-12-08 17:25:10,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 17:25:10,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-08 17:25:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-12-08 17:25:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-08 17:25:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-08 17:25:10,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 9 [2018-12-08 17:25:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:10,451 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-08 17:25:10,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 17:25:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-08 17:25:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 17:25:10,451 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:10,451 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:10,451 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:10,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1159010413, now seen corresponding path program 1 times [2018-12-08 17:25:10,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:10,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,453 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 17:25:10,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 17:25:10,466 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 17:25:10,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 17:25:10,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 17:25:10,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 17:25:10,467 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2018-12-08 17:25:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:10,472 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-12-08 17:25:10,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 17:25:10,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-08 17:25:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:10,473 INFO L225 Difference]: With dead ends: 17 [2018-12-08 17:25:10,473 INFO L226 Difference]: Without dead ends: 16 [2018-12-08 17:25:10,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 17:25:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-08 17:25:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-08 17:25:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 17:25:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-08 17:25:10,476 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2018-12-08 17:25:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:10,476 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-08 17:25:10,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 17:25:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-08 17:25:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 17:25:10,476 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:10,476 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:10,476 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:10,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1412475851, now seen corresponding path program 1 times [2018-12-08 17:25:10,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:10,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,478 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:10,495 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:10,495 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2018-12-08 17:25:10,496 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [14], [15], [17], [19], [21], [27], [28], [29] [2018-12-08 17:25:10,515 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 17:25:10,515 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 17:25:10,594 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 17:25:10,595 INFO L272 AbstractInterpreter]: Visited 11 different actions 23 times. Merged at 5 different actions 10 times. Never widened. Performed 67 root evaluator evaluations with a maximum evaluation depth of 3. Performed 67 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-12-08 17:25:10,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,600 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 17:25:10,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:10,600 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:10,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,607 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,638 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:10,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-08 17:25:10,670 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:10,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 17:25:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 17:25:10,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 17:25:10,671 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2018-12-08 17:25:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:10,686 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-12-08 17:25:10,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 17:25:10,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-08 17:25:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:10,686 INFO L225 Difference]: With dead ends: 21 [2018-12-08 17:25:10,687 INFO L226 Difference]: Without dead ends: 20 [2018-12-08 17:25:10,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 17:25:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-08 17:25:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-12-08 17:25:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-08 17:25:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-12-08 17:25:10,689 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12 [2018-12-08 17:25:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:10,689 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-12-08 17:25:10,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 17:25:10,690 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-12-08 17:25:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 17:25:10,690 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:10,690 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:10,690 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:10,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,691 INFO L82 PathProgramCache]: Analyzing trace with hash -179625769, now seen corresponding path program 1 times [2018-12-08 17:25:10,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:10,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,692 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:10,710 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:10,710 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-12-08 17:25:10,710 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [15], [17], [18], [19], [21], [27], [28], [29] [2018-12-08 17:25:10,711 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 17:25:10,711 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 17:25:10,731 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 17:25:10,731 INFO L272 AbstractInterpreter]: Visited 11 different actions 23 times. Merged at 5 different actions 10 times. Never widened. Performed 80 root evaluator evaluations with a maximum evaluation depth of 3. Performed 80 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-12-08 17:25:10,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,735 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 17:25:10,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:10,735 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:10,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,741 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:10,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-08 17:25:10,802 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:10,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 17:25:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 17:25:10,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 17:25:10,803 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 4 states. [2018-12-08 17:25:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:10,811 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-12-08 17:25:10,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 17:25:10,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-08 17:25:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:10,811 INFO L225 Difference]: With dead ends: 23 [2018-12-08 17:25:10,812 INFO L226 Difference]: Without dead ends: 22 [2018-12-08 17:25:10,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 17:25:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-08 17:25:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-08 17:25:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 17:25:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-12-08 17:25:10,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2018-12-08 17:25:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:10,814 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-12-08 17:25:10,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 17:25:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-12-08 17:25:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-08 17:25:10,814 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:10,815 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:10,815 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:10,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,815 INFO L82 PathProgramCache]: Analyzing trace with hash 298016926, now seen corresponding path program 2 times [2018-12-08 17:25:10,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:10,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:10,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,816 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:10,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:10,843 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:10,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:10,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:10,844 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:10,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:10,852 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:10,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 17:25:10,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:10,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,871 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:10,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-08 17:25:10,916 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:10,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 17:25:10,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 17:25:10,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:25:10,917 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 5 states. [2018-12-08 17:25:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:10,931 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-12-08 17:25:10,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 17:25:10,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-08 17:25:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:10,932 INFO L225 Difference]: With dead ends: 26 [2018-12-08 17:25:10,932 INFO L226 Difference]: Without dead ends: 25 [2018-12-08 17:25:10,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:25:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-08 17:25:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-12-08 17:25:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 17:25:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-12-08 17:25:10,936 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2018-12-08 17:25:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:10,936 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-12-08 17:25:10,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 17:25:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-12-08 17:25:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 17:25:10,937 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:10,937 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:10,937 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:10,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:10,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1368541440, now seen corresponding path program 2 times [2018-12-08 17:25:10,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:10,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:10,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:10,939 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:10,968 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:10,968 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:10,968 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:10,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:10,969 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:10,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:10,977 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:10,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 17:25:10,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:10,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:10,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:10,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:11,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-08 17:25:11,049 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:11,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 17:25:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 17:25:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:25:11,050 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 5 states. [2018-12-08 17:25:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:11,060 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-12-08 17:25:11,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 17:25:11,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-08 17:25:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:11,061 INFO L225 Difference]: With dead ends: 28 [2018-12-08 17:25:11,061 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 17:25:11,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:25:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 17:25:11,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-12-08 17:25:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 17:25:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-12-08 17:25:11,064 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 19 [2018-12-08 17:25:11,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:11,064 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-12-08 17:25:11,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 17:25:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-12-08 17:25:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 17:25:11,064 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:11,065 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:11,065 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:11,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1906552277, now seen corresponding path program 3 times [2018-12-08 17:25:11,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:11,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:11,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,066 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,092 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:11,092 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:11,092 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:11,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,092 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:11,098 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:11,098 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:11,104 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:11,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:11,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:11,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-08 17:25:11,171 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:11,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 17:25:11,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 17:25:11,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 17:25:11,172 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 6 states. [2018-12-08 17:25:11,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:11,187 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-12-08 17:25:11,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 17:25:11,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-12-08 17:25:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:11,188 INFO L225 Difference]: With dead ends: 31 [2018-12-08 17:25:11,188 INFO L226 Difference]: Without dead ends: 30 [2018-12-08 17:25:11,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 17:25:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-08 17:25:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-12-08 17:25:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-08 17:25:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-12-08 17:25:11,192 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 22 [2018-12-08 17:25:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:11,192 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-12-08 17:25:11,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 17:25:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-12-08 17:25:11,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-08 17:25:11,193 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:11,193 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:11,193 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:11,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1754295689, now seen corresponding path program 3 times [2018-12-08 17:25:11,193 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:11,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:11,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,194 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,224 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:11,224 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:11,224 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:11,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,224 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:11,233 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:11,233 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:11,239 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:11,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:11,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:11,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-08 17:25:11,340 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:11,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 17:25:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 17:25:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 17:25:11,341 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 6 states. [2018-12-08 17:25:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:11,354 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-12-08 17:25:11,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 17:25:11,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-12-08 17:25:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:11,355 INFO L225 Difference]: With dead ends: 33 [2018-12-08 17:25:11,355 INFO L226 Difference]: Without dead ends: 32 [2018-12-08 17:25:11,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 17:25:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-08 17:25:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-12-08 17:25:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-08 17:25:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-12-08 17:25:11,359 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2018-12-08 17:25:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:11,359 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-12-08 17:25:11,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 17:25:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-12-08 17:25:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-08 17:25:11,360 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:11,360 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:11,360 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:11,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1060762882, now seen corresponding path program 4 times [2018-12-08 17:25:11,360 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:11,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:11,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,362 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,396 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:11,396 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:11,396 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:11,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,396 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:11,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:11,403 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:11,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:11,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-08 17:25:11,499 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:11,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 17:25:11,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 17:25:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:25:11,499 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 7 states. [2018-12-08 17:25:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:11,518 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-12-08 17:25:11,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 17:25:11,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-12-08 17:25:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:11,519 INFO L225 Difference]: With dead ends: 36 [2018-12-08 17:25:11,519 INFO L226 Difference]: Without dead ends: 35 [2018-12-08 17:25:11,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:25:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-08 17:25:11,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-12-08 17:25:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 17:25:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-12-08 17:25:11,521 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 27 [2018-12-08 17:25:11,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:11,521 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-12-08 17:25:11,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 17:25:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-12-08 17:25:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-08 17:25:11,522 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:11,522 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:11,522 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:11,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:11,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1485878944, now seen corresponding path program 4 times [2018-12-08 17:25:11,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:11,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:11,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,524 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,548 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:11,548 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:11,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:11,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,548 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:11,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:11,554 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:11,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:11,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-08 17:25:11,679 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:11,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 17:25:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 17:25:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:25:11,680 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 7 states. [2018-12-08 17:25:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:11,692 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-12-08 17:25:11,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 17:25:11,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2018-12-08 17:25:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:11,693 INFO L225 Difference]: With dead ends: 38 [2018-12-08 17:25:11,693 INFO L226 Difference]: Without dead ends: 37 [2018-12-08 17:25:11,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:25:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-08 17:25:11,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-12-08 17:25:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-08 17:25:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-12-08 17:25:11,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2018-12-08 17:25:11,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:11,696 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-12-08 17:25:11,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 17:25:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-12-08 17:25:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-08 17:25:11,696 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:11,696 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:11,697 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:11,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:11,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1886617739, now seen corresponding path program 5 times [2018-12-08 17:25:11,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:11,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:11,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,698 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,737 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:11,737 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:11,737 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:11,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,737 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:11,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:11,743 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:11,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-08 17:25:11,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:11,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:11,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-08 17:25:11,877 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:11,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 17:25:11,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 17:25:11,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 17:25:11,878 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 8 states. [2018-12-08 17:25:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:11,896 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-12-08 17:25:11,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 17:25:11,897 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-12-08 17:25:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:11,897 INFO L225 Difference]: With dead ends: 41 [2018-12-08 17:25:11,897 INFO L226 Difference]: Without dead ends: 40 [2018-12-08 17:25:11,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 17:25:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-08 17:25:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-12-08 17:25:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-08 17:25:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-12-08 17:25:11,900 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2018-12-08 17:25:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:11,900 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-12-08 17:25:11,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 17:25:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-12-08 17:25:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-08 17:25:11,901 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:11,901 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:11,901 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:11,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash -563446761, now seen corresponding path program 5 times [2018-12-08 17:25:11,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:11,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:11,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:11,903 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:11,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,939 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:11,939 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:11,939 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:11,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:11,939 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:11,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:11,947 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:11,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-08 17:25:11,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:11,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:12,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-08 17:25:12,113 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:12,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 17:25:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 17:25:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 17:25:12,113 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 8 states. [2018-12-08 17:25:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:12,129 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-12-08 17:25:12,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 17:25:12,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2018-12-08 17:25:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:12,130 INFO L225 Difference]: With dead ends: 43 [2018-12-08 17:25:12,130 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 17:25:12,130 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 17:25:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 17:25:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-12-08 17:25:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-08 17:25:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-12-08 17:25:12,133 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 34 [2018-12-08 17:25:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:12,134 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-12-08 17:25:12,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 17:25:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-12-08 17:25:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 17:25:12,134 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:12,134 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:12,135 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:12,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash -910213794, now seen corresponding path program 6 times [2018-12-08 17:25:12,135 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:12,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:12,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:12,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:12,136 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:12,177 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:12,177 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:12,177 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:12,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:12,177 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:12,185 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:12,186 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:12,194 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:12,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:12,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,240 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:12,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-12-08 17:25:12,310 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:12,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 17:25:12,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 17:25:12,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-08 17:25:12,311 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 9 states. [2018-12-08 17:25:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:12,328 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-12-08 17:25:12,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 17:25:12,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-12-08 17:25:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:12,329 INFO L225 Difference]: With dead ends: 46 [2018-12-08 17:25:12,329 INFO L226 Difference]: Without dead ends: 45 [2018-12-08 17:25:12,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-08 17:25:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-08 17:25:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-12-08 17:25:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-08 17:25:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-12-08 17:25:12,331 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 37 [2018-12-08 17:25:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:12,332 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-12-08 17:25:12,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 17:25:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-12-08 17:25:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-08 17:25:12,332 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:12,332 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:12,332 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:12,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1457873856, now seen corresponding path program 6 times [2018-12-08 17:25:12,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:12,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:12,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:12,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:12,334 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:12,373 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:12,373 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:12,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:12,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:12,373 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:12,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:12,383 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:12,389 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:12,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:12,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:12,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-12-08 17:25:12,572 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:12,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 17:25:12,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 17:25:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-08 17:25:12,573 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 9 states. [2018-12-08 17:25:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:12,584 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-12-08 17:25:12,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 17:25:12,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-12-08 17:25:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:12,585 INFO L225 Difference]: With dead ends: 48 [2018-12-08 17:25:12,585 INFO L226 Difference]: Without dead ends: 47 [2018-12-08 17:25:12,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-08 17:25:12,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-08 17:25:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2018-12-08 17:25:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-08 17:25:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-12-08 17:25:12,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 39 [2018-12-08 17:25:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:12,587 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-12-08 17:25:12,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 17:25:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-12-08 17:25:12,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-08 17:25:12,588 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:12,588 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:12,588 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:12,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash 810797333, now seen corresponding path program 7 times [2018-12-08 17:25:12,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:12,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:12,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:12,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:12,589 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:12,629 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:12,629 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:12,630 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:12,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:12,630 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:12,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:12,637 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:12,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:12,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-08 17:25:12,763 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:12,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 17:25:12,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 17:25:12,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-08 17:25:12,763 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 10 states. [2018-12-08 17:25:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:12,784 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-12-08 17:25:12,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 17:25:12,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-12-08 17:25:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:12,785 INFO L225 Difference]: With dead ends: 51 [2018-12-08 17:25:12,785 INFO L226 Difference]: Without dead ends: 50 [2018-12-08 17:25:12,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-08 17:25:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-08 17:25:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-12-08 17:25:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-08 17:25:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-12-08 17:25:12,788 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 42 [2018-12-08 17:25:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:12,788 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-12-08 17:25:12,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 17:25:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-12-08 17:25:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-08 17:25:12,789 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:12,789 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:12,789 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:12,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:12,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1787157943, now seen corresponding path program 7 times [2018-12-08 17:25:12,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:12,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:12,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:12,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:12,791 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:12,835 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:12,836 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:12,836 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:12,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:12,836 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:12,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:12,844 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:12,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:12,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:13,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:13,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-08 17:25:13,230 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:13,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 17:25:13,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 17:25:13,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-08 17:25:13,231 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 10 states. [2018-12-08 17:25:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:13,248 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-12-08 17:25:13,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 17:25:13,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2018-12-08 17:25:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:13,249 INFO L225 Difference]: With dead ends: 53 [2018-12-08 17:25:13,249 INFO L226 Difference]: Without dead ends: 52 [2018-12-08 17:25:13,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-08 17:25:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-08 17:25:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2018-12-08 17:25:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-08 17:25:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-12-08 17:25:13,252 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 44 [2018-12-08 17:25:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:13,252 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-12-08 17:25:13,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 17:25:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-12-08 17:25:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-12-08 17:25:13,252 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:13,252 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:13,252 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:13,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash 807729086, now seen corresponding path program 8 times [2018-12-08 17:25:13,253 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:13,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:13,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:13,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:13,254 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:13,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:13,299 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:13,299 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:13,299 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:13,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:13,300 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:13,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:13,305 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:13,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-08 17:25:13,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:13,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:13,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:13,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:13,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-12-08 17:25:13,474 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:13,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 17:25:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 17:25:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-08 17:25:13,475 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 11 states. [2018-12-08 17:25:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:13,506 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-12-08 17:25:13,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 17:25:13,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-12-08 17:25:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:13,506 INFO L225 Difference]: With dead ends: 56 [2018-12-08 17:25:13,507 INFO L226 Difference]: Without dead ends: 55 [2018-12-08 17:25:13,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-08 17:25:13,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-08 17:25:13,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-12-08 17:25:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-12-08 17:25:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-12-08 17:25:13,509 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 47 [2018-12-08 17:25:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:13,510 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-12-08 17:25:13,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 17:25:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-12-08 17:25:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-08 17:25:13,510 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:13,510 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:13,510 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:13,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1161427424, now seen corresponding path program 8 times [2018-12-08 17:25:13,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:13,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:13,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:13,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:13,511 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:13,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:13,553 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:13,553 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:13,553 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:13,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:13,553 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:13,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:13,560 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:13,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-08 17:25:13,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:13,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:13,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 167 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:17,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:17,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-12-08 17:25:17,868 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:17,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 17:25:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 17:25:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=189, Unknown=1, NotChecked=0, Total=380 [2018-12-08 17:25:17,869 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 11 states. [2018-12-08 17:25:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:17,884 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-12-08 17:25:17,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 17:25:17,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-12-08 17:25:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:17,884 INFO L225 Difference]: With dead ends: 58 [2018-12-08 17:25:17,884 INFO L226 Difference]: Without dead ends: 57 [2018-12-08 17:25:17,884 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=190, Invalid=189, Unknown=1, NotChecked=0, Total=380 [2018-12-08 17:25:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-08 17:25:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-12-08 17:25:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-08 17:25:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-12-08 17:25:17,886 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 49 [2018-12-08 17:25:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:17,886 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-12-08 17:25:17,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 17:25:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-12-08 17:25:17,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-08 17:25:17,887 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:17,887 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:17,887 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:17,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash 172198581, now seen corresponding path program 9 times [2018-12-08 17:25:17,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:17,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:17,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:17,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:17,888 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:17,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:17,932 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:17,932 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:17,932 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:17,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:17,932 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:17,938 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:17,938 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:17,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:17,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:17,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:18,007 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:18,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:18,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-12-08 17:25:18,122 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:18,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 17:25:18,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 17:25:18,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-08 17:25:18,123 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 12 states. [2018-12-08 17:25:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:18,146 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-12-08 17:25:18,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 17:25:18,146 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-12-08 17:25:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:18,147 INFO L225 Difference]: With dead ends: 61 [2018-12-08 17:25:18,147 INFO L226 Difference]: Without dead ends: 60 [2018-12-08 17:25:18,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-08 17:25:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-08 17:25:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-12-08 17:25:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-08 17:25:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-12-08 17:25:18,149 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 52 [2018-12-08 17:25:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:18,150 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-12-08 17:25:18,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 17:25:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-12-08 17:25:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-08 17:25:18,150 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:18,150 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:18,151 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:18,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:18,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2020886697, now seen corresponding path program 9 times [2018-12-08 17:25:18,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:18,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:18,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:18,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:18,152 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:18,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:18,206 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:18,206 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:18,206 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:18,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:18,206 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:18,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:18,214 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:18,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:18,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:18,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:18,287 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 211 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:28,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:28,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-12-08 17:25:28,416 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:28,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 17:25:28,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 17:25:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=230, Unknown=2, NotChecked=0, Total=462 [2018-12-08 17:25:28,417 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 12 states. [2018-12-08 17:25:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:28,437 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-12-08 17:25:28,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 17:25:28,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2018-12-08 17:25:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:28,437 INFO L225 Difference]: With dead ends: 63 [2018-12-08 17:25:28,437 INFO L226 Difference]: Without dead ends: 62 [2018-12-08 17:25:28,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=230, Invalid=230, Unknown=2, NotChecked=0, Total=462 [2018-12-08 17:25:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-08 17:25:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-12-08 17:25:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-08 17:25:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-12-08 17:25:28,439 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 54 [2018-12-08 17:25:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:28,440 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-12-08 17:25:28,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 17:25:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-12-08 17:25:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-08 17:25:28,440 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:28,440 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:28,440 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:28,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:28,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1678951906, now seen corresponding path program 10 times [2018-12-08 17:25:28,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:28,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:28,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:28,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:28,441 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:28,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:28,491 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:28,491 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:28,491 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:28,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:28,491 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:28,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:28,500 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:28,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:28,578 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:28,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:28,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-12-08 17:25:28,704 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:28,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 17:25:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 17:25:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-08 17:25:28,705 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 13 states. [2018-12-08 17:25:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:28,729 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-12-08 17:25:28,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 17:25:28,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-12-08 17:25:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:28,730 INFO L225 Difference]: With dead ends: 66 [2018-12-08 17:25:28,730 INFO L226 Difference]: Without dead ends: 65 [2018-12-08 17:25:28,730 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 93 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-08 17:25:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-08 17:25:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-12-08 17:25:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-08 17:25:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-12-08 17:25:28,732 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 57 [2018-12-08 17:25:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:28,732 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-12-08 17:25:28,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 17:25:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-12-08 17:25:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-08 17:25:28,733 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:28,733 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:28,733 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:28,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1434923136, now seen corresponding path program 10 times [2018-12-08 17:25:28,733 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:28,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:28,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:28,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:28,734 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:28,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:28,791 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:28,791 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:28,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:28,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:28,791 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:28,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:28,800 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:28,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:28,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:35,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:35,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-12-08 17:25:35,233 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:35,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 17:25:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 17:25:35,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=276, Unknown=1, NotChecked=0, Total=552 [2018-12-08 17:25:35,234 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 13 states. [2018-12-08 17:25:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:35,253 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-12-08 17:25:35,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 17:25:35,253 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2018-12-08 17:25:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:35,254 INFO L225 Difference]: With dead ends: 68 [2018-12-08 17:25:35,254 INFO L226 Difference]: Without dead ends: 67 [2018-12-08 17:25:35,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=275, Invalid=276, Unknown=1, NotChecked=0, Total=552 [2018-12-08 17:25:35,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-08 17:25:35,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-12-08 17:25:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-08 17:25:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-12-08 17:25:35,255 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 59 [2018-12-08 17:25:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:35,255 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-12-08 17:25:35,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 17:25:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-12-08 17:25:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-08 17:25:35,256 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:35,256 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:35,256 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:35,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash -14302123, now seen corresponding path program 11 times [2018-12-08 17:25:35,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:35,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:35,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:35,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:35,257 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:35,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:35,308 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:35,308 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:35,308 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:35,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:35,308 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:35,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:35,316 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:35,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-08 17:25:35,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:35,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:35,405 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:35,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:35,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-12-08 17:25:35,533 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:35,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 17:25:35,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 17:25:35,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-08 17:25:35,534 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 14 states. [2018-12-08 17:25:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:35,565 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-12-08 17:25:35,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 17:25:35,565 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2018-12-08 17:25:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:35,566 INFO L225 Difference]: With dead ends: 71 [2018-12-08 17:25:35,566 INFO L226 Difference]: Without dead ends: 70 [2018-12-08 17:25:35,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-08 17:25:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-08 17:25:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2018-12-08 17:25:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-08 17:25:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-12-08 17:25:35,568 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 62 [2018-12-08 17:25:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:35,569 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-12-08 17:25:35,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 17:25:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-12-08 17:25:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-08 17:25:35,569 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:35,569 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:35,569 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:35,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash -859436809, now seen corresponding path program 11 times [2018-12-08 17:25:35,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:35,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:35,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:35,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:35,571 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:35,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:35,628 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:35,628 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:35,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:35,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:35,629 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:35,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:35,634 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:35,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-08 17:25:35,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:35,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:35,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:36,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:36,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-12-08 17:25:36,036 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:36,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 17:25:36,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 17:25:36,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-08 17:25:36,037 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 14 states. [2018-12-08 17:25:36,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:36,067 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-12-08 17:25:36,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 17:25:36,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2018-12-08 17:25:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:36,068 INFO L225 Difference]: With dead ends: 73 [2018-12-08 17:25:36,068 INFO L226 Difference]: Without dead ends: 72 [2018-12-08 17:25:36,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-08 17:25:36,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-08 17:25:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-12-08 17:25:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-08 17:25:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-12-08 17:25:36,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 64 [2018-12-08 17:25:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:36,070 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-12-08 17:25:36,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 17:25:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-12-08 17:25:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-08 17:25:36,070 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:36,070 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:36,070 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:36,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:36,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1181875074, now seen corresponding path program 12 times [2018-12-08 17:25:36,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:36,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:36,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:36,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:36,071 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:36,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:36,172 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:36,172 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:36,172 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:36,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:36,172 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:36,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:36,180 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:36,189 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:36,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:36,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:36,296 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:36,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:36,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-12-08 17:25:36,437 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:36,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 17:25:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 17:25:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-08 17:25:36,437 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 15 states. [2018-12-08 17:25:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:36,465 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-12-08 17:25:36,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 17:25:36,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2018-12-08 17:25:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:36,465 INFO L225 Difference]: With dead ends: 76 [2018-12-08 17:25:36,465 INFO L226 Difference]: Without dead ends: 75 [2018-12-08 17:25:36,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-08 17:25:36,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-12-08 17:25:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-12-08 17:25:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-08 17:25:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-12-08 17:25:36,467 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 67 [2018-12-08 17:25:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:36,468 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-12-08 17:25:36,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 17:25:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-12-08 17:25:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-08 17:25:36,468 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:36,468 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:36,468 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:36,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:36,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1910578464, now seen corresponding path program 12 times [2018-12-08 17:25:36,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:36,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:36,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:36,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:36,469 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:36,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:36,538 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:36,538 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:36,538 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:36,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:36,538 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:36,546 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:36,546 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:36,555 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:36,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:36,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:36,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:37,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:37,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-12-08 17:25:37,067 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:37,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 17:25:37,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 17:25:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-08 17:25:37,068 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 15 states. [2018-12-08 17:25:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:37,091 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-12-08 17:25:37,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 17:25:37,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2018-12-08 17:25:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:37,092 INFO L225 Difference]: With dead ends: 78 [2018-12-08 17:25:37,092 INFO L226 Difference]: Without dead ends: 77 [2018-12-08 17:25:37,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-08 17:25:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-08 17:25:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-12-08 17:25:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-08 17:25:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-12-08 17:25:37,095 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 69 [2018-12-08 17:25:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:37,095 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-12-08 17:25:37,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 17:25:37,095 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-12-08 17:25:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-08 17:25:37,096 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:37,096 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:37,096 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:37,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1136364043, now seen corresponding path program 13 times [2018-12-08 17:25:37,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:37,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:37,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:37,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:37,097 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:37,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:37,175 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:37,175 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:37,175 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:37,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:37,175 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:37,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:37,181 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:37,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:37,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:37,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:37,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-12-08 17:25:37,461 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:37,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-08 17:25:37,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-08 17:25:37,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-08 17:25:37,461 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 16 states. [2018-12-08 17:25:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:37,507 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-12-08 17:25:37,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 17:25:37,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2018-12-08 17:25:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:37,508 INFO L225 Difference]: With dead ends: 81 [2018-12-08 17:25:37,508 INFO L226 Difference]: Without dead ends: 80 [2018-12-08 17:25:37,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 117 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-08 17:25:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-08 17:25:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-12-08 17:25:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-08 17:25:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-12-08 17:25:37,511 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 72 [2018-12-08 17:25:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:37,511 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-12-08 17:25:37,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-08 17:25:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-12-08 17:25:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-12-08 17:25:37,511 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:37,511 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:37,511 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:37,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1124150633, now seen corresponding path program 13 times [2018-12-08 17:25:37,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:37,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:37,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:37,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:37,512 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:37,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:37,579 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:37,579 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:37,579 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:37,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:37,579 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:37,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:37,589 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:37,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:37,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:38,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:38,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-12-08 17:25:38,083 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:38,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-08 17:25:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-08 17:25:38,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-08 17:25:38,084 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 16 states. [2018-12-08 17:25:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:38,106 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-12-08 17:25:38,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 17:25:38,106 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2018-12-08 17:25:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:38,107 INFO L225 Difference]: With dead ends: 83 [2018-12-08 17:25:38,107 INFO L226 Difference]: Without dead ends: 82 [2018-12-08 17:25:38,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 121 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-08 17:25:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-08 17:25:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-12-08 17:25:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-12-08 17:25:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-12-08 17:25:38,110 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 74 [2018-12-08 17:25:38,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:38,110 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-12-08 17:25:38,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-08 17:25:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-12-08 17:25:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-12-08 17:25:38,111 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:38,111 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:38,111 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:38,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:38,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1711450402, now seen corresponding path program 14 times [2018-12-08 17:25:38,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:38,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:38,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:38,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:38,113 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:38,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:38,198 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:38,198 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:38,199 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:38,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:38,199 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:38,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:38,205 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:38,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-08 17:25:38,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:38,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:38,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:38,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:38,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2018-12-08 17:25:38,534 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:38,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 17:25:38,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 17:25:38,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 17:25:38,535 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 17 states. [2018-12-08 17:25:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:38,571 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-12-08 17:25:38,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 17:25:38,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2018-12-08 17:25:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:38,572 INFO L225 Difference]: With dead ends: 86 [2018-12-08 17:25:38,572 INFO L226 Difference]: Without dead ends: 85 [2018-12-08 17:25:38,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 17:25:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-08 17:25:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2018-12-08 17:25:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-08 17:25:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-12-08 17:25:38,574 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 77 [2018-12-08 17:25:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:38,574 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-12-08 17:25:38,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 17:25:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-12-08 17:25:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-08 17:25:38,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:38,575 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:38,575 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:38,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:38,575 INFO L82 PathProgramCache]: Analyzing trace with hash 268639552, now seen corresponding path program 14 times [2018-12-08 17:25:38,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:38,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:38,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:38,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:38,576 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:38,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:38,656 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:38,656 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:38,656 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:38,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:38,657 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:38,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:38,663 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:38,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-08 17:25:38,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:38,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:38,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:39,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:39,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2018-12-08 17:25:39,241 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:39,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 17:25:39,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 17:25:39,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 17:25:39,242 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 17 states. [2018-12-08 17:25:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:39,268 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-12-08 17:25:39,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 17:25:39,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2018-12-08 17:25:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:39,268 INFO L225 Difference]: With dead ends: 88 [2018-12-08 17:25:39,268 INFO L226 Difference]: Without dead ends: 87 [2018-12-08 17:25:39,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 129 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 17:25:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-12-08 17:25:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-12-08 17:25:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-08 17:25:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-12-08 17:25:39,270 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 79 [2018-12-08 17:25:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:39,270 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-12-08 17:25:39,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 17:25:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-12-08 17:25:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-08 17:25:39,271 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:39,271 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:39,271 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:39,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:39,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1516871573, now seen corresponding path program 15 times [2018-12-08 17:25:39,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:39,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:39,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:39,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:39,272 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:39,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:39,364 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:39,364 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:39,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:39,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:39,365 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/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 [2018-12-08 17:25:39,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:39,374 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:39,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:39,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:39,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:39,516 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:39,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:39,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-12-08 17:25:39,734 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:39,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-08 17:25:39,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-08 17:25:39,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-08 17:25:39,735 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 18 states. [2018-12-08 17:25:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:39,769 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-12-08 17:25:39,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-08 17:25:39,769 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-12-08 17:25:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:39,770 INFO L225 Difference]: With dead ends: 91 [2018-12-08 17:25:39,770 INFO L226 Difference]: Without dead ends: 90 [2018-12-08 17:25:39,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-08 17:25:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-08 17:25:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-12-08 17:25:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-08 17:25:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-12-08 17:25:39,772 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 82 [2018-12-08 17:25:39,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:39,772 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-12-08 17:25:39,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-08 17:25:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-12-08 17:25:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-12-08 17:25:39,772 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:39,772 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:39,772 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:39,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1719669815, now seen corresponding path program 15 times [2018-12-08 17:25:39,773 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:39,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:39,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:39,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:39,773 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:39,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:39,860 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:39,861 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:39,861 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:39,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:39,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:25:39,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:39,867 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:39,876 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:39,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:39,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:40,005 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:40,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:40,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-12-08 17:25:40,406 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:40,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-08 17:25:40,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-08 17:25:40,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-08 17:25:40,407 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 18 states. [2018-12-08 17:25:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:40,428 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-12-08 17:25:40,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-08 17:25:40,428 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2018-12-08 17:25:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:40,429 INFO L225 Difference]: With dead ends: 93 [2018-12-08 17:25:40,429 INFO L226 Difference]: Without dead ends: 92 [2018-12-08 17:25:40,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 137 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-08 17:25:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-12-08 17:25:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2018-12-08 17:25:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-08 17:25:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-12-08 17:25:40,431 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 84 [2018-12-08 17:25:40,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:40,431 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-12-08 17:25:40,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-08 17:25:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-12-08 17:25:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-08 17:25:40,431 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:40,431 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:40,431 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:40,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:40,431 INFO L82 PathProgramCache]: Analyzing trace with hash 313602366, now seen corresponding path program 16 times [2018-12-08 17:25:40,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:40,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:40,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:40,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:40,432 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:40,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:40,532 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:40,533 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:40,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:40,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:40,533 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:25:40,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:40,538 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:40,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:40,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:40,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:40,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2018-12-08 17:25:40,928 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:40,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-08 17:25:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-08 17:25:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 17:25:40,928 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 19 states. [2018-12-08 17:25:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:40,973 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-12-08 17:25:40,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 17:25:40,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-12-08 17:25:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:40,974 INFO L225 Difference]: With dead ends: 96 [2018-12-08 17:25:40,974 INFO L226 Difference]: Without dead ends: 95 [2018-12-08 17:25:40,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 141 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 17:25:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-08 17:25:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-12-08 17:25:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-08 17:25:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-12-08 17:25:40,977 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 87 [2018-12-08 17:25:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:40,977 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-12-08 17:25:40,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-08 17:25:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-12-08 17:25:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-12-08 17:25:40,977 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:40,977 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:40,977 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:40,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash 724164512, now seen corresponding path program 16 times [2018-12-08 17:25:40,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:40,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:40,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:40,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:40,978 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:41,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:41,076 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:41,076 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:41,076 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:41,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:41,076 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:25:41,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:41,083 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:41,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:41,237 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:41,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:41,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2018-12-08 17:25:41,736 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:41,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-08 17:25:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-08 17:25:41,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 17:25:41,736 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 19 states. [2018-12-08 17:25:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:41,773 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-12-08 17:25:41,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 17:25:41,774 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2018-12-08 17:25:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:41,774 INFO L225 Difference]: With dead ends: 98 [2018-12-08 17:25:41,774 INFO L226 Difference]: Without dead ends: 97 [2018-12-08 17:25:41,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 145 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 17:25:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-08 17:25:41,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2018-12-08 17:25:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-12-08 17:25:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-12-08 17:25:41,778 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 89 [2018-12-08 17:25:41,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:41,778 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-12-08 17:25:41,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-08 17:25:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-12-08 17:25:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-12-08 17:25:41,779 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:41,779 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:41,779 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:41,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash -35700427, now seen corresponding path program 17 times [2018-12-08 17:25:41,779 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:41,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:41,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:41,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:41,780 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:41,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:41,900 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:41,900 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:41,900 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:41,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:41,900 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:25:41,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:41,907 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:41,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-08 17:25:41,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:41,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:42,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:42,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:42,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-12-08 17:25:42,333 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:42,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-08 17:25:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-08 17:25:42,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 17:25:42,334 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 20 states. [2018-12-08 17:25:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:42,384 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-12-08 17:25:42,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-08 17:25:42,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2018-12-08 17:25:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:42,385 INFO L225 Difference]: With dead ends: 101 [2018-12-08 17:25:42,385 INFO L226 Difference]: Without dead ends: 100 [2018-12-08 17:25:42,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 149 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 17:25:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-08 17:25:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2018-12-08 17:25:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-08 17:25:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-12-08 17:25:42,387 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 92 [2018-12-08 17:25:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:42,387 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-12-08 17:25:42,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-08 17:25:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-12-08 17:25:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-12-08 17:25:42,387 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:42,387 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:42,388 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:42,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:42,388 INFO L82 PathProgramCache]: Analyzing trace with hash 51629527, now seen corresponding path program 17 times [2018-12-08 17:25:42,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:42,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:42,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:42,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:42,388 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:42,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:42,501 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:42,501 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:42,501 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:42,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:42,501 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:25:42,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:25:42,510 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 17:25:42,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-08 17:25:42,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:42,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:42,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:43,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:43,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-12-08 17:25:43,416 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:43,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-08 17:25:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-08 17:25:43,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 17:25:43,416 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 20 states. [2018-12-08 17:25:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:43,447 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-12-08 17:25:43,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-08 17:25:43,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2018-12-08 17:25:43,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:43,447 INFO L225 Difference]: With dead ends: 103 [2018-12-08 17:25:43,447 INFO L226 Difference]: Without dead ends: 102 [2018-12-08 17:25:43,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 153 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 17:25:43,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-12-08 17:25:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-12-08 17:25:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-12-08 17:25:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-12-08 17:25:43,449 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 94 [2018-12-08 17:25:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:43,450 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-12-08 17:25:43,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-08 17:25:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-12-08 17:25:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-08 17:25:43,450 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:43,450 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:43,450 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:43,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:43,450 INFO L82 PathProgramCache]: Analyzing trace with hash 496997278, now seen corresponding path program 18 times [2018-12-08 17:25:43,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:43,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:43,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:43,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:43,451 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:43,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:43,562 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:43,563 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:43,563 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:43,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:43,563 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:25:43,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:43,569 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:43,580 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:43,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:43,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:43,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:43,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:43,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2018-12-08 17:25:43,984 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:43,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-08 17:25:43,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-08 17:25:43,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-08 17:25:43,985 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 21 states. [2018-12-08 17:25:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:44,026 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-12-08 17:25:44,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-08 17:25:44,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2018-12-08 17:25:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:44,027 INFO L225 Difference]: With dead ends: 106 [2018-12-08 17:25:44,027 INFO L226 Difference]: Without dead ends: 105 [2018-12-08 17:25:44,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 157 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-08 17:25:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-08 17:25:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-12-08 17:25:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-08 17:25:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-12-08 17:25:44,029 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 97 [2018-12-08 17:25:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:44,029 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-12-08 17:25:44,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-08 17:25:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-12-08 17:25:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-08 17:25:44,030 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:44,030 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:44,030 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:44,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:44,030 INFO L82 PathProgramCache]: Analyzing trace with hash 873015808, now seen corresponding path program 18 times [2018-12-08 17:25:44,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:44,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:44,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:44,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:44,031 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:44,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:44,146 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:44,146 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:44,146 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:44,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:44,147 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:25:44,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:25:44,153 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 17:25:44,165 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:25:44,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:25:44,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:44,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:44,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:44,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 38 [2018-12-08 17:25:44,868 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:44,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-08 17:25:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-08 17:25:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-08 17:25:44,868 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 21 states. [2018-12-08 17:25:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:44,907 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-12-08 17:25:44,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-08 17:25:44,907 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2018-12-08 17:25:44,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:44,907 INFO L225 Difference]: With dead ends: 108 [2018-12-08 17:25:44,907 INFO L226 Difference]: Without dead ends: 107 [2018-12-08 17:25:44,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 19 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-08 17:25:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-12-08 17:25:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-12-08 17:25:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-12-08 17:25:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-12-08 17:25:44,910 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 99 [2018-12-08 17:25:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:44,910 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-12-08 17:25:44,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-08 17:25:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-12-08 17:25:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-12-08 17:25:44,911 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:44,911 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:44,911 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:44,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1987009237, now seen corresponding path program 19 times [2018-12-08 17:25:44,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:44,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:44,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:25:44,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:44,912 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:45,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:45,035 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:25:45,035 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 17:25:45,035 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 17:25:45,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:25:45,035 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:25:45,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:45,041 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:25:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:25:45,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:25:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:45,250 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:25:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:25:45,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:25:45,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2018-12-08 17:25:45,482 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:25:45,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-08 17:25:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-08 17:25:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-08 17:25:45,483 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 22 states. [2018-12-08 17:25:45,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:25:45,528 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-12-08 17:25:45,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-08 17:25:45,528 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2018-12-08 17:25:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:25:45,529 INFO L225 Difference]: With dead ends: 111 [2018-12-08 17:25:45,529 INFO L226 Difference]: Without dead ends: 110 [2018-12-08 17:25:45,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 165 SyntacticMatches, 19 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-08 17:25:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-12-08 17:25:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2018-12-08 17:25:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-08 17:25:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-12-08 17:25:45,532 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 102 [2018-12-08 17:25:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:25:45,532 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-12-08 17:25:45,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-08 17:25:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-12-08 17:25:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-12-08 17:25:45,533 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:25:45,533 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-12-08 17:25:45,533 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 17:25:45,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:25:45,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1744568457, now seen corresponding path program 19 times [2018-12-08 17:25:45,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:25:45,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:45,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:25:45,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:25:45,534 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:25:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 17:25:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 17:25:45,554 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 17:25:45,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 05:25:45 BoogieIcfgContainer [2018-12-08 17:25:45,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 17:25:45,573 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 17:25:45,574 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 17:25:45,574 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 17:25:45,574 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:25:10" (3/4) ... [2018-12-08 17:25:45,576 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 17:25:45,606 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c3fe4f94-ddcf-4826-8e5c-95e584a8033f/bin-2019/utaipan/witness.graphml [2018-12-08 17:25:45,606 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 17:25:45,607 INFO L168 Benchmark]: Toolchain (without parser) took 35703.99 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 415.8 MB). Free memory was 958.7 MB in the beginning and 859.0 MB in the end (delta: 99.7 MB). Peak memory consumption was 515.4 MB. Max. memory is 11.5 GB. [2018-12-08 17:25:45,607 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:25:45,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 113.89 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 950.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2018-12-08 17:25:45,608 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.07 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 947.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-08 17:25:45,608 INFO L168 Benchmark]: Boogie Preprocessor took 11.87 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:25:45,608 INFO L168 Benchmark]: RCFGBuilder took 138.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-12-08 17:25:45,609 INFO L168 Benchmark]: TraceAbstraction took 35392.75 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 282.6 MB). Free memory was 1.1 GB in the beginning and 859.0 MB in the end (delta: 257.7 MB). Peak memory consumption was 540.3 MB. Max. memory is 11.5 GB. [2018-12-08 17:25:45,609 INFO L168 Benchmark]: Witness Printer took 32.47 ms. Allocated memory is still 1.4 GB. Free memory was 859.0 MB in the beginning and 859.0 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-12-08 17:25:45,610 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 113.89 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 950.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.07 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 947.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.87 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 138.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 35392.75 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 282.6 MB). Free memory was 1.1 GB in the beginning and 859.0 MB in the end (delta: 257.7 MB). Peak memory consumption was 540.3 MB. Max. memory is 11.5 GB. * Witness Printer took 32.47 ms. Allocated memory is still 1.4 GB. Free memory was 859.0 MB in the beginning and 859.0 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y; [L16] x = 1 [L17] y = 1 VAL [x=1, y=1] [L18] COND TRUE x >= 0 VAL [x=1, y=1] [L19] EXPR 2*x [L19] x = 2*x VAL [x=2, y=1] [L20] EXPR 3*y [L20] y = 3*y VAL [x=2, y=3] [L18] COND TRUE x >= 0 VAL [x=2, y=3] [L19] EXPR 2*x [L19] x = 2*x VAL [x=4, y=3] [L20] EXPR 3*y [L20] y = 3*y VAL [x=4, y=9] [L18] COND TRUE x >= 0 VAL [x=4, y=9] [L19] EXPR 2*x [L19] x = 2*x VAL [x=8, y=9] [L20] EXPR 3*y [L20] y = 3*y VAL [x=8, y=27] [L18] COND TRUE x >= 0 VAL [x=8, y=27] [L19] EXPR 2*x [L19] x = 2*x VAL [x=16, y=27] [L20] EXPR 3*y [L20] y = 3*y VAL [x=16, y=81] [L18] COND TRUE x >= 0 VAL [x=16, y=81] [L19] EXPR 2*x [L19] x = 2*x VAL [x=32, y=81] [L20] EXPR 3*y [L20] y = 3*y VAL [x=32, y=243] [L18] COND TRUE x >= 0 VAL [x=32, y=243] [L19] EXPR 2*x [L19] x = 2*x VAL [x=64, y=243] [L20] EXPR 3*y [L20] y = 3*y VAL [x=64, y=729] [L18] COND TRUE x >= 0 VAL [x=64, y=729] [L19] EXPR 2*x [L19] x = 2*x VAL [x=128, y=729] [L20] EXPR 3*y [L20] y = 3*y VAL [x=128, y=2187] [L18] COND TRUE x >= 0 VAL [x=128, y=2187] [L19] EXPR 2*x [L19] x = 2*x VAL [x=256, y=2187] [L20] EXPR 3*y [L20] y = 3*y VAL [x=256, y=6561] [L18] COND TRUE x >= 0 VAL [x=256, y=6561] [L19] EXPR 2*x [L19] x = 2*x VAL [x=512, y=6561] [L20] EXPR 3*y [L20] y = 3*y VAL [x=512, y=19683] [L18] COND TRUE x >= 0 VAL [x=512, y=19683] [L19] EXPR 2*x [L19] x = 2*x VAL [x=1024, y=19683] [L20] EXPR 3*y [L20] y = 3*y VAL [x=1024, y=59049] [L18] COND TRUE x >= 0 VAL [x=1024, y=59049] [L19] EXPR 2*x [L19] x = 2*x VAL [x=2048, y=59049] [L20] EXPR 3*y [L20] y = 3*y VAL [x=2048, y=177147] [L18] COND TRUE x >= 0 VAL [x=2048, y=177147] [L19] EXPR 2*x [L19] x = 2*x VAL [x=4096, y=177147] [L20] EXPR 3*y [L20] y = 3*y VAL [x=4096, y=531441] [L18] COND TRUE x >= 0 VAL [x=4096, y=531441] [L19] EXPR 2*x [L19] x = 2*x VAL [x=8192, y=531441] [L20] EXPR 3*y [L20] y = 3*y VAL [x=8192, y=1594323] [L18] COND TRUE x >= 0 VAL [x=8192, y=1594323] [L19] EXPR 2*x [L19] x = 2*x VAL [x=16384, y=1594323] [L20] EXPR 3*y [L20] y = 3*y VAL [x=16384, y=4782969] [L18] COND TRUE x >= 0 VAL [x=16384, y=4782969] [L19] EXPR 2*x [L19] x = 2*x VAL [x=32768, y=4782969] [L20] EXPR 3*y [L20] y = 3*y VAL [x=32768, y=14348907] [L18] COND TRUE x >= 0 VAL [x=32768, y=14348907] [L19] EXPR 2*x [L19] x = 2*x VAL [x=65536, y=14348907] [L20] EXPR 3*y [L20] y = 3*y VAL [x=65536, y=43046721] [L18] COND TRUE x >= 0 VAL [x=65536, y=43046721] [L19] EXPR 2*x [L19] x = 2*x VAL [x=131072, y=43046721] [L20] EXPR 3*y [L20] y = 3*y VAL [x=131072, y=129140163] [L18] COND TRUE x >= 0 VAL [x=131072, y=129140163] [L19] EXPR 2*x [L19] x = 2*x VAL [x=262144, y=129140163] [L20] EXPR 3*y [L20] y = 3*y VAL [x=262144, y=387420489] [L18] COND TRUE x >= 0 VAL [x=262144, y=387420489] [L19] EXPR 2*x [L19] x = 2*x VAL [x=524288, y=387420489] [L20] EXPR 3*y [L20] y = 3*y VAL [x=524288, y=1162261467] [L18] COND TRUE x >= 0 VAL [x=524288, y=1162261467] [L19] EXPR 2*x [L19] x = 2*x VAL [x=1048576, y=1162261467] [L20] 3*y VAL [x=1048576, y=1162261467] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 4 error locations. UNSAFE Result, 35.3s OverallTime, 42 OverallIterations, 20 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 393 SDtfs, 412 SDslu, 2581 SDs, 0 SdLazy, 1434 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4606 GetRequests, 3445 SyntacticMatches, 362 SemanticMatches, 799 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5725 ImplicationChecksByTransitivity, 30.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 41 MinimizatonAttempts, 39 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 32.4s InterpolantComputationTime, 4338 NumberOfCodeBlocks, 4338 NumberOfCodeBlocksAsserted, 205 NumberOfCheckSat, 6219 ConstructedInterpolants, 850 QuantifiedInterpolants, 3750180 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3913 ConjunctsInSsa, 435 ConjunctsInUnsatCore, 115 InterpolantComputations, 4 PerfectInterpolantSequences, 0/34827 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...