./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a_true-termination_true-no-overflow.c.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_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a_true-termination_true-no-overflow.c.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 0455ba49274114922cfe1b7739d9cb0a89e6c868 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 13:28:57,801 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 13:28:57,802 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 13:28:57,808 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 13:28:57,808 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 13:28:57,808 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 13:28:57,809 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 13:28:57,810 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 13:28:57,811 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 13:28:57,811 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 13:28:57,811 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 13:28:57,812 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 13:28:57,812 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 13:28:57,812 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 13:28:57,813 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 13:28:57,813 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 13:28:57,814 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 13:28:57,815 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 13:28:57,816 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 13:28:57,816 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 13:28:57,817 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 13:28:57,817 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 13:28:57,819 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 13:28:57,819 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 13:28:57,819 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 13:28:57,819 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 13:28:57,820 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 13:28:57,820 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 13:28:57,821 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 13:28:57,821 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 13:28:57,821 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 13:28:57,822 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 13:28:57,822 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 13:28:57,822 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 13:28:57,822 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 13:28:57,823 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 13:28:57,823 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-12-09 13:28:57,830 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 13:28:57,830 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 13:28:57,831 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 13:28:57,831 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 13:28:57,831 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 13:28:57,831 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 13:28:57,831 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 13:28:57,831 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 13:28:57,831 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 13:28:57,831 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 13:28:57,831 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 13:28:57,831 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 13:28:57,832 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 13:28:57,832 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 13:28:57,832 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 13:28:57,832 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 13:28:57,832 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 13:28:57,832 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 13:28:57,832 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 13:28:57,832 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 13:28:57,833 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 13:28:57,833 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 13:28:57,833 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 13:28:57,834 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 13:28:57,834 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 13:28:57,834 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 13:28:57,834 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 13:28:57,834 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_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 -> 0455ba49274114922cfe1b7739d9cb0a89e6c868 [2018-12-09 13:28:57,851 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 13:28:57,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 13:28:57,859 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 13:28:57,860 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 13:28:57,860 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 13:28:57,860 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a_true-termination_true-no-overflow.c.c [2018-12-09 13:28:57,897 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/data/bf5e85cd5/d95a22b340234805a916fcf93490f453/FLAG35676a6f4 [2018-12-09 13:28:58,312 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 13:28:58,312 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a_true-termination_true-no-overflow.c.c [2018-12-09 13:28:58,316 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/data/bf5e85cd5/d95a22b340234805a916fcf93490f453/FLAG35676a6f4 [2018-12-09 13:28:58,324 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/data/bf5e85cd5/d95a22b340234805a916fcf93490f453 [2018-12-09 13:28:58,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 13:28:58,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 13:28:58,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 13:28:58,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 13:28:58,329 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 13:28:58,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e0d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58, skipping insertion in model container [2018-12-09 13:28:58,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 13:28:58,344 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 13:28:58,423 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 13:28:58,426 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 13:28:58,434 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 13:28:58,441 INFO L195 MainTranslator]: Completed translation [2018-12-09 13:28:58,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58 WrapperNode [2018-12-09 13:28:58,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 13:28:58,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 13:28:58,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 13:28:58,442 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 13:28:58,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 13:28:58,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 13:28:58,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 13:28:58,453 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 13:28:58,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... [2018-12-09 13:28:58,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 13:28:58,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 13:28:58,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 13:28:58,464 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 13:28:58,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 13:28:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 13:28:58,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 13:28:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 13:28:58,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 13:28:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 13:28:58,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 13:28:58,607 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 13:28:58,607 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 13:28:58,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:28:58 BoogieIcfgContainer [2018-12-09 13:28:58,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 13:28:58,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 13:28:58,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 13:28:58,611 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 13:28:58,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:28:58" (1/3) ... [2018-12-09 13:28:58,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ed1ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:28:58, skipping insertion in model container [2018-12-09 13:28:58,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:28:58" (2/3) ... [2018-12-09 13:28:58,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ed1ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:28:58, skipping insertion in model container [2018-12-09 13:28:58,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:28:58" (3/3) ... [2018-12-09 13:28:58,613 INFO L112 eAbstractionObserver]: Analyzing ICFG GopanReps-CAV2006-Fig1a_true-termination_true-no-overflow.c.c [2018-12-09 13:28:58,621 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 13:28:58,625 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-12-09 13:28:58,634 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-12-09 13:28:58,652 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 13:28:58,652 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 13:28:58,652 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 13:28:58,652 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 13:28:58,652 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 13:28:58,652 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 13:28:58,652 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 13:28:58,652 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 13:28:58,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-09 13:28:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-09 13:28:58,665 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:58,666 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:58,667 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:58,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:58,670 INFO L82 PathProgramCache]: Analyzing trace with hash -623924281, now seen corresponding path program 1 times [2018-12-09 13:28:58,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:58,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:58,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,705 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:58,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 13:28:58,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 13:28:58,747 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:28:58,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 13:28:58,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 13:28:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 13:28:58,765 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2018-12-09 13:28:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:58,809 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2018-12-09 13:28:58,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 13:28:58,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-12-09 13:28:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:58,815 INFO L225 Difference]: With dead ends: 41 [2018-12-09 13:28:58,815 INFO L226 Difference]: Without dead ends: 29 [2018-12-09 13:28:58,817 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 [2018-12-09 13:28:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-09 13:28:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-12-09 13:28:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 13:28:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2018-12-09 13:28:58,838 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 8 [2018-12-09 13:28:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:58,838 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2018-12-09 13:28:58,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 13:28:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2018-12-09 13:28:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 13:28:58,838 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:58,838 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:58,839 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:58,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2133183819, now seen corresponding path program 1 times [2018-12-09 13:28:58,839 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:58,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:58,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,840 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:58,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 13:28:58,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 13:28:58,858 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:28:58,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 13:28:58,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 13:28:58,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 13:28:58,859 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2018-12-09 13:28:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:58,871 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2018-12-09 13:28:58,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 13:28:58,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-12-09 13:28:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:58,872 INFO L225 Difference]: With dead ends: 32 [2018-12-09 13:28:58,872 INFO L226 Difference]: Without dead ends: 30 [2018-12-09 13:28:58,872 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 [2018-12-09 13:28:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-09 13:28:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2018-12-09 13:28:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 13:28:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-09 13:28:58,875 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2018-12-09 13:28:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:58,875 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-09 13:28:58,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 13:28:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-09 13:28:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 13:28:58,875 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:58,875 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:58,876 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:58,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1704189008, now seen corresponding path program 1 times [2018-12-09 13:28:58,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:58,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:58,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,877 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:58,888 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 13:28:58,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 13:28:58,888 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:28:58,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 13:28:58,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 13:28:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 13:28:58,889 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2018-12-09 13:28:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:58,904 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2018-12-09 13:28:58,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 13:28:58,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 13:28:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:58,904 INFO L225 Difference]: With dead ends: 42 [2018-12-09 13:28:58,904 INFO L226 Difference]: Without dead ends: 23 [2018-12-09 13:28:58,905 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 [2018-12-09 13:28:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-09 13:28:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-12-09 13:28:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-09 13:28:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-12-09 13:28:58,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2018-12-09 13:28:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:58,907 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-12-09 13:28:58,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 13:28:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-12-09 13:28:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-09 13:28:58,908 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:58,908 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:58,908 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:58,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1290251757, now seen corresponding path program 1 times [2018-12-09 13:28:58,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:58,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:58,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,909 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:58,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 13:28:58,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 13:28:58,919 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:28:58,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 13:28:58,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 13:28:58,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 13:28:58,920 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2018-12-09 13:28:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:58,926 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2018-12-09 13:28:58,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 13:28:58,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-12-09 13:28:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:58,927 INFO L225 Difference]: With dead ends: 22 [2018-12-09 13:28:58,927 INFO L226 Difference]: Without dead ends: 21 [2018-12-09 13:28:58,927 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 [2018-12-09 13:28:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-09 13:28:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-09 13:28:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 13:28:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-09 13:28:58,929 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2018-12-09 13:28:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:58,929 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-09 13:28:58,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 13:28:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-09 13:28:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 13:28:58,930 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:58,930 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:58,930 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:58,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:58,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2067163616, now seen corresponding path program 1 times [2018-12-09 13:28:58,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:58,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:58,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:58,932 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:58,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:58,948 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:28:58,949 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-12-09 13:28:58,950 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [16], [17], [18], [20], [29], [31], [37], [38], [39] [2018-12-09 13:28:58,973 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 13:28:58,973 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 13:28:59,062 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 13:28:59,063 INFO L272 AbstractInterpreter]: Visited 12 different actions 33 times. Merged at 7 different actions 19 times. Never widened. Performed 108 root evaluator evaluations with a maximum evaluation depth of 2. Performed 108 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-12-09 13:28:59,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,071 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 13:28:59,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,071 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:28:59,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:59,078 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:28:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:28:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,098 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:28:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:28:59,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-09 13:28:59,136 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:28:59,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 13:28:59,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 13:28:59,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 13:28:59,136 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2018-12-09 13:28:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:59,162 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2018-12-09 13:28:59,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 13:28:59,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-09 13:28:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:59,163 INFO L225 Difference]: With dead ends: 41 [2018-12-09 13:28:59,163 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 13:28:59,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 13:28:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 13:28:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-12-09 13:28:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-09 13:28:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2018-12-09 13:28:59,168 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2018-12-09 13:28:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:59,168 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2018-12-09 13:28:59,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 13:28:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2018-12-09 13:28:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 13:28:59,169 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:59,169 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:59,169 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:59,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2025624681, now seen corresponding path program 1 times [2018-12-09 13:28:59,169 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:59,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:59,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,171 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 13:28:59,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 13:28:59,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 13:28:59,184 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:28:59,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 13:28:59,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 13:28:59,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 13:28:59,185 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 3 states. [2018-12-09 13:28:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:59,197 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2018-12-09 13:28:59,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 13:28:59,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-12-09 13:28:59,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:59,198 INFO L225 Difference]: With dead ends: 37 [2018-12-09 13:28:59,198 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 13:28:59,198 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 [2018-12-09 13:28:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 13:28:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2018-12-09 13:28:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 13:28:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-12-09 13:28:59,202 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2018-12-09 13:28:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:59,202 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-12-09 13:28:59,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 13:28:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-12-09 13:28:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-09 13:28:59,203 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:59,203 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:59,203 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:59,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2025809379, now seen corresponding path program 1 times [2018-12-09 13:28:59,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,205 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,224 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:28:59,224 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-12-09 13:28:59,224 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [16], [18], [20], [22], [24], [26], [28], [29], [31], [37], [38], [39] [2018-12-09 13:28:59,225 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 13:28:59,225 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 13:28:59,260 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 13:28:59,260 INFO L272 AbstractInterpreter]: Visited 15 different actions 51 times. Merged at 9 different actions 29 times. Never widened. Performed 180 root evaluator evaluations with a maximum evaluation depth of 2. Performed 180 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 5 fixpoints after 3 different actions. Largest state had 2 variables. [2018-12-09 13:28:59,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,262 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 13:28:59,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,262 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:28:59,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:59,268 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:28:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:28:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:28:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:28:59,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2018-12-09 13:28:59,313 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:28:59,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 13:28:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 13:28:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 13:28:59,314 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2018-12-09 13:28:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:59,337 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2018-12-09 13:28:59,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 13:28:59,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-12-09 13:28:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:59,338 INFO L225 Difference]: With dead ends: 64 [2018-12-09 13:28:59,338 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 13:28:59,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 13:28:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 13:28:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-09 13:28:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 13:28:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-12-09 13:28:59,341 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 16 [2018-12-09 13:28:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:59,341 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-12-09 13:28:59,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 13:28:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-12-09 13:28:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-09 13:28:59,342 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:59,342 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:59,342 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:59,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash -432629319, now seen corresponding path program 2 times [2018-12-09 13:28:59,342 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:59,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:59,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,343 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,360 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:28:59,360 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:28:59,361 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:28:59,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,361 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:28:59,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:28:59,367 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:28:59,372 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 13:28:59,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:28:59,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:28:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:28:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:28:59,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-09 13:28:59,412 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:28:59,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 13:28:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 13:28:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 13:28:59,413 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2018-12-09 13:28:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:59,427 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-12-09 13:28:59,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 13:28:59,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-09 13:28:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:59,428 INFO L225 Difference]: With dead ends: 40 [2018-12-09 13:28:59,428 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 13:28:59,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 13:28:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 13:28:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-12-09 13:28:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-09 13:28:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2018-12-09 13:28:59,431 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 20 [2018-12-09 13:28:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:59,431 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2018-12-09 13:28:59,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 13:28:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2018-12-09 13:28:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-09 13:28:59,431 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:59,431 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:59,432 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:59,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,432 INFO L82 PathProgramCache]: Analyzing trace with hash 305055378, now seen corresponding path program 3 times [2018-12-09 13:28:59,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:59,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:28:59,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,433 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,467 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:28:59,467 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:28:59,467 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:28:59,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,468 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:28:59,475 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:28:59,475 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:28:59,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:28:59,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:28:59,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:28:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:28:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:28:59,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-09 13:28:59,542 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:28:59,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 13:28:59,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 13:28:59,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-09 13:28:59,542 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 6 states. [2018-12-09 13:28:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:59,572 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2018-12-09 13:28:59,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 13:28:59,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-12-09 13:28:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:59,573 INFO L225 Difference]: With dead ends: 88 [2018-12-09 13:28:59,573 INFO L226 Difference]: Without dead ends: 86 [2018-12-09 13:28:59,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-09 13:28:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-09 13:28:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2018-12-09 13:28:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-09 13:28:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2018-12-09 13:28:59,578 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 26 [2018-12-09 13:28:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:59,578 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2018-12-09 13:28:59,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 13:28:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2018-12-09 13:28:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-09 13:28:59,578 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:59,579 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:59,579 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:59,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,579 INFO L82 PathProgramCache]: Analyzing trace with hash -847369045, now seen corresponding path program 4 times [2018-12-09 13:28:59,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:59,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:28:59,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,580 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,614 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:28:59,615 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:28:59,615 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:28:59,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,615 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:28:59,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:59,621 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:28:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:28:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,632 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:28:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:28:59,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-09 13:28:59,700 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:28:59,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 13:28:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 13:28:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 13:28:59,700 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 7 states. [2018-12-09 13:28:59,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:59,738 INFO L93 Difference]: Finished difference Result 148 states and 178 transitions. [2018-12-09 13:28:59,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 13:28:59,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2018-12-09 13:28:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:59,740 INFO L225 Difference]: With dead ends: 148 [2018-12-09 13:28:59,740 INFO L226 Difference]: Without dead ends: 146 [2018-12-09 13:28:59,740 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 13:28:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-12-09 13:28:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 95. [2018-12-09 13:28:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-12-09 13:28:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2018-12-09 13:28:59,748 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 32 [2018-12-09 13:28:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:59,748 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2018-12-09 13:28:59,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 13:28:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2018-12-09 13:28:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 13:28:59,749 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:59,749 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:59,750 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:59,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 155374504, now seen corresponding path program 2 times [2018-12-09 13:28:59,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:59,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:28:59,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,751 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 13:28:59,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,789 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:28:59,789 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:28:59,789 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:28:59,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,789 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:28:59,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:28:59,796 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:28:59,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-09 13:28:59,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:28:59,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:28:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 13:28:59,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:28:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 13:28:59,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:28:59,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2018-12-09 13:28:59,868 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:28:59,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 13:28:59,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 13:28:59,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 13:28:59,869 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 9 states. [2018-12-09 13:28:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:28:59,907 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2018-12-09 13:28:59,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 13:28:59,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2018-12-09 13:28:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:28:59,908 INFO L225 Difference]: With dead ends: 135 [2018-12-09 13:28:59,908 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 13:28:59,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 13:28:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 13:28:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2018-12-09 13:28:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 13:28:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-12-09 13:28:59,913 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 34 [2018-12-09 13:28:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:28:59,914 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-12-09 13:28:59,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 13:28:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-12-09 13:28:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-09 13:28:59,914 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:28:59,915 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-12-09 13:28:59,915 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:28:59,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:28:59,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2007292932, now seen corresponding path program 5 times [2018-12-09 13:28:59,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:28:59,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:28:59,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:28:59,917 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:28:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:28:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:28:59,954 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:28:59,955 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:28:59,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:28:59,955 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:28:59,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:28:59,961 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:28:59,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 13:28:59,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:28:59,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:28:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:28:59,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:00,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-09 13:29:00,045 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:00,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 13:29:00,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 13:29:00,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 13:29:00,045 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 8 states. [2018-12-09 13:29:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:00,103 INFO L93 Difference]: Finished difference Result 160 states and 197 transitions. [2018-12-09 13:29:00,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 13:29:00,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2018-12-09 13:29:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:00,103 INFO L225 Difference]: With dead ends: 160 [2018-12-09 13:29:00,103 INFO L226 Difference]: Without dead ends: 158 [2018-12-09 13:29:00,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 13:29:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-09 13:29:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2018-12-09 13:29:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-09 13:29:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 171 transitions. [2018-12-09 13:29:00,108 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 171 transitions. Word has length 38 [2018-12-09 13:29:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:00,108 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 171 transitions. [2018-12-09 13:29:00,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 13:29:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 171 transitions. [2018-12-09 13:29:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 13:29:00,109 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:00,109 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:00,109 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:00,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:00,109 INFO L82 PathProgramCache]: Analyzing trace with hash 869721245, now seen corresponding path program 6 times [2018-12-09 13:29:00,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:00,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:00,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,110 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,150 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:00,150 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:00,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:00,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,150 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:00,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:00,156 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:00,162 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:00,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:00,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:00,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-12-09 13:29:00,242 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:00,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 13:29:00,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 13:29:00,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-09 13:29:00,242 INFO L87 Difference]: Start difference. First operand 149 states and 171 transitions. Second operand 9 states. [2018-12-09 13:29:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:00,287 INFO L93 Difference]: Finished difference Result 279 states and 340 transitions. [2018-12-09 13:29:00,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 13:29:00,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-12-09 13:29:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:00,288 INFO L225 Difference]: With dead ends: 279 [2018-12-09 13:29:00,288 INFO L226 Difference]: Without dead ends: 277 [2018-12-09 13:29:00,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-12-09 13:29:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-12-09 13:29:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 170. [2018-12-09 13:29:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-12-09 13:29:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 196 transitions. [2018-12-09 13:29:00,294 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 196 transitions. Word has length 44 [2018-12-09 13:29:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:00,294 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 196 transitions. [2018-12-09 13:29:00,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 13:29:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 196 transitions. [2018-12-09 13:29:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-09 13:29:00,294 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:00,294 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:00,295 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:00,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1375491702, now seen corresponding path program 7 times [2018-12-09 13:29:00,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:00,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:00,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,296 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,331 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:00,331 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:00,331 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:00,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,331 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:00,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:00,338 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:00,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:00,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-09 13:29:00,436 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:00,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 13:29:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 13:29:00,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-09 13:29:00,437 INFO L87 Difference]: Start difference. First operand 170 states and 196 transitions. Second operand 10 states. [2018-12-09 13:29:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:00,483 INFO L93 Difference]: Finished difference Result 322 states and 394 transitions. [2018-12-09 13:29:00,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 13:29:00,483 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2018-12-09 13:29:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:00,485 INFO L225 Difference]: With dead ends: 322 [2018-12-09 13:29:00,485 INFO L226 Difference]: Without dead ends: 320 [2018-12-09 13:29:00,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-09 13:29:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2018-12-09 13:29:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 191. [2018-12-09 13:29:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-12-09 13:29:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 221 transitions. [2018-12-09 13:29:00,491 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 221 transitions. Word has length 50 [2018-12-09 13:29:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:00,491 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 221 transitions. [2018-12-09 13:29:00,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 13:29:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 221 transitions. [2018-12-09 13:29:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-09 13:29:00,493 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:00,493 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:00,493 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:00,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash 379593005, now seen corresponding path program 3 times [2018-12-09 13:29:00,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:00,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:00,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,495 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 13:29:00,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,533 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:00,533 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:00,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:00,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,533 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:00,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:00,540 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:00,546 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:00,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:00,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 13:29:00,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 13:29:00,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:00,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2018-12-09 13:29:00,616 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:00,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 13:29:00,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 13:29:00,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 13:29:00,617 INFO L87 Difference]: Start difference. First operand 191 states and 221 transitions. Second operand 8 states. [2018-12-09 13:29:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:00,636 INFO L93 Difference]: Finished difference Result 361 states and 422 transitions. [2018-12-09 13:29:00,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 13:29:00,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2018-12-09 13:29:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:00,637 INFO L225 Difference]: With dead ends: 361 [2018-12-09 13:29:00,637 INFO L226 Difference]: Without dead ends: 201 [2018-12-09 13:29:00,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 13:29:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-12-09 13:29:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2018-12-09 13:29:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-12-09 13:29:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 227 transitions. [2018-12-09 13:29:00,641 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 227 transitions. Word has length 52 [2018-12-09 13:29:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:00,642 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 227 transitions. [2018-12-09 13:29:00,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 13:29:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 227 transitions. [2018-12-09 13:29:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 13:29:00,642 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:00,642 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:00,643 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:00,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash -139378289, now seen corresponding path program 8 times [2018-12-09 13:29:00,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:00,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:00,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,644 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,693 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:00,693 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:00,693 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:00,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,693 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:00,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:00,699 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:00,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-09 13:29:00,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:00,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:00,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:00,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-12-09 13:29:00,822 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:00,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 13:29:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 13:29:00,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-09 13:29:00,823 INFO L87 Difference]: Start difference. First operand 197 states and 227 transitions. Second operand 11 states. [2018-12-09 13:29:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:00,883 INFO L93 Difference]: Finished difference Result 371 states and 454 transitions. [2018-12-09 13:29:00,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 13:29:00,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2018-12-09 13:29:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:00,884 INFO L225 Difference]: With dead ends: 371 [2018-12-09 13:29:00,885 INFO L226 Difference]: Without dead ends: 369 [2018-12-09 13:29:00,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-09 13:29:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2018-12-09 13:29:00,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 218. [2018-12-09 13:29:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-12-09 13:29:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 252 transitions. [2018-12-09 13:29:00,890 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 252 transitions. Word has length 56 [2018-12-09 13:29:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:00,890 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 252 transitions. [2018-12-09 13:29:00,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 13:29:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 252 transitions. [2018-12-09 13:29:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-09 13:29:00,891 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:00,891 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:00,891 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:00,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:00,891 INFO L82 PathProgramCache]: Analyzing trace with hash 583444998, now seen corresponding path program 4 times [2018-12-09 13:29:00,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:00,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:00,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:00,892 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 91 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-12-09 13:29:00,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,918 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:00,918 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:00,918 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:00,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:00,918 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:00,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:00,926 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:00,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 58 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 13:29:00,974 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 58 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 13:29:01,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:01,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2018-12-09 13:29:01,032 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:01,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 13:29:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 13:29:01,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-09 13:29:01,033 INFO L87 Difference]: Start difference. First operand 218 states and 252 transitions. Second operand 15 states. [2018-12-09 13:29:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:01,075 INFO L93 Difference]: Finished difference Result 519 states and 620 transitions. [2018-12-09 13:29:01,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 13:29:01,075 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2018-12-09 13:29:01,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:01,077 INFO L225 Difference]: With dead ends: 519 [2018-12-09 13:29:01,077 INFO L226 Difference]: Without dead ends: 338 [2018-12-09 13:29:01,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-09 13:29:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-12-09 13:29:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 329. [2018-12-09 13:29:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-12-09 13:29:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 381 transitions. [2018-12-09 13:29:01,087 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 381 transitions. Word has length 58 [2018-12-09 13:29:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:01,087 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 381 transitions. [2018-12-09 13:29:01,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 13:29:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 381 transitions. [2018-12-09 13:29:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-09 13:29:01,088 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:01,088 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:01,089 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:01,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash 155563496, now seen corresponding path program 9 times [2018-12-09 13:29:01,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:01,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:01,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:01,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:01,090 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:01,154 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:01,154 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:01,155 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:01,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:01,155 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:01,160 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:01,160 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:01,168 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:01,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:01,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:01,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2018-12-09 13:29:01,295 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:01,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 13:29:01,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 13:29:01,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-09 13:29:01,295 INFO L87 Difference]: Start difference. First operand 329 states and 381 transitions. Second operand 12 states. [2018-12-09 13:29:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:01,350 INFO L93 Difference]: Finished difference Result 633 states and 781 transitions. [2018-12-09 13:29:01,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 13:29:01,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2018-12-09 13:29:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:01,351 INFO L225 Difference]: With dead ends: 633 [2018-12-09 13:29:01,351 INFO L226 Difference]: Without dead ends: 631 [2018-12-09 13:29:01,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-09 13:29:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2018-12-09 13:29:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 368. [2018-12-09 13:29:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-12-09 13:29:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 427 transitions. [2018-12-09 13:29:01,361 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 427 transitions. Word has length 62 [2018-12-09 13:29:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:01,361 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 427 transitions. [2018-12-09 13:29:01,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 13:29:01,361 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 427 transitions. [2018-12-09 13:29:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-09 13:29:01,361 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:01,361 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:01,361 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:01,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1388168065, now seen corresponding path program 10 times [2018-12-09 13:29:01,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:01,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:01,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:01,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:01,362 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:01,445 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:01,445 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:01,446 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:01,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:01,446 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:01,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:01,454 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:01,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,469 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:01,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-12-09 13:29:01,602 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:01,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 13:29:01,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 13:29:01,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-09 13:29:01,602 INFO L87 Difference]: Start difference. First operand 368 states and 427 transitions. Second operand 13 states. [2018-12-09 13:29:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:01,665 INFO L93 Difference]: Finished difference Result 712 states and 880 transitions. [2018-12-09 13:29:01,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 13:29:01,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2018-12-09 13:29:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:01,668 INFO L225 Difference]: With dead ends: 712 [2018-12-09 13:29:01,668 INFO L226 Difference]: Without dead ends: 710 [2018-12-09 13:29:01,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-09 13:29:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2018-12-09 13:29:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 407. [2018-12-09 13:29:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-12-09 13:29:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 473 transitions. [2018-12-09 13:29:01,684 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 473 transitions. Word has length 68 [2018-12-09 13:29:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:01,685 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 473 transitions. [2018-12-09 13:29:01,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 13:29:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 473 transitions. [2018-12-09 13:29:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-12-09 13:29:01,686 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:01,686 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:01,686 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:01,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash -254707110, now seen corresponding path program 11 times [2018-12-09 13:29:01,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:01,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:01,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:01,770 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:01,770 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:01,770 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:01,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:01,770 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:01,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:01,776 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:01,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-09 13:29:01,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:01,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:01,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:01,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2018-12-09 13:29:01,953 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:01,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 13:29:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 13:29:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-09 13:29:01,953 INFO L87 Difference]: Start difference. First operand 407 states and 473 transitions. Second operand 14 states. [2018-12-09 13:29:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:02,017 INFO L93 Difference]: Finished difference Result 791 states and 979 transitions. [2018-12-09 13:29:02,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 13:29:02,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-12-09 13:29:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:02,019 INFO L225 Difference]: With dead ends: 791 [2018-12-09 13:29:02,019 INFO L226 Difference]: Without dead ends: 789 [2018-12-09 13:29:02,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-09 13:29:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2018-12-09 13:29:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 446. [2018-12-09 13:29:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2018-12-09 13:29:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 519 transitions. [2018-12-09 13:29:02,028 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 519 transitions. Word has length 74 [2018-12-09 13:29:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:02,029 INFO L480 AbstractCegarLoop]: Abstraction has 446 states and 519 transitions. [2018-12-09 13:29:02,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 13:29:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 519 transitions. [2018-12-09 13:29:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-09 13:29:02,030 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:02,030 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:02,030 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:02,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash -101913997, now seen corresponding path program 12 times [2018-12-09 13:29:02,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:02,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:02,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:02,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:02,031 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:02,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:02,111 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:02,112 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:02,112 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:02,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:02,112 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:02,120 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:02,120 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:02,128 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:02,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:02,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:02,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:02,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:02,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-12-09 13:29:02,285 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:02,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 13:29:02,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 13:29:02,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-09 13:29:02,286 INFO L87 Difference]: Start difference. First operand 446 states and 519 transitions. Second operand 15 states. [2018-12-09 13:29:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:02,386 INFO L93 Difference]: Finished difference Result 870 states and 1078 transitions. [2018-12-09 13:29:02,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 13:29:02,387 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2018-12-09 13:29:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:02,389 INFO L225 Difference]: With dead ends: 870 [2018-12-09 13:29:02,389 INFO L226 Difference]: Without dead ends: 868 [2018-12-09 13:29:02,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-12-09 13:29:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2018-12-09 13:29:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 485. [2018-12-09 13:29:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2018-12-09 13:29:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 565 transitions. [2018-12-09 13:29:02,404 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 565 transitions. Word has length 80 [2018-12-09 13:29:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:02,404 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 565 transitions. [2018-12-09 13:29:02,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 13:29:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 565 transitions. [2018-12-09 13:29:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-12-09 13:29:02,405 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:02,405 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:02,405 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:02,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1731208140, now seen corresponding path program 13 times [2018-12-09 13:29:02,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:02,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:02,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:02,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:02,406 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:02,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:02,489 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:02,489 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:02,489 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:02,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:02,489 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:02,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:02,497 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:02,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:02,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:02,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:02,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2018-12-09 13:29:02,711 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:02,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 13:29:02,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 13:29:02,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-09 13:29:02,712 INFO L87 Difference]: Start difference. First operand 485 states and 565 transitions. Second operand 16 states. [2018-12-09 13:29:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:02,792 INFO L93 Difference]: Finished difference Result 949 states and 1177 transitions. [2018-12-09 13:29:02,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 13:29:02,793 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2018-12-09 13:29:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:02,795 INFO L225 Difference]: With dead ends: 949 [2018-12-09 13:29:02,795 INFO L226 Difference]: Without dead ends: 947 [2018-12-09 13:29:02,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-09 13:29:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2018-12-09 13:29:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 524. [2018-12-09 13:29:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-12-09 13:29:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 611 transitions. [2018-12-09 13:29:02,812 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 611 transitions. Word has length 86 [2018-12-09 13:29:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:02,812 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 611 transitions. [2018-12-09 13:29:02,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 13:29:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 611 transitions. [2018-12-09 13:29:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-09 13:29:02,813 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:02,813 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 8, 8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:02,813 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:02,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:02,813 INFO L82 PathProgramCache]: Analyzing trace with hash 694950769, now seen corresponding path program 5 times [2018-12-09 13:29:02,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:02,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:02,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:02,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:02,815 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 178 proven. 184 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-12-09 13:29:02,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:02,875 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:02,875 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:02,875 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:02,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:02,875 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:02,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:02,885 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:02,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-09 13:29:02,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:02,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 201 proven. 96 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-12-09 13:29:02,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 201 proven. 96 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-12-09 13:29:03,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:03,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2018-12-09 13:29:03,053 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:03,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 13:29:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 13:29:03,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-12-09 13:29:03,053 INFO L87 Difference]: Start difference. First operand 524 states and 611 transitions. Second operand 18 states. [2018-12-09 13:29:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:03,095 INFO L93 Difference]: Finished difference Result 1076 states and 1264 transitions. [2018-12-09 13:29:03,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 13:29:03,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2018-12-09 13:29:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:03,097 INFO L225 Difference]: With dead ends: 1076 [2018-12-09 13:29:03,097 INFO L226 Difference]: Without dead ends: 601 [2018-12-09 13:29:03,098 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-12-09 13:29:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2018-12-09 13:29:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 587. [2018-12-09 13:29:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2018-12-09 13:29:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 683 transitions. [2018-12-09 13:29:03,107 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 683 transitions. Word has length 88 [2018-12-09 13:29:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:03,107 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 683 transitions. [2018-12-09 13:29:03,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 13:29:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 683 transitions. [2018-12-09 13:29:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-12-09 13:29:03,108 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:03,108 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:03,108 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:03,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1030698597, now seen corresponding path program 14 times [2018-12-09 13:29:03,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:03,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:03,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:03,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:03,109 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:03,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:03,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:03,207 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:03,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:03,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:03,207 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:03,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:03,213 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:03,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-12-09 13:29:03,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:03,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:03,237 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:03,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:03,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2018-12-09 13:29:03,460 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:03,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 13:29:03,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 13:29:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-09 13:29:03,460 INFO L87 Difference]: Start difference. First operand 587 states and 683 transitions. Second operand 17 states. [2018-12-09 13:29:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:03,559 INFO L93 Difference]: Finished difference Result 1145 states and 1420 transitions. [2018-12-09 13:29:03,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-09 13:29:03,559 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2018-12-09 13:29:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:03,561 INFO L225 Difference]: With dead ends: 1145 [2018-12-09 13:29:03,561 INFO L226 Difference]: Without dead ends: 1143 [2018-12-09 13:29:03,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-09 13:29:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2018-12-09 13:29:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 632. [2018-12-09 13:29:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2018-12-09 13:29:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 736 transitions. [2018-12-09 13:29:03,571 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 736 transitions. Word has length 92 [2018-12-09 13:29:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:03,572 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 736 transitions. [2018-12-09 13:29:03,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 13:29:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 736 transitions. [2018-12-09 13:29:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-12-09 13:29:03,572 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:03,572 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:03,572 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:03,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash -164482498, now seen corresponding path program 15 times [2018-12-09 13:29:03,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:03,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:03,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:03,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:03,574 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:03,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:03,670 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:03,670 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:03,670 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:03,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:03,670 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:03,678 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:03,678 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:03,689 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:03,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:03,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:03,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:03,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:03,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2018-12-09 13:29:03,932 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:03,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 13:29:03,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 13:29:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-09 13:29:03,933 INFO L87 Difference]: Start difference. First operand 632 states and 736 transitions. Second operand 18 states. [2018-12-09 13:29:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:04,034 INFO L93 Difference]: Finished difference Result 1236 states and 1534 transitions. [2018-12-09 13:29:04,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 13:29:04,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 98 [2018-12-09 13:29:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:04,035 INFO L225 Difference]: With dead ends: 1236 [2018-12-09 13:29:04,035 INFO L226 Difference]: Without dead ends: 1234 [2018-12-09 13:29:04,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-09 13:29:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2018-12-09 13:29:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 677. [2018-12-09 13:29:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2018-12-09 13:29:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 789 transitions. [2018-12-09 13:29:04,046 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 789 transitions. Word has length 98 [2018-12-09 13:29:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:04,046 INFO L480 AbstractCegarLoop]: Abstraction has 677 states and 789 transitions. [2018-12-09 13:29:04,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 13:29:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 789 transitions. [2018-12-09 13:29:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-12-09 13:29:04,047 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:04,047 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:04,047 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:04,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash 682960727, now seen corresponding path program 16 times [2018-12-09 13:29:04,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:04,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:04,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:04,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:04,048 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:04,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:04,158 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:04,158 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:04,158 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:04,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:04,158 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:04,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:04,166 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:04,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:04,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:04,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:04,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2018-12-09 13:29:04,428 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:04,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-09 13:29:04,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-09 13:29:04,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-09 13:29:04,429 INFO L87 Difference]: Start difference. First operand 677 states and 789 transitions. Second operand 19 states. [2018-12-09 13:29:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:04,532 INFO L93 Difference]: Finished difference Result 1327 states and 1648 transitions. [2018-12-09 13:29:04,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-09 13:29:04,533 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2018-12-09 13:29:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:04,534 INFO L225 Difference]: With dead ends: 1327 [2018-12-09 13:29:04,534 INFO L226 Difference]: Without dead ends: 1325 [2018-12-09 13:29:04,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-09 13:29:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2018-12-09 13:29:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 722. [2018-12-09 13:29:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2018-12-09 13:29:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 842 transitions. [2018-12-09 13:29:04,553 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 842 transitions. Word has length 104 [2018-12-09 13:29:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:04,554 INFO L480 AbstractCegarLoop]: Abstraction has 722 states and 842 transitions. [2018-12-09 13:29:04,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-09 13:29:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 842 transitions. [2018-12-09 13:29:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-12-09 13:29:04,555 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:04,555 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 10, 10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:04,555 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:04,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:04,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1503165258, now seen corresponding path program 6 times [2018-12-09 13:29:04,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:04,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:04,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:04,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:04,556 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 262 proven. 290 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-12-09 13:29:04,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:04,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:04,626 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:04,626 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:04,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:04,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:04,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:04,635 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:04,645 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:04,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:04,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 262 proven. 290 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-12-09 13:29:04,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 262 proven. 290 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-12-09 13:29:04,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:04,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2018-12-09 13:29:04,772 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:04,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 13:29:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 13:29:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-09 13:29:04,773 INFO L87 Difference]: Start difference. First operand 722 states and 842 transitions. Second operand 13 states. [2018-12-09 13:29:04,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:04,805 INFO L93 Difference]: Finished difference Result 1393 states and 1634 transitions. [2018-12-09 13:29:04,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 13:29:04,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 106 [2018-12-09 13:29:04,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:04,807 INFO L225 Difference]: With dead ends: 1393 [2018-12-09 13:29:04,807 INFO L226 Difference]: Without dead ends: 732 [2018-12-09 13:29:04,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-09 13:29:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2018-12-09 13:29:04,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 728. [2018-12-09 13:29:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 728 states. [2018-12-09 13:29:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 848 transitions. [2018-12-09 13:29:04,817 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 848 transitions. Word has length 106 [2018-12-09 13:29:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:04,817 INFO L480 AbstractCegarLoop]: Abstraction has 728 states and 848 transitions. [2018-12-09 13:29:04,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 13:29:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 848 transitions. [2018-12-09 13:29:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-12-09 13:29:04,818 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:04,818 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:04,818 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:04,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1927816624, now seen corresponding path program 17 times [2018-12-09 13:29:04,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:04,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:04,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:04,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:04,819 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:04,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:04,927 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:04,927 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:04,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:04,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:04,927 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:04,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:04,937 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:04,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-09 13:29:04,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:04,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:04,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:05,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:05,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2018-12-09 13:29:05,255 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:05,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-09 13:29:05,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-09 13:29:05,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-09 13:29:05,256 INFO L87 Difference]: Start difference. First operand 728 states and 848 transitions. Second operand 20 states. [2018-12-09 13:29:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:05,358 INFO L93 Difference]: Finished difference Result 1424 states and 1768 transitions. [2018-12-09 13:29:05,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-09 13:29:05,358 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2018-12-09 13:29:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:05,360 INFO L225 Difference]: With dead ends: 1424 [2018-12-09 13:29:05,360 INFO L226 Difference]: Without dead ends: 1422 [2018-12-09 13:29:05,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-09 13:29:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2018-12-09 13:29:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 773. [2018-12-09 13:29:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2018-12-09 13:29:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 901 transitions. [2018-12-09 13:29:05,371 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 901 transitions. Word has length 110 [2018-12-09 13:29:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:05,371 INFO L480 AbstractCegarLoop]: Abstraction has 773 states and 901 transitions. [2018-12-09 13:29:05,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-09 13:29:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 901 transitions. [2018-12-09 13:29:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-12-09 13:29:05,372 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:05,372 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 11, 11, 11, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:05,372 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:05,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash 802443471, now seen corresponding path program 7 times [2018-12-09 13:29:05,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:05,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:05,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:05,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:05,373 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 287 proven. 352 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-12-09 13:29:05,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:05,439 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:05,439 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:05,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:05,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:05,440 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:05,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:05,450 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:05,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 287 proven. 352 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-12-09 13:29:05,470 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 287 proven. 352 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-12-09 13:29:05,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:05,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2018-12-09 13:29:05,606 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:05,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 13:29:05,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 13:29:05,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-09 13:29:05,606 INFO L87 Difference]: Start difference. First operand 773 states and 901 transitions. Second operand 14 states. [2018-12-09 13:29:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:05,638 INFO L93 Difference]: Finished difference Result 1489 states and 1746 transitions. [2018-12-09 13:29:05,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 13:29:05,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 112 [2018-12-09 13:29:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:05,639 INFO L225 Difference]: With dead ends: 1489 [2018-12-09 13:29:05,639 INFO L226 Difference]: Without dead ends: 783 [2018-12-09 13:29:05,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-09 13:29:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-12-09 13:29:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 779. [2018-12-09 13:29:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2018-12-09 13:29:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 907 transitions. [2018-12-09 13:29:05,648 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 907 transitions. Word has length 112 [2018-12-09 13:29:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:05,648 INFO L480 AbstractCegarLoop]: Abstraction has 779 states and 907 transitions. [2018-12-09 13:29:05,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 13:29:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 907 transitions. [2018-12-09 13:29:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-12-09 13:29:05,649 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:05,649 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:05,649 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:05,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1569768119, now seen corresponding path program 18 times [2018-12-09 13:29:05,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:05,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:05,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:05,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:05,650 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:05,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:05,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:05,768 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:05,768 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:05,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:05,768 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:05,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:05,774 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:05,787 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:05,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:05,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:05,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:06,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:06,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2018-12-09 13:29:06,106 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:06,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-09 13:29:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-09 13:29:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-09 13:29:06,107 INFO L87 Difference]: Start difference. First operand 779 states and 907 transitions. Second operand 21 states. [2018-12-09 13:29:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:06,202 INFO L93 Difference]: Finished difference Result 1521 states and 1888 transitions. [2018-12-09 13:29:06,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-09 13:29:06,202 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2018-12-09 13:29:06,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:06,204 INFO L225 Difference]: With dead ends: 1521 [2018-12-09 13:29:06,204 INFO L226 Difference]: Without dead ends: 1519 [2018-12-09 13:29:06,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-09 13:29:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2018-12-09 13:29:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 824. [2018-12-09 13:29:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2018-12-09 13:29:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 960 transitions. [2018-12-09 13:29:06,216 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 960 transitions. Word has length 116 [2018-12-09 13:29:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:06,216 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 960 transitions. [2018-12-09 13:29:06,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-09 13:29:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 960 transitions. [2018-12-09 13:29:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-09 13:29:06,216 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:06,217 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 12, 12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:06,217 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:06,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1712069080, now seen corresponding path program 8 times [2018-12-09 13:29:06,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:06,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:06,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:06,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:06,218 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 312 proven. 420 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-12-09 13:29:06,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:06,314 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:06,314 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:06,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:06,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:06,314 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:06,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:06,320 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:06,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-12-09 13:29:06,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:06,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 386 proven. 164 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-12-09 13:29:06,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 386 proven. 164 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-12-09 13:29:06,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:06,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 33 [2018-12-09 13:29:06,545 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:06,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-09 13:29:06,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-09 13:29:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-12-09 13:29:06,546 INFO L87 Difference]: Start difference. First operand 824 states and 960 transitions. Second operand 24 states. [2018-12-09 13:29:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:06,605 INFO L93 Difference]: Finished difference Result 1750 states and 2066 transitions. [2018-12-09 13:29:06,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-09 13:29:06,605 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2018-12-09 13:29:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:06,606 INFO L225 Difference]: With dead ends: 1750 [2018-12-09 13:29:06,606 INFO L226 Difference]: Without dead ends: 999 [2018-12-09 13:29:06,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-12-09 13:29:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2018-12-09 13:29:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 980. [2018-12-09 13:29:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2018-12-09 13:29:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1141 transitions. [2018-12-09 13:29:06,617 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1141 transitions. Word has length 118 [2018-12-09 13:29:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:06,617 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 1141 transitions. [2018-12-09 13:29:06,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-09 13:29:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1141 transitions. [2018-12-09 13:29:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-12-09 13:29:06,618 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:06,618 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:06,618 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:06,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:06,618 INFO L82 PathProgramCache]: Analyzing trace with hash 497188386, now seen corresponding path program 19 times [2018-12-09 13:29:06,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:06,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:06,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:06,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:06,619 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:06,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:06,765 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:06,765 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:06,765 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:06,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:06,765 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:06,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:06,771 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:06,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:06,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:07,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:07,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2018-12-09 13:29:07,114 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:07,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 13:29:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 13:29:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-09 13:29:07,115 INFO L87 Difference]: Start difference. First operand 980 states and 1141 transitions. Second operand 22 states. [2018-12-09 13:29:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:07,244 INFO L93 Difference]: Finished difference Result 1918 states and 2383 transitions. [2018-12-09 13:29:07,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-09 13:29:07,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 122 [2018-12-09 13:29:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:07,247 INFO L225 Difference]: With dead ends: 1918 [2018-12-09 13:29:07,247 INFO L226 Difference]: Without dead ends: 1916 [2018-12-09 13:29:07,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-09 13:29:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2018-12-09 13:29:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1037. [2018-12-09 13:29:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-12-09 13:29:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1208 transitions. [2018-12-09 13:29:07,263 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1208 transitions. Word has length 122 [2018-12-09 13:29:07,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:07,263 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 1208 transitions. [2018-12-09 13:29:07,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 13:29:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1208 transitions. [2018-12-09 13:29:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-12-09 13:29:07,264 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:07,264 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:07,264 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:07,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:07,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1936852933, now seen corresponding path program 20 times [2018-12-09 13:29:07,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:07,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:07,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:07,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:07,265 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:07,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:07,424 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:07,424 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:07,424 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:07,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:07,424 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:07,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:07,431 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:07,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-12-09 13:29:07,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:07,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:07,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:07,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:07,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2018-12-09 13:29:07,801 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:07,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-09 13:29:07,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-09 13:29:07,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-09 13:29:07,802 INFO L87 Difference]: Start difference. First operand 1037 states and 1208 transitions. Second operand 23 states. [2018-12-09 13:29:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:07,963 INFO L93 Difference]: Finished difference Result 2033 states and 2527 transitions. [2018-12-09 13:29:07,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-09 13:29:07,963 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 128 [2018-12-09 13:29:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:07,966 INFO L225 Difference]: With dead ends: 2033 [2018-12-09 13:29:07,966 INFO L226 Difference]: Without dead ends: 2031 [2018-12-09 13:29:07,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-09 13:29:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2018-12-09 13:29:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1094. [2018-12-09 13:29:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2018-12-09 13:29:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1275 transitions. [2018-12-09 13:29:07,981 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1275 transitions. Word has length 128 [2018-12-09 13:29:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:07,982 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 1275 transitions. [2018-12-09 13:29:07,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-09 13:29:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1275 transitions. [2018-12-09 13:29:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-12-09 13:29:07,983 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:07,983 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:07,983 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:07,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1041122412, now seen corresponding path program 21 times [2018-12-09 13:29:07,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:07,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:07,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:07,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:07,984 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 1323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:08,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:08,141 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:08,141 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:08,141 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:08,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:08,141 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:08,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:08,153 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:08,165 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:08,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:08,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 1323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:08,177 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 1323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:08,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:08,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2018-12-09 13:29:08,526 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:08,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-09 13:29:08,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-09 13:29:08,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-09 13:29:08,527 INFO L87 Difference]: Start difference. First operand 1094 states and 1275 transitions. Second operand 24 states. [2018-12-09 13:29:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:08,651 INFO L93 Difference]: Finished difference Result 2148 states and 2671 transitions. [2018-12-09 13:29:08,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-09 13:29:08,651 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 134 [2018-12-09 13:29:08,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:08,654 INFO L225 Difference]: With dead ends: 2148 [2018-12-09 13:29:08,654 INFO L226 Difference]: Without dead ends: 2146 [2018-12-09 13:29:08,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-12-09 13:29:08,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2018-12-09 13:29:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1151. [2018-12-09 13:29:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2018-12-09 13:29:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1342 transitions. [2018-12-09 13:29:08,669 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1342 transitions. Word has length 134 [2018-12-09 13:29:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:08,669 INFO L480 AbstractCegarLoop]: Abstraction has 1151 states and 1342 transitions. [2018-12-09 13:29:08,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-09 13:29:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1342 transitions. [2018-12-09 13:29:08,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-12-09 13:29:08,670 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:08,670 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:08,670 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:08,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:08,670 INFO L82 PathProgramCache]: Analyzing trace with hash -465446867, now seen corresponding path program 22 times [2018-12-09 13:29:08,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:08,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:08,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:08,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:08,671 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:08,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:08,849 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:08,849 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:08,849 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:08,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:08,849 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:08,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:08,856 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:08,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:08,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:09,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:09,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2018-12-09 13:29:09,302 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:09,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-09 13:29:09,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-09 13:29:09,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-09 13:29:09,303 INFO L87 Difference]: Start difference. First operand 1151 states and 1342 transitions. Second operand 25 states. [2018-12-09 13:29:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:09,417 INFO L93 Difference]: Finished difference Result 2263 states and 2815 transitions. [2018-12-09 13:29:09,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-09 13:29:09,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 140 [2018-12-09 13:29:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:09,420 INFO L225 Difference]: With dead ends: 2263 [2018-12-09 13:29:09,421 INFO L226 Difference]: Without dead ends: 2261 [2018-12-09 13:29:09,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-09 13:29:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2018-12-09 13:29:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1208. [2018-12-09 13:29:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2018-12-09 13:29:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1409 transitions. [2018-12-09 13:29:09,437 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1409 transitions. Word has length 140 [2018-12-09 13:29:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:09,437 INFO L480 AbstractCegarLoop]: Abstraction has 1208 states and 1409 transitions. [2018-12-09 13:29:09,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-09 13:29:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1409 transitions. [2018-12-09 13:29:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-12-09 13:29:09,438 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:09,438 INFO L402 BasicCegarLoop]: trace histogram [23, 22, 22, 14, 14, 14, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:09,438 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:09,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1913133440, now seen corresponding path program 9 times [2018-12-09 13:29:09,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:09,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:09,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:09,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:09,440 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 478 proven. 574 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-12-09 13:29:09,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:09,546 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:09,546 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:09,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:09,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:09,546 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:09,552 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:09,552 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:09,567 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:09,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:09,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 478 proven. 574 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-12-09 13:29:09,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 478 proven. 574 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-12-09 13:29:09,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:09,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2018-12-09 13:29:09,781 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:09,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 13:29:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 13:29:09,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-09 13:29:09,782 INFO L87 Difference]: Start difference. First operand 1208 states and 1409 transitions. Second operand 17 states. [2018-12-09 13:29:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:09,822 INFO L93 Difference]: Finished difference Result 2341 states and 2744 transitions. [2018-12-09 13:29:09,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-09 13:29:09,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 142 [2018-12-09 13:29:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:09,824 INFO L225 Difference]: With dead ends: 2341 [2018-12-09 13:29:09,824 INFO L226 Difference]: Without dead ends: 1218 [2018-12-09 13:29:09,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-09 13:29:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2018-12-09 13:29:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1214. [2018-12-09 13:29:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2018-12-09 13:29:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1415 transitions. [2018-12-09 13:29:09,843 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1415 transitions. Word has length 142 [2018-12-09 13:29:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:09,843 INFO L480 AbstractCegarLoop]: Abstraction has 1214 states and 1415 transitions. [2018-12-09 13:29:09,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 13:29:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1415 transitions. [2018-12-09 13:29:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-12-09 13:29:09,844 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:09,844 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:09,845 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:09,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash -693740026, now seen corresponding path program 23 times [2018-12-09 13:29:09,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:09,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:09,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:09,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:09,846 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 1587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:10,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:10,029 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:10,029 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:10,029 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:10,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:10,029 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:10,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:10,036 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:10,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-09 13:29:10,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:10,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 1587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:10,079 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 1587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:10,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:10,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2018-12-09 13:29:10,535 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:10,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-09 13:29:10,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-09 13:29:10,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-09 13:29:10,536 INFO L87 Difference]: Start difference. First operand 1214 states and 1415 transitions. Second operand 26 states. [2018-12-09 13:29:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:10,643 INFO L93 Difference]: Finished difference Result 2384 states and 2965 transitions. [2018-12-09 13:29:10,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-09 13:29:10,643 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 146 [2018-12-09 13:29:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:10,646 INFO L225 Difference]: With dead ends: 2384 [2018-12-09 13:29:10,646 INFO L226 Difference]: Without dead ends: 2382 [2018-12-09 13:29:10,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-09 13:29:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2018-12-09 13:29:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1271. [2018-12-09 13:29:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2018-12-09 13:29:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1482 transitions. [2018-12-09 13:29:10,664 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1482 transitions. Word has length 146 [2018-12-09 13:29:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:10,664 INFO L480 AbstractCegarLoop]: Abstraction has 1271 states and 1482 transitions. [2018-12-09 13:29:10,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-09 13:29:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1482 transitions. [2018-12-09 13:29:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-09 13:29:10,665 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:10,665 INFO L402 BasicCegarLoop]: trace histogram [24, 23, 23, 15, 15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:10,665 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:10,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2035440153, now seen corresponding path program 10 times [2018-12-09 13:29:10,666 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:10,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:10,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:10,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:10,666 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 511 proven. 660 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-12-09 13:29:10,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:10,769 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:10,769 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:10,769 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:10,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:10,769 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:10,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:10,775 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:10,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 511 proven. 660 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-12-09 13:29:10,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 511 proven. 660 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-12-09 13:29:11,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:11,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2018-12-09 13:29:11,001 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:11,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 13:29:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 13:29:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-09 13:29:11,002 INFO L87 Difference]: Start difference. First operand 1271 states and 1482 transitions. Second operand 18 states. [2018-12-09 13:29:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:11,050 INFO L93 Difference]: Finished difference Result 2461 states and 2884 transitions. [2018-12-09 13:29:11,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 13:29:11,050 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 148 [2018-12-09 13:29:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:11,052 INFO L225 Difference]: With dead ends: 2461 [2018-12-09 13:29:11,052 INFO L226 Difference]: Without dead ends: 1281 [2018-12-09 13:29:11,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-12-09 13:29:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2018-12-09 13:29:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1277. [2018-12-09 13:29:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1277 states. [2018-12-09 13:29:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1488 transitions. [2018-12-09 13:29:11,074 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1488 transitions. Word has length 148 [2018-12-09 13:29:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:11,074 INFO L480 AbstractCegarLoop]: Abstraction has 1277 states and 1488 transitions. [2018-12-09 13:29:11,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 13:29:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1488 transitions. [2018-12-09 13:29:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-12-09 13:29:11,074 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:11,074 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:11,075 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:11,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash -503620321, now seen corresponding path program 24 times [2018-12-09 13:29:11,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:11,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:11,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:11,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:11,076 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 1728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:11,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:11,276 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:11,276 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:11,276 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:11,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:11,276 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:11,282 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:11,282 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:11,295 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:11,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:11,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 1728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:11,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 1728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:11,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:11,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2018-12-09 13:29:11,777 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:11,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-09 13:29:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-09 13:29:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 13:29:11,778 INFO L87 Difference]: Start difference. First operand 1277 states and 1488 transitions. Second operand 27 states. [2018-12-09 13:29:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:11,903 INFO L93 Difference]: Finished difference Result 2505 states and 3115 transitions. [2018-12-09 13:29:11,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-09 13:29:11,903 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 152 [2018-12-09 13:29:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:11,906 INFO L225 Difference]: With dead ends: 2505 [2018-12-09 13:29:11,906 INFO L226 Difference]: Without dead ends: 2503 [2018-12-09 13:29:11,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 13:29:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2018-12-09 13:29:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1334. [2018-12-09 13:29:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1334 states. [2018-12-09 13:29:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1555 transitions. [2018-12-09 13:29:11,923 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1555 transitions. Word has length 152 [2018-12-09 13:29:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:11,923 INFO L480 AbstractCegarLoop]: Abstraction has 1334 states and 1555 transitions. [2018-12-09 13:29:11,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-09 13:29:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1555 transitions. [2018-12-09 13:29:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-12-09 13:29:11,924 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:11,924 INFO L402 BasicCegarLoop]: trace histogram [25, 24, 24, 16, 16, 16, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:11,924 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:11,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash 56882930, now seen corresponding path program 11 times [2018-12-09 13:29:11,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:11,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:11,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:11,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:11,925 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 544 proven. 752 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-12-09 13:29:12,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:12,031 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:12,031 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:12,031 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:12,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:12,031 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:12,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:12,040 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:12,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-09 13:29:12,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:12,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 603 proven. 225 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-12-09 13:29:12,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 603 proven. 225 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-12-09 13:29:12,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:12,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 39 [2018-12-09 13:29:12,339 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:12,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-09 13:29:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-09 13:29:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-09 13:29:12,340 INFO L87 Difference]: Start difference. First operand 1334 states and 1555 transitions. Second operand 29 states. [2018-12-09 13:29:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:12,405 INFO L93 Difference]: Finished difference Result 2707 states and 3176 transitions. [2018-12-09 13:29:12,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-09 13:29:12,405 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 154 [2018-12-09 13:29:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:12,407 INFO L225 Difference]: With dead ends: 2707 [2018-12-09 13:29:12,407 INFO L226 Difference]: Without dead ends: 1470 [2018-12-09 13:29:12,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-09 13:29:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2018-12-09 13:29:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1445. [2018-12-09 13:29:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1445 states. [2018-12-09 13:29:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 1683 transitions. [2018-12-09 13:29:12,422 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 1683 transitions. Word has length 154 [2018-12-09 13:29:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:12,422 INFO L480 AbstractCegarLoop]: Abstraction has 1445 states and 1683 transitions. [2018-12-09 13:29:12,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-09 13:29:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 1683 transitions. [2018-12-09 13:29:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-09 13:29:12,423 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:12,423 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:12,423 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:12,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1647254152, now seen corresponding path program 25 times [2018-12-09 13:29:12,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:12,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:12,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:12,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:12,424 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:12,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:12,608 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:12,608 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:12,608 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:12,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:12,608 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:12,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:12,615 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:12,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:12,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:13,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:13,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2018-12-09 13:29:13,117 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:13,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-09 13:29:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-09 13:29:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-09 13:29:13,118 INFO L87 Difference]: Start difference. First operand 1445 states and 1683 transitions. Second operand 28 states. [2018-12-09 13:29:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:13,271 INFO L93 Difference]: Finished difference Result 2833 states and 3523 transitions. [2018-12-09 13:29:13,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-09 13:29:13,272 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 158 [2018-12-09 13:29:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:13,274 INFO L225 Difference]: With dead ends: 2833 [2018-12-09 13:29:13,274 INFO L226 Difference]: Without dead ends: 2831 [2018-12-09 13:29:13,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-12-09 13:29:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2018-12-09 13:29:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1508. [2018-12-09 13:29:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1508 states. [2018-12-09 13:29:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 1757 transitions. [2018-12-09 13:29:13,308 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 1757 transitions. Word has length 158 [2018-12-09 13:29:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:13,308 INFO L480 AbstractCegarLoop]: Abstraction has 1508 states and 1757 transitions. [2018-12-09 13:29:13,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-09 13:29:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 1757 transitions. [2018-12-09 13:29:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-12-09 13:29:13,308 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:13,308 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:13,309 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:13,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash 426444561, now seen corresponding path program 26 times [2018-12-09 13:29:13,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:13,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:13,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:13,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:13,309 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 2028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:13,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:13,535 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:13,535 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:13,536 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:13,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:13,536 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/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 [2018-12-09 13:29:13,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:13,543 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:13,572 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-09 13:29:13,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:13,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 2028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:13,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 2028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:14,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:14,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2018-12-09 13:29:14,130 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:14,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-09 13:29:14,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-09 13:29:14,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-12-09 13:29:14,131 INFO L87 Difference]: Start difference. First operand 1508 states and 1757 transitions. Second operand 29 states. [2018-12-09 13:29:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:14,312 INFO L93 Difference]: Finished difference Result 2960 states and 3682 transitions. [2018-12-09 13:29:14,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-09 13:29:14,312 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 164 [2018-12-09 13:29:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:14,315 INFO L225 Difference]: With dead ends: 2960 [2018-12-09 13:29:14,315 INFO L226 Difference]: Without dead ends: 2958 [2018-12-09 13:29:14,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-12-09 13:29:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2018-12-09 13:29:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 1571. [2018-12-09 13:29:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2018-12-09 13:29:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 1831 transitions. [2018-12-09 13:29:14,337 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 1831 transitions. Word has length 164 [2018-12-09 13:29:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:14,337 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 1831 transitions. [2018-12-09 13:29:14,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-09 13:29:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 1831 transitions. [2018-12-09 13:29:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-12-09 13:29:14,338 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:14,338 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:14,338 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:14,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1153552874, now seen corresponding path program 27 times [2018-12-09 13:29:14,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:14,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:14,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:14,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:14,339 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 2187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:14,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:14,606 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:14,606 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:14,606 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:14,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:14,606 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:14,612 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:14,612 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:14,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:14,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:14,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 2187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:14,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 2187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:15,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:15,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2018-12-09 13:29:15,247 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:15,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-09 13:29:15,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-09 13:29:15,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-12-09 13:29:15,247 INFO L87 Difference]: Start difference. First operand 1571 states and 1831 transitions. Second operand 30 states. [2018-12-09 13:29:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:15,376 INFO L93 Difference]: Finished difference Result 3087 states and 3841 transitions. [2018-12-09 13:29:15,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-09 13:29:15,376 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 170 [2018-12-09 13:29:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:15,380 INFO L225 Difference]: With dead ends: 3087 [2018-12-09 13:29:15,380 INFO L226 Difference]: Without dead ends: 3085 [2018-12-09 13:29:15,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-12-09 13:29:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2018-12-09 13:29:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 1634. [2018-12-09 13:29:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1634 states. [2018-12-09 13:29:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 1905 transitions. [2018-12-09 13:29:15,413 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 1905 transitions. Word has length 170 [2018-12-09 13:29:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:15,414 INFO L480 AbstractCegarLoop]: Abstraction has 1634 states and 1905 transitions. [2018-12-09 13:29:15,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-09 13:29:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 1905 transitions. [2018-12-09 13:29:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-12-09 13:29:15,415 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:15,415 INFO L402 BasicCegarLoop]: trace histogram [28, 27, 27, 18, 18, 18, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:15,415 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:15,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash 78452471, now seen corresponding path program 12 times [2018-12-09 13:29:15,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:15,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:15,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:15,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:15,416 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1881 backedges. 684 proven. 954 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-12-09 13:29:15,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:15,534 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:15,534 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:15,534 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:15,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:15,535 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:15,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:15,541 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:15,555 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:15,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:15,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1881 backedges. 684 proven. 954 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-12-09 13:29:15,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1881 backedges. 684 proven. 954 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-12-09 13:29:15,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:15,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2018-12-09 13:29:15,897 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:15,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-09 13:29:15,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-09 13:29:15,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-09 13:29:15,898 INFO L87 Difference]: Start difference. First operand 1634 states and 1905 transitions. Second operand 21 states. [2018-12-09 13:29:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:15,947 INFO L93 Difference]: Finished difference Result 3169 states and 3712 transitions. [2018-12-09 13:29:15,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-09 13:29:15,947 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 172 [2018-12-09 13:29:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:15,949 INFO L225 Difference]: With dead ends: 3169 [2018-12-09 13:29:15,949 INFO L226 Difference]: Without dead ends: 1644 [2018-12-09 13:29:15,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-09 13:29:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2018-12-09 13:29:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1640. [2018-12-09 13:29:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2018-12-09 13:29:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1911 transitions. [2018-12-09 13:29:15,966 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1911 transitions. Word has length 172 [2018-12-09 13:29:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:15,966 INFO L480 AbstractCegarLoop]: Abstraction has 1640 states and 1911 transitions. [2018-12-09 13:29:15,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-09 13:29:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1911 transitions. [2018-12-09 13:29:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-12-09 13:29:15,967 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:15,967 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:15,967 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:15,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:15,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1719577085, now seen corresponding path program 28 times [2018-12-09 13:29:15,968 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:15,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:15,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:15,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:15,968 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:16,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:16,204 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:16,204 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:16,204 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:16,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:16,204 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:16,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:16,211 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:16,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:16,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:16,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:16,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2018-12-09 13:29:16,850 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:16,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-09 13:29:16,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-09 13:29:16,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-12-09 13:29:16,850 INFO L87 Difference]: Start difference. First operand 1640 states and 1911 transitions. Second operand 31 states. [2018-12-09 13:29:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:17,008 INFO L93 Difference]: Finished difference Result 3220 states and 4006 transitions. [2018-12-09 13:29:17,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-09 13:29:17,008 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 176 [2018-12-09 13:29:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:17,010 INFO L225 Difference]: With dead ends: 3220 [2018-12-09 13:29:17,011 INFO L226 Difference]: Without dead ends: 3218 [2018-12-09 13:29:17,011 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-12-09 13:29:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2018-12-09 13:29:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 1703. [2018-12-09 13:29:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1703 states. [2018-12-09 13:29:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 1985 transitions. [2018-12-09 13:29:17,034 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 1985 transitions. Word has length 176 [2018-12-09 13:29:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:17,034 INFO L480 AbstractCegarLoop]: Abstraction has 1703 states and 1985 transitions. [2018-12-09 13:29:17,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-09 13:29:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 1985 transitions. [2018-12-09 13:29:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-09 13:29:17,035 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:17,035 INFO L402 BasicCegarLoop]: trace histogram [29, 28, 28, 19, 19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:17,035 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:17,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:17,036 INFO L82 PathProgramCache]: Analyzing trace with hash 664533200, now seen corresponding path program 13 times [2018-12-09 13:29:17,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:17,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:17,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:17,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:17,036 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 721 proven. 1064 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-12-09 13:29:17,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:17,177 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:17,177 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:17,177 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:17,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:17,177 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:17,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:17,184 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:17,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 721 proven. 1064 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-12-09 13:29:17,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 721 proven. 1064 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-12-09 13:29:17,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:17,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2018-12-09 13:29:17,548 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:17,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 13:29:17,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 13:29:17,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-09 13:29:17,548 INFO L87 Difference]: Start difference. First operand 1703 states and 1985 transitions. Second operand 22 states. [2018-12-09 13:29:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:17,593 INFO L93 Difference]: Finished difference Result 3301 states and 3866 transitions. [2018-12-09 13:29:17,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-09 13:29:17,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 178 [2018-12-09 13:29:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:17,594 INFO L225 Difference]: With dead ends: 3301 [2018-12-09 13:29:17,594 INFO L226 Difference]: Without dead ends: 1713 [2018-12-09 13:29:17,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-09 13:29:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2018-12-09 13:29:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1709. [2018-12-09 13:29:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2018-12-09 13:29:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 1991 transitions. [2018-12-09 13:29:17,611 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 1991 transitions. Word has length 178 [2018-12-09 13:29:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:17,611 INFO L480 AbstractCegarLoop]: Abstraction has 1709 states and 1991 transitions. [2018-12-09 13:29:17,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 13:29:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 1991 transitions. [2018-12-09 13:29:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-12-09 13:29:17,611 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:17,611 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:17,612 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:17,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash 67740508, now seen corresponding path program 29 times [2018-12-09 13:29:17,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:17,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:17,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:17,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:17,612 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 2523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:17,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:17,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:17,841 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:17,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:17,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:17,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:17,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:17,848 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:17,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-09 13:29:17,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:17,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 2523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:17,909 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 2523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:18,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:18,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2018-12-09 13:29:18,554 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:18,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-09 13:29:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-09 13:29:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-12-09 13:29:18,555 INFO L87 Difference]: Start difference. First operand 1709 states and 1991 transitions. Second operand 32 states. [2018-12-09 13:29:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:18,719 INFO L93 Difference]: Finished difference Result 3353 states and 4171 transitions. [2018-12-09 13:29:18,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-09 13:29:18,720 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 182 [2018-12-09 13:29:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:18,722 INFO L225 Difference]: With dead ends: 3353 [2018-12-09 13:29:18,722 INFO L226 Difference]: Without dead ends: 3351 [2018-12-09 13:29:18,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-12-09 13:29:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2018-12-09 13:29:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 1772. [2018-12-09 13:29:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1772 states. [2018-12-09 13:29:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2065 transitions. [2018-12-09 13:29:18,745 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2065 transitions. Word has length 182 [2018-12-09 13:29:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:18,746 INFO L480 AbstractCegarLoop]: Abstraction has 1772 states and 2065 transitions. [2018-12-09 13:29:18,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-09 13:29:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2065 transitions. [2018-12-09 13:29:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-12-09 13:29:18,746 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:18,746 INFO L402 BasicCegarLoop]: trace histogram [30, 29, 29, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:18,746 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:18,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:18,747 INFO L82 PathProgramCache]: Analyzing trace with hash 289821673, now seen corresponding path program 14 times [2018-12-09 13:29:18,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:18,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:18,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:18,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:18,747 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 758 proven. 1180 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-12-09 13:29:18,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:18,899 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:18,899 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:18,899 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:18,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:18,899 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:18,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:18,905 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:18,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-12-09 13:29:18,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:18,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 904 proven. 323 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2018-12-09 13:29:19,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 904 proven. 323 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2018-12-09 13:29:19,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:19,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 47 [2018-12-09 13:29:19,336 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:19,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-09 13:29:19,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-09 13:29:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-12-09 13:29:19,337 INFO L87 Difference]: Start difference. First operand 1772 states and 2065 transitions. Second operand 35 states. [2018-12-09 13:29:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:19,427 INFO L93 Difference]: Finished difference Result 3705 states and 4364 transitions. [2018-12-09 13:29:19,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-09 13:29:19,428 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 184 [2018-12-09 13:29:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:19,429 INFO L225 Difference]: With dead ends: 3705 [2018-12-09 13:29:19,429 INFO L226 Difference]: Without dead ends: 2054 [2018-12-09 13:29:19,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-12-09 13:29:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2018-12-09 13:29:19,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 2024. [2018-12-09 13:29:19,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2024 states. [2018-12-09 13:29:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2358 transitions. [2018-12-09 13:29:19,449 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2358 transitions. Word has length 184 [2018-12-09 13:29:19,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:19,449 INFO L480 AbstractCegarLoop]: Abstraction has 2024 states and 2358 transitions. [2018-12-09 13:29:19,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-09 13:29:19,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2358 transitions. [2018-12-09 13:29:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-09 13:29:19,450 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:19,450 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:19,450 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:19,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash 208587253, now seen corresponding path program 30 times [2018-12-09 13:29:19,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:19,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:19,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:19,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:19,451 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:19,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:19,710 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:19,710 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:19,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:19,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:19,710 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:19,719 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:19,719 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:19,739 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:19,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:19,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:19,764 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:20,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:20,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2018-12-09 13:29:20,441 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:20,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-09 13:29:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-09 13:29:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-12-09 13:29:20,442 INFO L87 Difference]: Start difference. First operand 2024 states and 2358 transitions. Second operand 33 states. [2018-12-09 13:29:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:20,610 INFO L93 Difference]: Finished difference Result 3978 states and 4951 transitions. [2018-12-09 13:29:20,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-09 13:29:20,610 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 188 [2018-12-09 13:29:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:20,612 INFO L225 Difference]: With dead ends: 3978 [2018-12-09 13:29:20,612 INFO L226 Difference]: Without dead ends: 3976 [2018-12-09 13:29:20,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-12-09 13:29:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2018-12-09 13:29:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 2099. [2018-12-09 13:29:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2099 states. [2018-12-09 13:29:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2446 transitions. [2018-12-09 13:29:20,642 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2446 transitions. Word has length 188 [2018-12-09 13:29:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:20,642 INFO L480 AbstractCegarLoop]: Abstraction has 2099 states and 2446 transitions. [2018-12-09 13:29:20,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-09 13:29:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2446 transitions. [2018-12-09 13:29:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-12-09 13:29:20,643 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:20,643 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:20,643 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:20,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:20,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1064884686, now seen corresponding path program 31 times [2018-12-09 13:29:20,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:20,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:20,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:20,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:20,644 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 2883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:20,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:20,917 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:20,917 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:20,917 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:20,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:20,917 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:20,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:20,924 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:20,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 2883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:20,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 2883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:21,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:21,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2018-12-09 13:29:21,677 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:21,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-09 13:29:21,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-09 13:29:21,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-12-09 13:29:21,678 INFO L87 Difference]: Start difference. First operand 2099 states and 2446 transitions. Second operand 34 states. [2018-12-09 13:29:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:21,871 INFO L93 Difference]: Finished difference Result 4129 states and 5140 transitions. [2018-12-09 13:29:21,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-09 13:29:21,872 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 194 [2018-12-09 13:29:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:21,874 INFO L225 Difference]: With dead ends: 4129 [2018-12-09 13:29:21,874 INFO L226 Difference]: Without dead ends: 4127 [2018-12-09 13:29:21,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-12-09 13:29:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2018-12-09 13:29:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 2174. [2018-12-09 13:29:21,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2174 states. [2018-12-09 13:29:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 2534 transitions. [2018-12-09 13:29:21,904 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 2534 transitions. Word has length 194 [2018-12-09 13:29:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:21,904 INFO L480 AbstractCegarLoop]: Abstraction has 2174 states and 2534 transitions. [2018-12-09 13:29:21,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-09 13:29:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 2534 transitions. [2018-12-09 13:29:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-12-09 13:29:21,905 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:21,905 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:21,905 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:21,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash -677125401, now seen corresponding path program 32 times [2018-12-09 13:29:21,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:21,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:21,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:21,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:21,906 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 3072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:22,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:22,201 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:22,201 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:22,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:22,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:22,201 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:22,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:22,207 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:22,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-09 13:29:22,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:22,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 3072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:22,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 3072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:23,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:23,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2018-12-09 13:29:23,026 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:23,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-09 13:29:23,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-09 13:29:23,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-12-09 13:29:23,027 INFO L87 Difference]: Start difference. First operand 2174 states and 2534 transitions. Second operand 35 states. [2018-12-09 13:29:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:23,230 INFO L93 Difference]: Finished difference Result 4280 states and 5329 transitions. [2018-12-09 13:29:23,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-09 13:29:23,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 200 [2018-12-09 13:29:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:23,233 INFO L225 Difference]: With dead ends: 4280 [2018-12-09 13:29:23,233 INFO L226 Difference]: Without dead ends: 4278 [2018-12-09 13:29:23,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-12-09 13:29:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2018-12-09 13:29:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 2249. [2018-12-09 13:29:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2249 states. [2018-12-09 13:29:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 2622 transitions. [2018-12-09 13:29:23,274 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 2622 transitions. Word has length 200 [2018-12-09 13:29:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:23,274 INFO L480 AbstractCegarLoop]: Abstraction has 2249 states and 2622 transitions. [2018-12-09 13:29:23,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-09 13:29:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 2622 transitions. [2018-12-09 13:29:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-12-09 13:29:23,275 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:23,275 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:23,275 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:23,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1507855040, now seen corresponding path program 33 times [2018-12-09 13:29:23,275 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:23,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:23,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:23,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:23,276 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:23,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:23,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:23,585 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:23,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:23,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:23,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:23,592 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:23,592 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:23,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:23,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:23,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:23,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:24,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:24,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2018-12-09 13:29:24,472 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:24,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-09 13:29:24,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-09 13:29:24,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-12-09 13:29:24,472 INFO L87 Difference]: Start difference. First operand 2249 states and 2622 transitions. Second operand 36 states. [2018-12-09 13:29:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:24,665 INFO L93 Difference]: Finished difference Result 4431 states and 5518 transitions. [2018-12-09 13:29:24,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-09 13:29:24,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 206 [2018-12-09 13:29:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:24,668 INFO L225 Difference]: With dead ends: 4431 [2018-12-09 13:29:24,668 INFO L226 Difference]: Without dead ends: 4429 [2018-12-09 13:29:24,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-12-09 13:29:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2018-12-09 13:29:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 2324. [2018-12-09 13:29:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2324 states. [2018-12-09 13:29:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 2710 transitions. [2018-12-09 13:29:24,704 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 2710 transitions. Word has length 206 [2018-12-09 13:29:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:24,704 INFO L480 AbstractCegarLoop]: Abstraction has 2324 states and 2710 transitions. [2018-12-09 13:29:24,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-09 13:29:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 2710 transitions. [2018-12-09 13:29:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-09 13:29:24,705 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:24,705 INFO L402 BasicCegarLoop]: trace histogram [34, 33, 33, 22, 22, 22, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:24,705 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:24,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1407784513, now seen corresponding path program 15 times [2018-12-09 13:29:24,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:24,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:24,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:24,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:24,706 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 1012 proven. 1430 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-12-09 13:29:24,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:24,879 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:24,879 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:24,879 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:24,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:24,879 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:24,885 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:24,885 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:24,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:24,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:24,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 1012 proven. 1430 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-12-09 13:29:24,923 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 1012 proven. 1430 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-12-09 13:29:25,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:25,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2018-12-09 13:29:25,367 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:25,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-09 13:29:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-09 13:29:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-09 13:29:25,367 INFO L87 Difference]: Start difference. First operand 2324 states and 2710 transitions. Second operand 25 states. [2018-12-09 13:29:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:25,420 INFO L93 Difference]: Finished difference Result 4525 states and 5298 transitions. [2018-12-09 13:29:25,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-09 13:29:25,421 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 208 [2018-12-09 13:29:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:25,422 INFO L225 Difference]: With dead ends: 4525 [2018-12-09 13:29:25,422 INFO L226 Difference]: Without dead ends: 2334 [2018-12-09 13:29:25,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-09 13:29:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2018-12-09 13:29:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2330. [2018-12-09 13:29:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2330 states. [2018-12-09 13:29:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 2716 transitions. [2018-12-09 13:29:25,446 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 2716 transitions. Word has length 208 [2018-12-09 13:29:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:25,446 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 2716 transitions. [2018-12-09 13:29:25,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-09 13:29:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 2716 transitions. [2018-12-09 13:29:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-12-09 13:29:25,447 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:25,447 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:25,447 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:25,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1003561177, now seen corresponding path program 34 times [2018-12-09 13:29:25,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:25,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:25,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:25,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:25,448 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 3468 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:25,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:25,763 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:25,763 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:25,763 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:25,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:25,763 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:25,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:25,772 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:25,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 3468 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:25,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 3468 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:26,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:26,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 71 [2018-12-09 13:29:26,692 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:26,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-09 13:29:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-09 13:29:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-12-09 13:29:26,693 INFO L87 Difference]: Start difference. First operand 2330 states and 2716 transitions. Second operand 37 states. [2018-12-09 13:29:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:26,908 INFO L93 Difference]: Finished difference Result 4588 states and 5713 transitions. [2018-12-09 13:29:26,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-09 13:29:26,908 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 212 [2018-12-09 13:29:26,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:26,911 INFO L225 Difference]: With dead ends: 4588 [2018-12-09 13:29:26,911 INFO L226 Difference]: Without dead ends: 4586 [2018-12-09 13:29:26,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-12-09 13:29:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2018-12-09 13:29:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 2405. [2018-12-09 13:29:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2405 states. [2018-12-09 13:29:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 2804 transitions. [2018-12-09 13:29:26,945 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 2804 transitions. Word has length 212 [2018-12-09 13:29:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:26,945 INFO L480 AbstractCegarLoop]: Abstraction has 2405 states and 2804 transitions. [2018-12-09 13:29:26,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-09 13:29:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 2804 transitions. [2018-12-09 13:29:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-12-09 13:29:26,946 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:26,946 INFO L402 BasicCegarLoop]: trace histogram [35, 34, 34, 23, 23, 23, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:26,946 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:26,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:26,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1107148698, now seen corresponding path program 16 times [2018-12-09 13:29:26,946 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:26,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:26,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:26,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:26,947 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2984 backedges. 1057 proven. 1564 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-12-09 13:29:27,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:27,136 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:27,136 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:27,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:27,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:27,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:27,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:27,143 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:27,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2984 backedges. 1057 proven. 1564 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-12-09 13:29:27,181 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2984 backedges. 1057 proven. 1564 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-12-09 13:29:27,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:27,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 50 [2018-12-09 13:29:27,613 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:27,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-09 13:29:27,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-09 13:29:27,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-09 13:29:27,613 INFO L87 Difference]: Start difference. First operand 2405 states and 2804 transitions. Second operand 26 states. [2018-12-09 13:29:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:27,672 INFO L93 Difference]: Finished difference Result 4681 states and 5480 transitions. [2018-12-09 13:29:27,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-09 13:29:27,673 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 214 [2018-12-09 13:29:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:27,674 INFO L225 Difference]: With dead ends: 4681 [2018-12-09 13:29:27,675 INFO L226 Difference]: Without dead ends: 2415 [2018-12-09 13:29:27,677 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-12-09 13:29:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2018-12-09 13:29:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2411. [2018-12-09 13:29:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2411 states. [2018-12-09 13:29:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 2810 transitions. [2018-12-09 13:29:27,701 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 2810 transitions. Word has length 214 [2018-12-09 13:29:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:27,701 INFO L480 AbstractCegarLoop]: Abstraction has 2411 states and 2810 transitions. [2018-12-09 13:29:27,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-09 13:29:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 2810 transitions. [2018-12-09 13:29:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-09 13:29:27,703 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:27,703 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:27,703 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:27,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1380939186, now seen corresponding path program 35 times [2018-12-09 13:29:27,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:27,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:27,704 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:28,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:28,049 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:28,049 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:28,049 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:28,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:28,049 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:28,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:28,056 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:28,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-12-09 13:29:28,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:28,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:28,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:29,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:29,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2018-12-09 13:29:29,025 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:29,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-09 13:29:29,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-09 13:29:29,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-12-09 13:29:29,025 INFO L87 Difference]: Start difference. First operand 2411 states and 2810 transitions. Second operand 38 states. [2018-12-09 13:29:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:29,206 INFO L93 Difference]: Finished difference Result 4745 states and 5908 transitions. [2018-12-09 13:29:29,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-09 13:29:29,207 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 218 [2018-12-09 13:29:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:29,210 INFO L225 Difference]: With dead ends: 4745 [2018-12-09 13:29:29,210 INFO L226 Difference]: Without dead ends: 4743 [2018-12-09 13:29:29,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-12-09 13:29:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2018-12-09 13:29:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 2486. [2018-12-09 13:29:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2486 states. [2018-12-09 13:29:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 2898 transitions. [2018-12-09 13:29:29,247 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 2898 transitions. Word has length 218 [2018-12-09 13:29:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:29,247 INFO L480 AbstractCegarLoop]: Abstraction has 2486 states and 2898 transitions. [2018-12-09 13:29:29,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-09 13:29:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 2898 transitions. [2018-12-09 13:29:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-12-09 13:29:29,248 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:29,249 INFO L402 BasicCegarLoop]: trace histogram [36, 35, 35, 24, 24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:29,249 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:29,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1304804813, now seen corresponding path program 17 times [2018-12-09 13:29:29,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:29,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:29,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:29,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:29,250 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3169 backedges. 1450 proven. 1299 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-12-09 13:29:29,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:29,439 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:29,439 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:29,439 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:29,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:29,439 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:29,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:29,445 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:29,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-12-09 13:29:29,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:29,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3169 backedges. 1197 proven. 408 refuted. 0 times theorem prover too weak. 1564 trivial. 0 not checked. [2018-12-09 13:29:29,480 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3169 backedges. 1197 proven. 408 refuted. 0 times theorem prover too weak. 1564 trivial. 0 not checked. [2018-12-09 13:29:29,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:29,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 38 [2018-12-09 13:29:29,705 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:29,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-09 13:29:29,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-09 13:29:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-09 13:29:29,706 INFO L87 Difference]: Start difference. First operand 2486 states and 2898 transitions. Second operand 26 states. [2018-12-09 13:29:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:29,788 INFO L93 Difference]: Finished difference Result 3891 states and 4747 transitions. [2018-12-09 13:29:29,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-09 13:29:29,789 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 220 [2018-12-09 13:29:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:29,792 INFO L225 Difference]: With dead ends: 3891 [2018-12-09 13:29:29,792 INFO L226 Difference]: Without dead ends: 3890 [2018-12-09 13:29:29,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-09 13:29:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2018-12-09 13:29:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3854. [2018-12-09 13:29:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3854 states. [2018-12-09 13:29:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 4500 transitions. [2018-12-09 13:29:29,832 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 4500 transitions. Word has length 220 [2018-12-09 13:29:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:29,832 INFO L480 AbstractCegarLoop]: Abstraction has 3854 states and 4500 transitions. [2018-12-09 13:29:29,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-09 13:29:29,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 4500 transitions. [2018-12-09 13:29:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-12-09 13:29:29,833 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:29,833 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:29,834 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:29,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1961296843, now seen corresponding path program 36 times [2018-12-09 13:29:29,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:29,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:29,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:29,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:29,835 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 0 proven. 3888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:30,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:30,197 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:30,197 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:30,197 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:30,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:30,197 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:30,203 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:30,203 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:30,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:30,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:30,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 0 proven. 3888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:30,250 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 0 proven. 3888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:31,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:31,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2018-12-09 13:29:31,189 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:31,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-09 13:29:31,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-09 13:29:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-12-09 13:29:31,190 INFO L87 Difference]: Start difference. First operand 3854 states and 4500 transitions. Second operand 39 states. [2018-12-09 13:29:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:31,392 INFO L93 Difference]: Finished difference Result 7668 states and 9571 transitions. [2018-12-09 13:29:31,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-09 13:29:31,392 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 224 [2018-12-09 13:29:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:31,396 INFO L225 Difference]: With dead ends: 7668 [2018-12-09 13:29:31,397 INFO L226 Difference]: Without dead ends: 7666 [2018-12-09 13:29:31,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-12-09 13:29:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7666 states. [2018-12-09 13:29:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7666 to 4001. [2018-12-09 13:29:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4001 states. [2018-12-09 13:29:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 4672 transitions. [2018-12-09 13:29:31,473 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 4672 transitions. Word has length 224 [2018-12-09 13:29:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:31,473 INFO L480 AbstractCegarLoop]: Abstraction has 4001 states and 4672 transitions. [2018-12-09 13:29:31,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-09 13:29:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 4672 transitions. [2018-12-09 13:29:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-12-09 13:29:31,475 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:31,475 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:31,475 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:31,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:31,475 INFO L82 PathProgramCache]: Analyzing trace with hash -375923932, now seen corresponding path program 37 times [2018-12-09 13:29:31,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:31,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:31,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:31,476 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 0 proven. 4107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:31,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:31,853 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:31,853 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:31,853 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:31,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:31,853 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:31,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:31,860 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:31,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 0 proven. 4107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:31,906 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 0 proven. 4107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:32,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:32,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2018-12-09 13:29:32,913 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:32,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-09 13:29:32,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-09 13:29:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-12-09 13:29:32,914 INFO L87 Difference]: Start difference. First operand 4001 states and 4672 transitions. Second operand 40 states. [2018-12-09 13:29:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:33,135 INFO L93 Difference]: Finished difference Result 7963 states and 9940 transitions. [2018-12-09 13:29:33,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-09 13:29:33,136 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 230 [2018-12-09 13:29:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:33,141 INFO L225 Difference]: With dead ends: 7963 [2018-12-09 13:29:33,141 INFO L226 Difference]: Without dead ends: 7961 [2018-12-09 13:29:33,143 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-12-09 13:29:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2018-12-09 13:29:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 4148. [2018-12-09 13:29:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4148 states. [2018-12-09 13:29:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4148 states to 4148 states and 4844 transitions. [2018-12-09 13:29:33,213 INFO L78 Accepts]: Start accepts. Automaton has 4148 states and 4844 transitions. Word has length 230 [2018-12-09 13:29:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:33,213 INFO L480 AbstractCegarLoop]: Abstraction has 4148 states and 4844 transitions. [2018-12-09 13:29:33,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-09 13:29:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4148 states and 4844 transitions. [2018-12-09 13:29:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-12-09 13:29:33,214 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:33,215 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:33,215 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:33,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -636089411, now seen corresponding path program 38 times [2018-12-09 13:29:33,215 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:33,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:33,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:33,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:33,216 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 4332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:33,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:33,625 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:33,625 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:33,626 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:33,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:33,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:33,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:33,631 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:33,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-12-09 13:29:33,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:33,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 4332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:33,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 4332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:34,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:34,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 79 [2018-12-09 13:29:34,782 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:34,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-09 13:29:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-09 13:29:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-12-09 13:29:34,783 INFO L87 Difference]: Start difference. First operand 4148 states and 4844 transitions. Second operand 41 states. [2018-12-09 13:29:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:34,986 INFO L93 Difference]: Finished difference Result 8258 states and 10309 transitions. [2018-12-09 13:29:34,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-09 13:29:34,987 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 236 [2018-12-09 13:29:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:34,991 INFO L225 Difference]: With dead ends: 8258 [2018-12-09 13:29:34,991 INFO L226 Difference]: Without dead ends: 8256 [2018-12-09 13:29:34,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-12-09 13:29:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8256 states. [2018-12-09 13:29:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8256 to 4295. [2018-12-09 13:29:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4295 states. [2018-12-09 13:29:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 5016 transitions. [2018-12-09 13:29:35,065 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 5016 transitions. Word has length 236 [2018-12-09 13:29:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:35,065 INFO L480 AbstractCegarLoop]: Abstraction has 4295 states and 5016 transitions. [2018-12-09 13:29:35,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-09 13:29:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 5016 transitions. [2018-12-09 13:29:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-12-09 13:29:35,067 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:35,067 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:35,067 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:35,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:35,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1127635562, now seen corresponding path program 39 times [2018-12-09 13:29:35,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:35,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:35,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:35,068 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4563 backedges. 0 proven. 4563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:35,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:35,476 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:35,476 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:35,476 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:35,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:35,476 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:35,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:35,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:35,504 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:35,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:35,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4563 backedges. 0 proven. 4563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:35,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4563 backedges. 0 proven. 4563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:36,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:36,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2018-12-09 13:29:36,627 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:36,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-09 13:29:36,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-09 13:29:36,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-12-09 13:29:36,628 INFO L87 Difference]: Start difference. First operand 4295 states and 5016 transitions. Second operand 42 states. [2018-12-09 13:29:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:36,982 INFO L93 Difference]: Finished difference Result 8553 states and 10678 transitions. [2018-12-09 13:29:36,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-09 13:29:36,982 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 242 [2018-12-09 13:29:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:36,988 INFO L225 Difference]: With dead ends: 8553 [2018-12-09 13:29:36,988 INFO L226 Difference]: Without dead ends: 8551 [2018-12-09 13:29:36,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-12-09 13:29:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2018-12-09 13:29:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 4442. [2018-12-09 13:29:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4442 states. [2018-12-09 13:29:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 5188 transitions. [2018-12-09 13:29:37,063 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 5188 transitions. Word has length 242 [2018-12-09 13:29:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:37,064 INFO L480 AbstractCegarLoop]: Abstraction has 4442 states and 5188 transitions. [2018-12-09 13:29:37,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-09 13:29:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 5188 transitions. [2018-12-09 13:29:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-12-09 13:29:37,065 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:37,065 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:37,065 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:37,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash -36783953, now seen corresponding path program 40 times [2018-12-09 13:29:37,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:37,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:37,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:37,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:37,066 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 0 proven. 4800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:37,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:37,516 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:37,516 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:37,516 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:37,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:37,516 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:37,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:37,524 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:37,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 0 proven. 4800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:37,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4800 backedges. 0 proven. 4800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:38,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:38,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2018-12-09 13:29:38,705 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:38,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-09 13:29:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-09 13:29:38,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-12-09 13:29:38,706 INFO L87 Difference]: Start difference. First operand 4442 states and 5188 transitions. Second operand 43 states. [2018-12-09 13:29:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:38,986 INFO L93 Difference]: Finished difference Result 8848 states and 11047 transitions. [2018-12-09 13:29:38,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-09 13:29:38,986 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 248 [2018-12-09 13:29:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:38,991 INFO L225 Difference]: With dead ends: 8848 [2018-12-09 13:29:38,991 INFO L226 Difference]: Without dead ends: 8846 [2018-12-09 13:29:38,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-12-09 13:29:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8846 states. [2018-12-09 13:29:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8846 to 4589. [2018-12-09 13:29:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4589 states. [2018-12-09 13:29:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 5360 transitions. [2018-12-09 13:29:39,069 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 5360 transitions. Word has length 248 [2018-12-09 13:29:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:39,069 INFO L480 AbstractCegarLoop]: Abstraction has 4589 states and 5360 transitions. [2018-12-09 13:29:39,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-09 13:29:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 5360 transitions. [2018-12-09 13:29:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-12-09 13:29:39,070 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:39,071 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:39,071 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:39,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:39,071 INFO L82 PathProgramCache]: Analyzing trace with hash -403352312, now seen corresponding path program 41 times [2018-12-09 13:29:39,071 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:39,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:39,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:39,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:39,071 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 0 proven. 5043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:39,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:39,562 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:39,562 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:39,562 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:39,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:39,562 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:39,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:39,568 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:39,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-12-09 13:29:39,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:39,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 0 proven. 5043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:39,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 0 proven. 5043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:40,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:40,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 85 [2018-12-09 13:29:40,858 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:40,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-09 13:29:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-09 13:29:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-12-09 13:29:40,859 INFO L87 Difference]: Start difference. First operand 4589 states and 5360 transitions. Second operand 44 states. [2018-12-09 13:29:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:41,134 INFO L93 Difference]: Finished difference Result 9143 states and 11416 transitions. [2018-12-09 13:29:41,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-09 13:29:41,134 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 254 [2018-12-09 13:29:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:41,139 INFO L225 Difference]: With dead ends: 9143 [2018-12-09 13:29:41,139 INFO L226 Difference]: Without dead ends: 9141 [2018-12-09 13:29:41,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-12-09 13:29:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9141 states. [2018-12-09 13:29:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9141 to 4736. [2018-12-09 13:29:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4736 states. [2018-12-09 13:29:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4736 states to 4736 states and 5532 transitions. [2018-12-09 13:29:41,220 INFO L78 Accepts]: Start accepts. Automaton has 4736 states and 5532 transitions. Word has length 254 [2018-12-09 13:29:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:41,220 INFO L480 AbstractCegarLoop]: Abstraction has 4736 states and 5532 transitions. [2018-12-09 13:29:41,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-09 13:29:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4736 states and 5532 transitions. [2018-12-09 13:29:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-12-09 13:29:41,222 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:41,222 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:41,222 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:41,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -842954079, now seen corresponding path program 42 times [2018-12-09 13:29:41,222 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:41,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:41,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:41,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:41,223 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5292 backedges. 0 proven. 5292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:41,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:41,678 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:41,678 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:41,678 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:41,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:41,678 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:41,685 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:41,685 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:41,707 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:41,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:41,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5292 backedges. 0 proven. 5292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:41,740 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5292 backedges. 0 proven. 5292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:42,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:42,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 87 [2018-12-09 13:29:42,983 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:42,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-09 13:29:42,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-09 13:29:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-12-09 13:29:42,984 INFO L87 Difference]: Start difference. First operand 4736 states and 5532 transitions. Second operand 45 states. [2018-12-09 13:29:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:43,246 INFO L93 Difference]: Finished difference Result 9438 states and 11785 transitions. [2018-12-09 13:29:43,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-09 13:29:43,247 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 260 [2018-12-09 13:29:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:43,252 INFO L225 Difference]: With dead ends: 9438 [2018-12-09 13:29:43,252 INFO L226 Difference]: Without dead ends: 9436 [2018-12-09 13:29:43,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-12-09 13:29:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9436 states. [2018-12-09 13:29:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9436 to 4883. [2018-12-09 13:29:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4883 states. [2018-12-09 13:29:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 5704 transitions. [2018-12-09 13:29:43,338 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 5704 transitions. Word has length 260 [2018-12-09 13:29:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:43,338 INFO L480 AbstractCegarLoop]: Abstraction has 4883 states and 5704 transitions. [2018-12-09 13:29:43,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-09 13:29:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 5704 transitions. [2018-12-09 13:29:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-12-09 13:29:43,340 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:43,340 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:43,340 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:43,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1919641978, now seen corresponding path program 43 times [2018-12-09 13:29:43,340 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:43,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:43,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:43,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:43,341 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5547 backedges. 0 proven. 5547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:43,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:43,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:43,843 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:43,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:43,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:43,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:43,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:43,849 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:43,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5547 backedges. 0 proven. 5547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:43,907 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5547 backedges. 0 proven. 5547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:45,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:45,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 89 [2018-12-09 13:29:45,245 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:45,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-09 13:29:45,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-09 13:29:45,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-12-09 13:29:45,246 INFO L87 Difference]: Start difference. First operand 4883 states and 5704 transitions. Second operand 46 states. [2018-12-09 13:29:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:45,489 INFO L93 Difference]: Finished difference Result 9733 states and 12154 transitions. [2018-12-09 13:29:45,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-09 13:29:45,489 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 266 [2018-12-09 13:29:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:45,494 INFO L225 Difference]: With dead ends: 9733 [2018-12-09 13:29:45,494 INFO L226 Difference]: Without dead ends: 9731 [2018-12-09 13:29:45,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-12-09 13:29:45,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9731 states. [2018-12-09 13:29:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9731 to 5030. [2018-12-09 13:29:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5030 states. [2018-12-09 13:29:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 5876 transitions. [2018-12-09 13:29:45,583 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 5876 transitions. Word has length 266 [2018-12-09 13:29:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:45,584 INFO L480 AbstractCegarLoop]: Abstraction has 5030 states and 5876 transitions. [2018-12-09 13:29:45,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-09 13:29:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 5876 transitions. [2018-12-09 13:29:45,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-12-09 13:29:45,586 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:45,586 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:45,586 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:45,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:45,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1294007917, now seen corresponding path program 44 times [2018-12-09 13:29:45,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:45,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:45,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:45,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:45,587 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5808 backedges. 0 proven. 5808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:46,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:46,129 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:46,129 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:46,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:46,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:46,129 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:46,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:46,136 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:46,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-12-09 13:29:46,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:46,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5808 backedges. 0 proven. 5808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:46,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5808 backedges. 0 proven. 5808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:47,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:47,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 91 [2018-12-09 13:29:47,630 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:47,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-09 13:29:47,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-09 13:29:47,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-12-09 13:29:47,630 INFO L87 Difference]: Start difference. First operand 5030 states and 5876 transitions. Second operand 47 states. [2018-12-09 13:29:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:47,897 INFO L93 Difference]: Finished difference Result 10028 states and 12523 transitions. [2018-12-09 13:29:47,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-09 13:29:47,898 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 272 [2018-12-09 13:29:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:47,903 INFO L225 Difference]: With dead ends: 10028 [2018-12-09 13:29:47,903 INFO L226 Difference]: Without dead ends: 10026 [2018-12-09 13:29:47,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-12-09 13:29:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10026 states. [2018-12-09 13:29:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10026 to 5177. [2018-12-09 13:29:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5177 states. [2018-12-09 13:29:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5177 states to 5177 states and 6048 transitions. [2018-12-09 13:29:47,997 INFO L78 Accepts]: Start accepts. Automaton has 5177 states and 6048 transitions. Word has length 272 [2018-12-09 13:29:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:47,997 INFO L480 AbstractCegarLoop]: Abstraction has 5177 states and 6048 transitions. [2018-12-09 13:29:47,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-09 13:29:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5177 states and 6048 transitions. [2018-12-09 13:29:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-12-09 13:29:48,000 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:48,000 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:48,001 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:48,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:48,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1857839852, now seen corresponding path program 45 times [2018-12-09 13:29:48,001 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:48,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:48,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:48,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:48,002 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6075 backedges. 0 proven. 6075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:48,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:48,553 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:48,553 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:48,553 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:48,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:48,553 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:48,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:48,562 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:48,585 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:48,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:48,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6075 backedges. 0 proven. 6075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:48,622 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6075 backedges. 0 proven. 6075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:50,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:50,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2018-12-09 13:29:50,063 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:50,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-09 13:29:50,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-09 13:29:50,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-12-09 13:29:50,064 INFO L87 Difference]: Start difference. First operand 5177 states and 6048 transitions. Second operand 48 states. [2018-12-09 13:29:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:50,350 INFO L93 Difference]: Finished difference Result 10323 states and 12892 transitions. [2018-12-09 13:29:50,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-09 13:29:50,350 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 278 [2018-12-09 13:29:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:50,355 INFO L225 Difference]: With dead ends: 10323 [2018-12-09 13:29:50,355 INFO L226 Difference]: Without dead ends: 10321 [2018-12-09 13:29:50,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-12-09 13:29:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2018-12-09 13:29:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 5324. [2018-12-09 13:29:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5324 states. [2018-12-09 13:29:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5324 states to 5324 states and 6220 transitions. [2018-12-09 13:29:50,452 INFO L78 Accepts]: Start accepts. Automaton has 5324 states and 6220 transitions. Word has length 278 [2018-12-09 13:29:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:50,452 INFO L480 AbstractCegarLoop]: Abstraction has 5324 states and 6220 transitions. [2018-12-09 13:29:50,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-09 13:29:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5324 states and 6220 transitions. [2018-12-09 13:29:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-12-09 13:29:50,454 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:50,454 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:50,454 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:50,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:50,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1319658107, now seen corresponding path program 46 times [2018-12-09 13:29:50,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:50,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:50,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:50,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:50,455 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:51,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:51,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:51,024 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:51,024 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:51,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:51,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:51,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:51,030 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:51,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:51,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6348 backedges. 0 proven. 6348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:52,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:52,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2018-12-09 13:29:52,584 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:52,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-12-09 13:29:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-12-09 13:29:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-12-09 13:29:52,585 INFO L87 Difference]: Start difference. First operand 5324 states and 6220 transitions. Second operand 49 states. [2018-12-09 13:29:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:52,866 INFO L93 Difference]: Finished difference Result 10618 states and 13261 transitions. [2018-12-09 13:29:52,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-09 13:29:52,866 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 284 [2018-12-09 13:29:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:52,872 INFO L225 Difference]: With dead ends: 10618 [2018-12-09 13:29:52,872 INFO L226 Difference]: Without dead ends: 10616 [2018-12-09 13:29:52,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-12-09 13:29:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2018-12-09 13:29:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 5471. [2018-12-09 13:29:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5471 states. [2018-12-09 13:29:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 6392 transitions. [2018-12-09 13:29:52,974 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 6392 transitions. Word has length 284 [2018-12-09 13:29:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:52,974 INFO L480 AbstractCegarLoop]: Abstraction has 5471 states and 6392 transitions. [2018-12-09 13:29:52,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-12-09 13:29:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 6392 transitions. [2018-12-09 13:29:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-12-09 13:29:52,978 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:52,978 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:52,978 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:52,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:52,978 INFO L82 PathProgramCache]: Analyzing trace with hash 448315742, now seen corresponding path program 47 times [2018-12-09 13:29:52,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:52,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:52,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:52,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:52,979 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6627 backedges. 0 proven. 6627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:53,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:53,561 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:53,562 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:53,562 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:53,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:53,562 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:53,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:29:53,568 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:29:53,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-12-09 13:29:53,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:53,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6627 backedges. 0 proven. 6627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:53,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6627 backedges. 0 proven. 6627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:55,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:55,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2018-12-09 13:29:55,241 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:55,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-09 13:29:55,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-09 13:29:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-12-09 13:29:55,242 INFO L87 Difference]: Start difference. First operand 5471 states and 6392 transitions. Second operand 50 states. [2018-12-09 13:29:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:55,647 INFO L93 Difference]: Finished difference Result 10913 states and 13630 transitions. [2018-12-09 13:29:55,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-09 13:29:55,648 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 290 [2018-12-09 13:29:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:55,654 INFO L225 Difference]: With dead ends: 10913 [2018-12-09 13:29:55,654 INFO L226 Difference]: Without dead ends: 10911 [2018-12-09 13:29:55,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-12-09 13:29:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10911 states. [2018-12-09 13:29:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10911 to 5618. [2018-12-09 13:29:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5618 states. [2018-12-09 13:29:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 6564 transitions. [2018-12-09 13:29:55,759 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 6564 transitions. Word has length 290 [2018-12-09 13:29:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:55,759 INFO L480 AbstractCegarLoop]: Abstraction has 5618 states and 6564 transitions. [2018-12-09 13:29:55,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-09 13:29:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 6564 transitions. [2018-12-09 13:29:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-12-09 13:29:55,762 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:55,762 INFO L402 BasicCegarLoop]: trace histogram [48, 47, 47, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:55,762 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:55,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:55,763 INFO L82 PathProgramCache]: Analyzing trace with hash 816104855, now seen corresponding path program 18 times [2018-12-09 13:29:55,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:55,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:55,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:55,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:55,763 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5569 backedges. 2278 proven. 1704 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2018-12-09 13:29:55,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:55,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:55,972 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:55,972 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:55,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:55,972 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:55,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:55,977 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:56,001 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:56,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:56,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5569 backedges. 2278 proven. 1704 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2018-12-09 13:29:56,032 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5569 backedges. 2278 proven. 1704 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2018-12-09 13:29:56,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:56,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2018-12-09 13:29:56,517 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:56,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-09 13:29:56,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-09 13:29:56,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 13:29:56,517 INFO L87 Difference]: Start difference. First operand 5618 states and 6564 transitions. Second operand 27 states. [2018-12-09 13:29:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:56,589 INFO L93 Difference]: Finished difference Result 11101 states and 12994 transitions. [2018-12-09 13:29:56,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-09 13:29:56,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 292 [2018-12-09 13:29:56,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:56,593 INFO L225 Difference]: With dead ends: 11101 [2018-12-09 13:29:56,593 INFO L226 Difference]: Without dead ends: 5628 [2018-12-09 13:29:56,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 13:29:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2018-12-09 13:29:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 5624. [2018-12-09 13:29:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5624 states. [2018-12-09 13:29:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5624 states to 5624 states and 6570 transitions. [2018-12-09 13:29:56,659 INFO L78 Accepts]: Start accepts. Automaton has 5624 states and 6570 transitions. Word has length 292 [2018-12-09 13:29:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:56,659 INFO L480 AbstractCegarLoop]: Abstraction has 5624 states and 6570 transitions. [2018-12-09 13:29:56,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-09 13:29:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 5624 states and 6570 transitions. [2018-12-09 13:29:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-12-09 13:29:56,662 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:56,662 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:56,662 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:56,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2003050889, now seen corresponding path program 48 times [2018-12-09 13:29:56,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:56,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:56,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:56,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:56,663 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6912 backedges. 0 proven. 6912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:57,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:57,260 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:57,260 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:57,260 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:57,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:57,260 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:57,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:29:57,268 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:29:57,293 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:29:57,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:29:57,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6912 backedges. 0 proven. 6912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:57,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:29:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6912 backedges. 0 proven. 6912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:29:58,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:29:58,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2018-12-09 13:29:58,960 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:29:58,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-09 13:29:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-09 13:29:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-12-09 13:29:58,961 INFO L87 Difference]: Start difference. First operand 5624 states and 6570 transitions. Second operand 51 states. [2018-12-09 13:29:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:29:59,259 INFO L93 Difference]: Finished difference Result 11214 states and 14005 transitions. [2018-12-09 13:29:59,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-09 13:29:59,259 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 296 [2018-12-09 13:29:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:29:59,265 INFO L225 Difference]: With dead ends: 11214 [2018-12-09 13:29:59,265 INFO L226 Difference]: Without dead ends: 11212 [2018-12-09 13:29:59,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-12-09 13:29:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2018-12-09 13:29:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 5771. [2018-12-09 13:29:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5771 states. [2018-12-09 13:29:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 6742 transitions. [2018-12-09 13:29:59,372 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 6742 transitions. Word has length 296 [2018-12-09 13:29:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:29:59,372 INFO L480 AbstractCegarLoop]: Abstraction has 5771 states and 6742 transitions. [2018-12-09 13:29:59,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-09 13:29:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 6742 transitions. [2018-12-09 13:29:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-12-09 13:29:59,375 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:29:59,375 INFO L402 BasicCegarLoop]: trace histogram [49, 48, 48, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-12-09 13:29:59,375 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:29:59,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:29:59,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1305149328, now seen corresponding path program 19 times [2018-12-09 13:29:59,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:29:59,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:59,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:29:59,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:29:59,376 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:29:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5808 backedges. 2371 proven. 1850 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2018-12-09 13:29:59,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:59,594 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:29:59,595 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:29:59,595 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:29:59,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:29:59,595 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:29:59,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:29:59,603 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:29:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:29:59,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:29:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5808 backedges. 2371 proven. 1850 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2018-12-09 13:29:59,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5808 backedges. 2371 proven. 1850 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2018-12-09 13:30:00,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:00,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 53 [2018-12-09 13:30:00,165 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:00,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-09 13:30:00,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-09 13:30:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:00,165 INFO L87 Difference]: Start difference. First operand 5771 states and 6742 transitions. Second operand 28 states. [2018-12-09 13:30:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:00,247 INFO L93 Difference]: Finished difference Result 11401 states and 13344 transitions. [2018-12-09 13:30:00,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-09 13:30:00,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 298 [2018-12-09 13:30:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:00,251 INFO L225 Difference]: With dead ends: 11401 [2018-12-09 13:30:00,251 INFO L226 Difference]: Without dead ends: 5781 [2018-12-09 13:30:00,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 571 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2018-12-09 13:30:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 5777. [2018-12-09 13:30:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5777 states. [2018-12-09 13:30:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 6748 transitions. [2018-12-09 13:30:00,318 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 6748 transitions. Word has length 298 [2018-12-09 13:30:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:00,318 INFO L480 AbstractCegarLoop]: Abstraction has 5777 states and 6748 transitions. [2018-12-09 13:30:00,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-09 13:30:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 6748 transitions. [2018-12-09 13:30:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-12-09 13:30:00,321 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:00,321 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:00,321 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:00,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash -9370416, now seen corresponding path program 49 times [2018-12-09 13:30:00,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:00,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:00,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:00,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:00,322 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7203 backedges. 0 proven. 7203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:00,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:00,956 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:00,956 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:00,956 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:00,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:00,956 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:00,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:00,964 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:00,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7203 backedges. 0 proven. 7203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:01,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7203 backedges. 0 proven. 7203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:02,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:02,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2018-12-09 13:30:02,725 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:02,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-09 13:30:02,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-09 13:30:02,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-09 13:30:02,726 INFO L87 Difference]: Start difference. First operand 5777 states and 6748 transitions. Second operand 52 states. [2018-12-09 13:30:03,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:03,037 INFO L93 Difference]: Finished difference Result 11515 states and 14380 transitions. [2018-12-09 13:30:03,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-09 13:30:03,038 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 302 [2018-12-09 13:30:03,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:03,044 INFO L225 Difference]: With dead ends: 11515 [2018-12-09 13:30:03,044 INFO L226 Difference]: Without dead ends: 11513 [2018-12-09 13:30:03,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-12-09 13:30:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11513 states. [2018-12-09 13:30:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11513 to 5924. [2018-12-09 13:30:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5924 states. [2018-12-09 13:30:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 6920 transitions. [2018-12-09 13:30:03,154 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 6920 transitions. Word has length 302 [2018-12-09 13:30:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:03,155 INFO L480 AbstractCegarLoop]: Abstraction has 5924 states and 6920 transitions. [2018-12-09 13:30:03,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-09 13:30:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 6920 transitions. [2018-12-09 13:30:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-12-09 13:30:03,159 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:03,159 INFO L402 BasicCegarLoop]: trace histogram [50, 49, 49, 26, 26, 26, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:03,159 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:03,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash -933628791, now seen corresponding path program 20 times [2018-12-09 13:30:03,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:03,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:03,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:03,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:03,160 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2464 proven. 2002 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2018-12-09 13:30:03,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:03,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:03,390 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:03,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:03,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:03,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:03,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:30:03,399 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:30:03,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-12-09 13:30:03,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:03,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2570 proven. 1779 refuted. 0 times theorem prover too weak. 1704 trivial. 0 not checked. [2018-12-09 13:30:03,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2570 proven. 1779 refuted. 0 times theorem prover too weak. 1704 trivial. 0 not checked. [2018-12-09 13:30:04,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:04,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 81 [2018-12-09 13:30:04,746 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:04,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-12-09 13:30:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-12-09 13:30:04,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-12-09 13:30:04,747 INFO L87 Difference]: Start difference. First operand 5924 states and 6920 transitions. Second operand 55 states. [2018-12-09 13:30:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:04,999 INFO L93 Difference]: Finished difference Result 12065 states and 14140 transitions. [2018-12-09 13:30:05,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-09 13:30:05,000 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 304 [2018-12-09 13:30:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:05,003 INFO L225 Difference]: With dead ends: 12065 [2018-12-09 13:30:05,003 INFO L226 Difference]: Without dead ends: 6298 [2018-12-09 13:30:05,007 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-12-09 13:30:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2018-12-09 13:30:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 6248. [2018-12-09 13:30:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6248 states. [2018-12-09 13:30:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 7297 transitions. [2018-12-09 13:30:05,083 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 7297 transitions. Word has length 304 [2018-12-09 13:30:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:05,083 INFO L480 AbstractCegarLoop]: Abstraction has 6248 states and 7297 transitions. [2018-12-09 13:30:05,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-12-09 13:30:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 7297 transitions. [2018-12-09 13:30:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-12-09 13:30:05,085 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:05,085 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:05,085 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:05,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:05,085 INFO L82 PathProgramCache]: Analyzing trace with hash -748927895, now seen corresponding path program 50 times [2018-12-09 13:30:05,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:05,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:05,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:05,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:05,086 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:05,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:05,727 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:05,727 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:05,727 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:05,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:05,727 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:05,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:30:05,735 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:30:05,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-12-09 13:30:05,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:05,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:05,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:07,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:07,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 103 [2018-12-09 13:30:07,598 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:07,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-09 13:30:07,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-09 13:30:07,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-12-09 13:30:07,599 INFO L87 Difference]: Start difference. First operand 6248 states and 7297 transitions. Second operand 53 states. [2018-12-09 13:30:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:07,999 INFO L93 Difference]: Finished difference Result 12452 states and 15550 transitions. [2018-12-09 13:30:08,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-09 13:30:08,000 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 308 [2018-12-09 13:30:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:08,006 INFO L225 Difference]: With dead ends: 12452 [2018-12-09 13:30:08,006 INFO L226 Difference]: Without dead ends: 12450 [2018-12-09 13:30:08,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-12-09 13:30:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12450 states. [2018-12-09 13:30:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12450 to 6407. [2018-12-09 13:30:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6407 states. [2018-12-09 13:30:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 7483 transitions. [2018-12-09 13:30:08,130 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 7483 transitions. Word has length 308 [2018-12-09 13:30:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:08,130 INFO L480 AbstractCegarLoop]: Abstraction has 6407 states and 7483 transitions. [2018-12-09 13:30:08,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-09 13:30:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 7483 transitions. [2018-12-09 13:30:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-12-09 13:30:08,132 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:08,132 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:08,133 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:08,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:08,133 INFO L82 PathProgramCache]: Analyzing trace with hash 288730434, now seen corresponding path program 51 times [2018-12-09 13:30:08,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:08,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:08,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:08,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:08,133 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7803 backedges. 0 proven. 7803 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:08,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:08,786 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:08,787 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:08,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:08,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:08,787 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:08,792 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:30:08,793 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:30:08,818 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:30:08,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:08,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7803 backedges. 0 proven. 7803 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:08,865 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7803 backedges. 0 proven. 7803 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:10,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:10,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2018-12-09 13:30:10,697 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:10,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-09 13:30:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-09 13:30:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-12-09 13:30:10,698 INFO L87 Difference]: Start difference. First operand 6407 states and 7483 transitions. Second operand 54 states. [2018-12-09 13:30:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:11,397 INFO L93 Difference]: Finished difference Result 12771 states and 15949 transitions. [2018-12-09 13:30:11,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-09 13:30:11,397 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 314 [2018-12-09 13:30:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:11,404 INFO L225 Difference]: With dead ends: 12771 [2018-12-09 13:30:11,404 INFO L226 Difference]: Without dead ends: 12769 [2018-12-09 13:30:11,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-12-09 13:30:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12769 states. [2018-12-09 13:30:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12769 to 6566. [2018-12-09 13:30:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6566 states. [2018-12-09 13:30:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6566 states to 6566 states and 7669 transitions. [2018-12-09 13:30:11,536 INFO L78 Accepts]: Start accepts. Automaton has 6566 states and 7669 transitions. Word has length 314 [2018-12-09 13:30:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:11,536 INFO L480 AbstractCegarLoop]: Abstraction has 6566 states and 7669 transitions. [2018-12-09 13:30:11,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-09 13:30:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6566 states and 7669 transitions. [2018-12-09 13:30:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-12-09 13:30:11,538 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:11,538 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:11,538 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:11,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash 663310171, now seen corresponding path program 52 times [2018-12-09 13:30:11,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:11,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:11,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:11,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:11,539 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8112 backedges. 0 proven. 8112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:12,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:12,246 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:12,246 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:12,246 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:12,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:12,246 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:12,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:12,252 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:12,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8112 backedges. 8111 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 13:30:13,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8112 backedges. 8111 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 13:30:14,982 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 13:30:14,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [54, 54] imperfect sequences [54] total 107 [2018-12-09 13:30:14,983 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 13:30:14,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-09 13:30:14,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-09 13:30:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-12-09 13:30:14,983 INFO L87 Difference]: Start difference. First operand 6566 states and 7669 transitions. Second operand 54 states. [2018-12-09 13:30:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:15,217 INFO L93 Difference]: Finished difference Result 10398 states and 12153 transitions. [2018-12-09 13:30:15,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-09 13:30:15,217 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 320 [2018-12-09 13:30:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:15,221 INFO L225 Difference]: With dead ends: 10398 [2018-12-09 13:30:15,221 INFO L226 Difference]: Without dead ends: 4001 [2018-12-09 13:30:15,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 536 SyntacticMatches, 52 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6734 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2915, Invalid=8427, Unknown=0, NotChecked=0, Total=11342 [2018-12-09 13:30:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2018-12-09 13:30:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 467. [2018-12-09 13:30:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2018-12-09 13:30:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 490 transitions. [2018-12-09 13:30:15,245 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 490 transitions. Word has length 320 [2018-12-09 13:30:15,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:15,245 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 490 transitions. [2018-12-09 13:30:15,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-09 13:30:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 490 transitions. [2018-12-09 13:30:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-12-09 13:30:15,246 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:15,246 INFO L402 BasicCegarLoop]: trace histogram [54, 53, 53, 28, 28, 28, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:15,246 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:15,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:15,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1331083489, now seen corresponding path program 21 times [2018-12-09 13:30:15,246 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:15,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:15,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:15,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:15,247 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7077 backedges. 2878 proven. 2324 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2018-12-09 13:30:15,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:15,515 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:15,515 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:15,515 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:15,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:15,515 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:15,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:30:15,521 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:30:15,548 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:30:15,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:15,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7077 backedges. 2878 proven. 2324 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2018-12-09 13:30:15,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7077 backedges. 2878 proven. 2324 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2018-12-09 13:30:16,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:16,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2018-12-09 13:30:16,139 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:16,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-09 13:30:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-09 13:30:16,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:16,140 INFO L87 Difference]: Start difference. First operand 467 states and 490 transitions. Second operand 31 states. [2018-12-09 13:30:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:16,215 INFO L93 Difference]: Finished difference Result 621 states and 644 transitions. [2018-12-09 13:30:16,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-09 13:30:16,215 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 328 [2018-12-09 13:30:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:16,216 INFO L225 Difference]: With dead ends: 621 [2018-12-09 13:30:16,216 INFO L226 Difference]: Without dead ends: 467 [2018-12-09 13:30:16,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 628 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2018-12-09 13:30:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2018-12-09 13:30:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2018-12-09 13:30:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 489 transitions. [2018-12-09 13:30:16,226 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 489 transitions. Word has length 328 [2018-12-09 13:30:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:16,226 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 489 transitions. [2018-12-09 13:30:16,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-09 13:30:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 489 transitions. [2018-12-09 13:30:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-12-09 13:30:16,227 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:16,227 INFO L402 BasicCegarLoop]: trace histogram [55, 54, 54, 29, 29, 29, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:16,227 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:16,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:16,227 INFO L82 PathProgramCache]: Analyzing trace with hash -132891846, now seen corresponding path program 22 times [2018-12-09 13:30:16,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:16,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:16,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:16,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:16,228 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7348 backedges. 2979 proven. 2494 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2018-12-09 13:30:16,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:16,500 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:16,500 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:16,500 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:16,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:16,500 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:16,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:16,506 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:16,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7348 backedges. 2979 proven. 2494 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2018-12-09 13:30:16,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7348 backedges. 2979 proven. 2494 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2018-12-09 13:30:17,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:17,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2018-12-09 13:30:17,129 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:17,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-09 13:30:17,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-09 13:30:17,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:17,130 INFO L87 Difference]: Start difference. First operand 467 states and 489 transitions. Second operand 32 states. [2018-12-09 13:30:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:17,207 INFO L93 Difference]: Finished difference Result 621 states and 643 transitions. [2018-12-09 13:30:17,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-09 13:30:17,207 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 334 [2018-12-09 13:30:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:17,207 INFO L225 Difference]: With dead ends: 621 [2018-12-09 13:30:17,207 INFO L226 Difference]: Without dead ends: 467 [2018-12-09 13:30:17,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 639 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2018-12-09 13:30:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2018-12-09 13:30:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2018-12-09 13:30:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 488 transitions. [2018-12-09 13:30:17,217 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 488 transitions. Word has length 334 [2018-12-09 13:30:17,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:17,217 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 488 transitions. [2018-12-09 13:30:17,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-09 13:30:17,217 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 488 transitions. [2018-12-09 13:30:17,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-12-09 13:30:17,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:17,218 INFO L402 BasicCegarLoop]: trace histogram [56, 55, 55, 30, 30, 30, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:17,218 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:17,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1389177133, now seen corresponding path program 23 times [2018-12-09 13:30:17,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:17,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:17,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:17,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:17,219 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7625 backedges. 3080 proven. 2670 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2018-12-09 13:30:17,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:17,495 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:17,495 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:17,495 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:17,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:17,495 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:17,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:30:17,501 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:30:17,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-12-09 13:30:17,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:17,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7625 backedges. 3218 proven. 2083 refuted. 0 times theorem prover too weak. 2324 trivial. 0 not checked. [2018-12-09 13:30:18,138 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7625 backedges. 3218 proven. 2083 refuted. 0 times theorem prover too weak. 2324 trivial. 0 not checked. [2018-12-09 13:30:19,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:19,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 29] total 89 [2018-12-09 13:30:19,082 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:19,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-12-09 13:30:19,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-12-09 13:30:19,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-12-09 13:30:19,083 INFO L87 Difference]: Start difference. First operand 467 states and 488 transitions. Second operand 61 states. [2018-12-09 13:30:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:19,273 INFO L93 Difference]: Finished difference Result 634 states and 657 transitions. [2018-12-09 13:30:19,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-09 13:30:19,273 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 340 [2018-12-09 13:30:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:19,274 INFO L225 Difference]: With dead ends: 634 [2018-12-09 13:30:19,274 INFO L226 Difference]: Without dead ends: 480 [2018-12-09 13:30:19,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-12-09 13:30:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2018-12-09 13:30:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 479. [2018-12-09 13:30:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-09 13:30:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 498 transitions. [2018-12-09 13:30:19,288 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 498 transitions. Word has length 340 [2018-12-09 13:30:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:19,288 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 498 transitions. [2018-12-09 13:30:19,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-12-09 13:30:19,288 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 498 transitions. [2018-12-09 13:30:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-12-09 13:30:19,289 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:19,289 INFO L402 BasicCegarLoop]: trace histogram [60, 59, 59, 32, 32, 32, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:19,289 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:19,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:19,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1714001109, now seen corresponding path program 24 times [2018-12-09 13:30:19,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:19,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:19,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:19,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:19,290 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8769 backedges. 3542 proven. 3040 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2018-12-09 13:30:19,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:19,614 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:19,614 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:19,614 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:19,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:19,614 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:19,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:30:19,620 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:30:19,649 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:30:19,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:19,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8769 backedges. 3542 proven. 3040 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2018-12-09 13:30:19,697 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8769 backedges. 3542 proven. 3040 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2018-12-09 13:30:20,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:20,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2018-12-09 13:30:20,288 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:20,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-09 13:30:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-09 13:30:20,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:20,289 INFO L87 Difference]: Start difference. First operand 479 states and 498 transitions. Second operand 35 states. [2018-12-09 13:30:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:20,370 INFO L93 Difference]: Finished difference Result 645 states and 664 transitions. [2018-12-09 13:30:20,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-09 13:30:20,371 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 364 [2018-12-09 13:30:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:20,371 INFO L225 Difference]: With dead ends: 645 [2018-12-09 13:30:20,371 INFO L226 Difference]: Without dead ends: 479 [2018-12-09 13:30:20,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 696 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-12-09 13:30:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-12-09 13:30:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-09 13:30:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 497 transitions. [2018-12-09 13:30:20,382 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 497 transitions. Word has length 364 [2018-12-09 13:30:20,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:20,382 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 497 transitions. [2018-12-09 13:30:20,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-09 13:30:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 497 transitions. [2018-12-09 13:30:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-12-09 13:30:20,383 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:20,383 INFO L402 BasicCegarLoop]: trace histogram [61, 60, 60, 33, 33, 33, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:20,383 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:20,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:20,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1993569540, now seen corresponding path program 25 times [2018-12-09 13:30:20,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:20,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:20,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:20,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:20,384 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 3651 proven. 3234 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2018-12-09 13:30:20,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:20,720 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:20,720 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:20,720 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:20,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:20,721 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:20,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:20,726 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:20,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 3651 proven. 3234 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2018-12-09 13:30:20,804 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 3651 proven. 3234 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2018-12-09 13:30:21,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:21,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 53 [2018-12-09 13:30:21,399 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:21,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-09 13:30:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-09 13:30:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:21,400 INFO L87 Difference]: Start difference. First operand 479 states and 497 transitions. Second operand 36 states. [2018-12-09 13:30:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:21,474 INFO L93 Difference]: Finished difference Result 645 states and 663 transitions. [2018-12-09 13:30:21,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-09 13:30:21,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 370 [2018-12-09 13:30:21,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:21,474 INFO L225 Difference]: With dead ends: 645 [2018-12-09 13:30:21,474 INFO L226 Difference]: Without dead ends: 479 [2018-12-09 13:30:21,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 707 SyntacticMatches, 17 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-12-09 13:30:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-12-09 13:30:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-09 13:30:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 496 transitions. [2018-12-09 13:30:21,485 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 496 transitions. Word has length 370 [2018-12-09 13:30:21,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:21,485 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 496 transitions. [2018-12-09 13:30:21,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-09 13:30:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 496 transitions. [2018-12-09 13:30:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-12-09 13:30:21,486 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:21,492 INFO L402 BasicCegarLoop]: trace histogram [62, 61, 61, 34, 34, 34, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:21,492 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:21,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:21,492 INFO L82 PathProgramCache]: Analyzing trace with hash -783419363, now seen corresponding path program 26 times [2018-12-09 13:30:21,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:21,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:21,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:21,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:21,493 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9381 backedges. 3760 proven. 3434 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2018-12-09 13:30:21,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:21,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:21,854 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:21,854 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:21,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:21,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:21,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:30:21,860 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:30:21,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-12-09 13:30:21,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:21,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9381 backedges. 3930 proven. 2411 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-12-09 13:30:22,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9381 backedges. 3930 proven. 2411 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-12-09 13:30:23,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:23,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 31, 31] total 97 [2018-12-09 13:30:23,715 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:23,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-12-09 13:30:23,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-12-09 13:30:23,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-12-09 13:30:23,716 INFO L87 Difference]: Start difference. First operand 479 states and 496 transitions. Second operand 67 states. [2018-12-09 13:30:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:23,927 INFO L93 Difference]: Finished difference Result 658 states and 677 transitions. [2018-12-09 13:30:23,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-09 13:30:23,928 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 376 [2018-12-09 13:30:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:23,928 INFO L225 Difference]: With dead ends: 658 [2018-12-09 13:30:23,928 INFO L226 Difference]: Without dead ends: 492 [2018-12-09 13:30:23,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-12-09 13:30:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2018-12-09 13:30:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 491. [2018-12-09 13:30:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2018-12-09 13:30:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 506 transitions. [2018-12-09 13:30:23,939 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 506 transitions. Word has length 376 [2018-12-09 13:30:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:23,940 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 506 transitions. [2018-12-09 13:30:23,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-12-09 13:30:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 506 transitions. [2018-12-09 13:30:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-12-09 13:30:23,941 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:23,941 INFO L402 BasicCegarLoop]: trace histogram [66, 65, 65, 36, 36, 36, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:23,941 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:23,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1389994891, now seen corresponding path program 27 times [2018-12-09 13:30:23,941 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:23,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:23,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:23,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:23,942 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10645 backedges. 4270 proven. 3852 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2018-12-09 13:30:24,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:24,340 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:24,341 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:24,341 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:24,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:24,341 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:24,347 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:30:24,347 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:30:24,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:30:24,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:24,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10645 backedges. 4270 proven. 3852 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2018-12-09 13:30:24,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10645 backedges. 4270 proven. 3852 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2018-12-09 13:30:25,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:25,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 53 [2018-12-09 13:30:25,064 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:25,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-09 13:30:25,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-09 13:30:25,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:25,065 INFO L87 Difference]: Start difference. First operand 491 states and 506 transitions. Second operand 39 states. [2018-12-09 13:30:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:25,152 INFO L93 Difference]: Finished difference Result 669 states and 684 transitions. [2018-12-09 13:30:25,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-09 13:30:25,152 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 400 [2018-12-09 13:30:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:25,152 INFO L225 Difference]: With dead ends: 669 [2018-12-09 13:30:25,152 INFO L226 Difference]: Without dead ends: 491 [2018-12-09 13:30:25,153 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 764 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2018-12-09 13:30:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2018-12-09 13:30:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2018-12-09 13:30:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 505 transitions. [2018-12-09 13:30:25,163 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 505 transitions. Word has length 400 [2018-12-09 13:30:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:25,163 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 505 transitions. [2018-12-09 13:30:25,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-09 13:30:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 505 transitions. [2018-12-09 13:30:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-12-09 13:30:25,164 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:25,164 INFO L402 BasicCegarLoop]: trace histogram [67, 66, 66, 37, 37, 37, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:25,164 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:25,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash 525675982, now seen corresponding path program 28 times [2018-12-09 13:30:25,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:25,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:25,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:25,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:25,165 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10980 backedges. 4387 proven. 4070 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2018-12-09 13:30:25,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:25,580 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:25,581 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:25,581 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:25,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:25,581 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:25,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:25,587 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:25,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10980 backedges. 4387 proven. 4070 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2018-12-09 13:30:25,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10980 backedges. 4387 proven. 4070 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2018-12-09 13:30:26,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:26,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 53 [2018-12-09 13:30:26,310 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:26,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-09 13:30:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-09 13:30:26,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:26,311 INFO L87 Difference]: Start difference. First operand 491 states and 505 transitions. Second operand 40 states. [2018-12-09 13:30:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:26,397 INFO L93 Difference]: Finished difference Result 669 states and 683 transitions. [2018-12-09 13:30:26,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-09 13:30:26,397 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 406 [2018-12-09 13:30:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:26,397 INFO L225 Difference]: With dead ends: 669 [2018-12-09 13:30:26,397 INFO L226 Difference]: Without dead ends: 491 [2018-12-09 13:30:26,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 775 SyntacticMatches, 25 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2018-12-09 13:30:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 491. [2018-12-09 13:30:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2018-12-09 13:30:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 504 transitions. [2018-12-09 13:30:26,408 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 504 transitions. Word has length 406 [2018-12-09 13:30:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:26,409 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 504 transitions. [2018-12-09 13:30:26,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-09 13:30:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 504 transitions. [2018-12-09 13:30:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-12-09 13:30:26,410 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:26,410 INFO L402 BasicCegarLoop]: trace histogram [68, 67, 67, 38, 38, 38, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:26,410 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:26,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:26,410 INFO L82 PathProgramCache]: Analyzing trace with hash 292411495, now seen corresponding path program 29 times [2018-12-09 13:30:26,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:26,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:26,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:26,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:26,411 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11321 backedges. 4504 proven. 4294 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2018-12-09 13:30:26,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:26,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:26,841 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:26,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:26,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:26,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:26,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:30:26,847 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:30:26,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-12-09 13:30:26,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:26,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11321 backedges. 4706 proven. 2763 refuted. 0 times theorem prover too weak. 3852 trivial. 0 not checked. [2018-12-09 13:30:27,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11321 backedges. 4706 proven. 2763 refuted. 0 times theorem prover too weak. 3852 trivial. 0 not checked. [2018-12-09 13:30:29,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:29,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 33, 33] total 105 [2018-12-09 13:30:29,018 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:29,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-12-09 13:30:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-12-09 13:30:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-12-09 13:30:29,020 INFO L87 Difference]: Start difference. First operand 491 states and 504 transitions. Second operand 73 states. [2018-12-09 13:30:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:29,316 INFO L93 Difference]: Finished difference Result 682 states and 697 transitions. [2018-12-09 13:30:29,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-09 13:30:29,317 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 412 [2018-12-09 13:30:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:29,317 INFO L225 Difference]: With dead ends: 682 [2018-12-09 13:30:29,317 INFO L226 Difference]: Without dead ends: 504 [2018-12-09 13:30:29,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-12-09 13:30:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2018-12-09 13:30:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 503. [2018-12-09 13:30:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2018-12-09 13:30:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 514 transitions. [2018-12-09 13:30:29,333 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 514 transitions. Word has length 412 [2018-12-09 13:30:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:29,334 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 514 transitions. [2018-12-09 13:30:29,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-12-09 13:30:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 514 transitions. [2018-12-09 13:30:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-12-09 13:30:29,335 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:29,335 INFO L402 BasicCegarLoop]: trace histogram [72, 71, 71, 40, 40, 40, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:29,335 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:29,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash -704049985, now seen corresponding path program 30 times [2018-12-09 13:30:29,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:29,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:29,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:29,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:29,336 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12705 backedges. 5062 proven. 4760 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-12-09 13:30:29,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:29,818 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:29,818 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:29,818 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:29,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:29,818 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:29,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:30:29,824 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:30:29,859 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:30:29,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:29,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12705 backedges. 5062 proven. 4760 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-12-09 13:30:29,930 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12705 backedges. 5062 proven. 4760 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-12-09 13:30:30,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:30,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 53 [2018-12-09 13:30:30,599 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:30,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-09 13:30:30,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-09 13:30:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:30,600 INFO L87 Difference]: Start difference. First operand 503 states and 514 transitions. Second operand 43 states. [2018-12-09 13:30:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:30,704 INFO L93 Difference]: Finished difference Result 693 states and 704 transitions. [2018-12-09 13:30:30,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-09 13:30:30,704 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 436 [2018-12-09 13:30:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:30,705 INFO L225 Difference]: With dead ends: 693 [2018-12-09 13:30:30,705 INFO L226 Difference]: Without dead ends: 503 [2018-12-09 13:30:30,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 832 SyntacticMatches, 31 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2018-12-09 13:30:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2018-12-09 13:30:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2018-12-09 13:30:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 513 transitions. [2018-12-09 13:30:30,722 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 513 transitions. Word has length 436 [2018-12-09 13:30:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:30,722 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 513 transitions. [2018-12-09 13:30:30,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-09 13:30:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 513 transitions. [2018-12-09 13:30:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-12-09 13:30:30,724 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:30,724 INFO L402 BasicCegarLoop]: trace histogram [73, 72, 72, 41, 41, 41, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:30,724 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:30,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:30,724 INFO L82 PathProgramCache]: Analyzing trace with hash 574350744, now seen corresponding path program 31 times [2018-12-09 13:30:30,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:30,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:30,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:30,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:30,725 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13072 backedges. 5187 proven. 5002 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-12-09 13:30:31,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:31,212 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:31,212 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:31,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:31,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:31,212 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:31,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:31,218 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:31,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13072 backedges. 5187 proven. 5002 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-12-09 13:30:31,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13072 backedges. 5187 proven. 5002 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-12-09 13:30:31,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:31,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 53 [2018-12-09 13:30:31,993 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:31,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-09 13:30:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-09 13:30:31,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:31,994 INFO L87 Difference]: Start difference. First operand 503 states and 513 transitions. Second operand 44 states. [2018-12-09 13:30:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:32,094 INFO L93 Difference]: Finished difference Result 693 states and 703 transitions. [2018-12-09 13:30:32,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-09 13:30:32,094 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 442 [2018-12-09 13:30:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:32,095 INFO L225 Difference]: With dead ends: 693 [2018-12-09 13:30:32,095 INFO L226 Difference]: Without dead ends: 503 [2018-12-09 13:30:32,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 843 SyntacticMatches, 33 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2018-12-09 13:30:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2018-12-09 13:30:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2018-12-09 13:30:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 512 transitions. [2018-12-09 13:30:32,110 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 512 transitions. Word has length 442 [2018-12-09 13:30:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:32,111 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 512 transitions. [2018-12-09 13:30:32,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-09 13:30:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 512 transitions. [2018-12-09 13:30:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-12-09 13:30:32,112 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:32,113 INFO L402 BasicCegarLoop]: trace histogram [74, 73, 73, 42, 42, 42, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:32,113 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:32,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash 437581745, now seen corresponding path program 32 times [2018-12-09 13:30:32,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:32,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:32,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:32,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:32,114 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13445 backedges. 5312 proven. 5250 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2018-12-09 13:30:32,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:32,628 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:32,628 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:32,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:32,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:32,629 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:32,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:30:32,635 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:30:32,691 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-12-09 13:30:32,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:32,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13445 backedges. 5546 proven. 3139 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2018-12-09 13:30:33,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13445 backedges. 5546 proven. 3139 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2018-12-09 13:30:35,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:35,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 35, 35] total 113 [2018-12-09 13:30:35,104 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:35,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-12-09 13:30:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-12-09 13:30:35,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-12-09 13:30:35,105 INFO L87 Difference]: Start difference. First operand 503 states and 512 transitions. Second operand 79 states. [2018-12-09 13:30:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:35,384 INFO L93 Difference]: Finished difference Result 706 states and 717 transitions. [2018-12-09 13:30:35,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-09 13:30:35,384 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 448 [2018-12-09 13:30:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:35,384 INFO L225 Difference]: With dead ends: 706 [2018-12-09 13:30:35,384 INFO L226 Difference]: Without dead ends: 516 [2018-12-09 13:30:35,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 829 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-12-09 13:30:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2018-12-09 13:30:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 515. [2018-12-09 13:30:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-12-09 13:30:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 522 transitions. [2018-12-09 13:30:35,401 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 522 transitions. Word has length 448 [2018-12-09 13:30:35,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:35,401 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 522 transitions. [2018-12-09 13:30:35,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-12-09 13:30:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 522 transitions. [2018-12-09 13:30:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2018-12-09 13:30:35,402 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:35,402 INFO L402 BasicCegarLoop]: trace histogram [78, 77, 77, 44, 44, 44, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:35,403 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:35,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1325335543, now seen corresponding path program 33 times [2018-12-09 13:30:35,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:35,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:35,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:35,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:35,403 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14949 backedges. 5918 proven. 5764 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2018-12-09 13:30:35,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:35,962 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:35,962 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:35,962 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:35,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:35,962 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:35,968 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:30:35,968 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:30:36,006 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:30:36,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:36,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 14949 backedges. 5918 proven. 5764 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2018-12-09 13:30:36,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14949 backedges. 5918 proven. 5764 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2018-12-09 13:30:36,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:36,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 53 [2018-12-09 13:30:36,777 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:36,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-09 13:30:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-09 13:30:36,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:36,778 INFO L87 Difference]: Start difference. First operand 515 states and 522 transitions. Second operand 47 states. [2018-12-09 13:30:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:36,875 INFO L93 Difference]: Finished difference Result 717 states and 724 transitions. [2018-12-09 13:30:36,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-09 13:30:36,876 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 472 [2018-12-09 13:30:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:36,876 INFO L225 Difference]: With dead ends: 717 [2018-12-09 13:30:36,876 INFO L226 Difference]: Without dead ends: 515 [2018-12-09 13:30:36,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 900 SyntacticMatches, 39 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-12-09 13:30:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2018-12-09 13:30:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-12-09 13:30:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 521 transitions. [2018-12-09 13:30:36,888 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 521 transitions. Word has length 472 [2018-12-09 13:30:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:36,888 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 521 transitions. [2018-12-09 13:30:36,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-09 13:30:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 521 transitions. [2018-12-09 13:30:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-12-09 13:30:36,889 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:36,890 INFO L402 BasicCegarLoop]: trace histogram [79, 78, 78, 45, 45, 45, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:36,890 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:36,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:36,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1880482718, now seen corresponding path program 34 times [2018-12-09 13:30:36,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:36,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:36,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:36,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:36,890 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15348 backedges. 6051 proven. 6030 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2018-12-09 13:30:37,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:37,484 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:37,484 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:37,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:37,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:37,484 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:37,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:37,490 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:37,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 15348 backedges. 6051 proven. 6030 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2018-12-09 13:30:37,610 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15348 backedges. 6051 proven. 6030 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2018-12-09 13:30:38,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:38,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 53 [2018-12-09 13:30:38,291 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:38,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-09 13:30:38,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-09 13:30:38,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:38,291 INFO L87 Difference]: Start difference. First operand 515 states and 521 transitions. Second operand 48 states. [2018-12-09 13:30:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:38,392 INFO L93 Difference]: Finished difference Result 717 states and 723 transitions. [2018-12-09 13:30:38,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-09 13:30:38,392 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 478 [2018-12-09 13:30:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:38,393 INFO L225 Difference]: With dead ends: 717 [2018-12-09 13:30:38,393 INFO L226 Difference]: Without dead ends: 515 [2018-12-09 13:30:38,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 911 SyntacticMatches, 41 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-12-09 13:30:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2018-12-09 13:30:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-12-09 13:30:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 520 transitions. [2018-12-09 13:30:38,405 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 520 transitions. Word has length 478 [2018-12-09 13:30:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:38,405 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 520 transitions. [2018-12-09 13:30:38,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-09 13:30:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 520 transitions. [2018-12-09 13:30:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2018-12-09 13:30:38,406 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:38,406 INFO L402 BasicCegarLoop]: trace histogram [80, 79, 79, 46, 46, 46, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:38,406 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:38,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:38,406 INFO L82 PathProgramCache]: Analyzing trace with hash 126211579, now seen corresponding path program 35 times [2018-12-09 13:30:38,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:38,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:38,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:38,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:38,407 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 6184 proven. 6302 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2018-12-09 13:30:38,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:38,992 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:38,992 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:38,992 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:38,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:38,992 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:38,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:30:38,998 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:30:39,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-12-09 13:30:39,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:39,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 6450 proven. 3539 refuted. 0 times theorem prover too weak. 5764 trivial. 0 not checked. [2018-12-09 13:30:40,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 6450 proven. 3539 refuted. 0 times theorem prover too weak. 5764 trivial. 0 not checked. [2018-12-09 13:30:41,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:41,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 37, 37] total 121 [2018-12-09 13:30:41,771 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:41,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-12-09 13:30:41,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-12-09 13:30:41,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-12-09 13:30:41,772 INFO L87 Difference]: Start difference. First operand 515 states and 520 transitions. Second operand 85 states. [2018-12-09 13:30:42,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:42,176 INFO L93 Difference]: Finished difference Result 730 states and 737 transitions. [2018-12-09 13:30:42,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-09 13:30:42,176 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 484 [2018-12-09 13:30:42,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:42,177 INFO L225 Difference]: With dead ends: 730 [2018-12-09 13:30:42,177 INFO L226 Difference]: Without dead ends: 528 [2018-12-09 13:30:42,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 897 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-12-09 13:30:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2018-12-09 13:30:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 527. [2018-12-09 13:30:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-12-09 13:30:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 530 transitions. [2018-12-09 13:30:42,189 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 530 transitions. Word has length 484 [2018-12-09 13:30:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:42,190 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 530 transitions. [2018-12-09 13:30:42,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-12-09 13:30:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 530 transitions. [2018-12-09 13:30:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-12-09 13:30:42,191 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:42,191 INFO L402 BasicCegarLoop]: trace histogram [84, 83, 83, 48, 48, 48, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:42,191 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:42,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash -900683181, now seen corresponding path program 36 times [2018-12-09 13:30:42,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:42,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:42,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:42,192 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17377 backedges. 6838 proven. 6864 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-12-09 13:30:42,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:42,850 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:42,850 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:42,850 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:42,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:42,850 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:42,856 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:30:42,856 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:30:42,897 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:30:42,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:42,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17377 backedges. 6838 proven. 6864 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-12-09 13:30:42,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17377 backedges. 6838 proven. 6864 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-12-09 13:30:43,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:43,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 53 [2018-12-09 13:30:43,703 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:43,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-09 13:30:43,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-09 13:30:43,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:43,704 INFO L87 Difference]: Start difference. First operand 527 states and 530 transitions. Second operand 51 states. [2018-12-09 13:30:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:43,809 INFO L93 Difference]: Finished difference Result 741 states and 744 transitions. [2018-12-09 13:30:43,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-09 13:30:43,810 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 508 [2018-12-09 13:30:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:43,810 INFO L225 Difference]: With dead ends: 741 [2018-12-09 13:30:43,810 INFO L226 Difference]: Without dead ends: 527 [2018-12-09 13:30:43,811 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 968 SyntacticMatches, 47 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-12-09 13:30:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2018-12-09 13:30:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-12-09 13:30:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 529 transitions. [2018-12-09 13:30:43,823 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 529 transitions. Word has length 508 [2018-12-09 13:30:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:43,823 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 529 transitions. [2018-12-09 13:30:43,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-09 13:30:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 529 transitions. [2018-12-09 13:30:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2018-12-09 13:30:43,824 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:43,824 INFO L402 BasicCegarLoop]: trace histogram [85, 84, 84, 49, 49, 49, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:43,825 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:43,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:43,825 INFO L82 PathProgramCache]: Analyzing trace with hash -125677012, now seen corresponding path program 37 times [2018-12-09 13:30:43,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:43,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:43,825 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17808 backedges. 6979 proven. 7154 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-12-09 13:30:44,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:44,517 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:44,517 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:44,517 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:44,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:44,517 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:44,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:44,523 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:44,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17808 backedges. 6979 proven. 7154 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-12-09 13:30:44,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17808 backedges. 6979 proven. 7154 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-12-09 13:30:45,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:45,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 53 [2018-12-09 13:30:45,391 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:45,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-09 13:30:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-09 13:30:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:45,392 INFO L87 Difference]: Start difference. First operand 527 states and 529 transitions. Second operand 52 states. [2018-12-09 13:30:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:45,512 INFO L93 Difference]: Finished difference Result 741 states and 743 transitions. [2018-12-09 13:30:45,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-09 13:30:45,513 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 514 [2018-12-09 13:30:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:45,513 INFO L225 Difference]: With dead ends: 741 [2018-12-09 13:30:45,514 INFO L226 Difference]: Without dead ends: 527 [2018-12-09 13:30:45,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 979 SyntacticMatches, 49 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-12-09 13:30:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-12-09 13:30:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2018-12-09 13:30:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-12-09 13:30:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 528 transitions. [2018-12-09 13:30:45,529 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 528 transitions. Word has length 514 [2018-12-09 13:30:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:45,529 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 528 transitions. [2018-12-09 13:30:45,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-09 13:30:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 528 transitions. [2018-12-09 13:30:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2018-12-09 13:30:45,531 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:45,531 INFO L402 BasicCegarLoop]: trace histogram [86, 85, 85, 50, 50, 50, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:45,532 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:45,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash 96662341, now seen corresponding path program 38 times [2018-12-09 13:30:45,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:45,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:45,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:45,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:45,533 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18245 backedges. 7120 proven. 7450 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2018-12-09 13:30:46,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:46,254 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:46,254 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:46,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:46,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:46,254 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:46,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 13:30:46,260 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 13:30:46,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-12-09 13:30:46,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:46,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18245 backedges. 7418 proven. 3963 refuted. 0 times theorem prover too weak. 6864 trivial. 0 not checked. [2018-12-09 13:30:47,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18245 backedges. 7418 proven. 3963 refuted. 0 times theorem prover too weak. 6864 trivial. 0 not checked. [2018-12-09 13:30:49,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:49,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 39, 39] total 128 [2018-12-09 13:30:49,373 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:49,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-12-09 13:30:49,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-12-09 13:30:49,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-12-09 13:30:49,374 INFO L87 Difference]: Start difference. First operand 527 states and 528 transitions. Second operand 90 states. [2018-12-09 13:30:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:49,790 INFO L93 Difference]: Finished difference Result 754 states and 757 transitions. [2018-12-09 13:30:49,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-12-09 13:30:49,791 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 520 [2018-12-09 13:30:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:49,791 INFO L225 Difference]: With dead ends: 754 [2018-12-09 13:30:49,791 INFO L226 Difference]: Without dead ends: 540 [2018-12-09 13:30:49,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 966 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-12-09 13:30:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2018-12-09 13:30:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 539. [2018-12-09 13:30:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2018-12-09 13:30:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2018-12-09 13:30:49,811 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 520 [2018-12-09 13:30:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:49,811 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2018-12-09 13:30:49,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-12-09 13:30:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2018-12-09 13:30:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-12-09 13:30:49,813 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:49,813 INFO L402 BasicCegarLoop]: trace histogram [89, 88, 88, 51, 51, 51, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:49,813 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:49,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1483378300, now seen corresponding path program 39 times [2018-12-09 13:30:49,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:49,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:49,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:49,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:49,814 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19532 backedges. 8213 proven. 4739 refuted. 0 times theorem prover too weak. 6580 trivial. 0 not checked. [2018-12-09 13:30:50,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:50,369 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:50,369 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:50,369 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:50,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:50,369 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:50,375 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 13:30:50,375 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 13:30:50,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 13:30:50,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 13:30:50,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19532 backedges. 176 proven. 19356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:51,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:30:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19532 backedges. 176 proven. 19356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 13:30:57,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:30:57,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 90, 90] total 179 [2018-12-09 13:30:57,165 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:30:57,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-12-09 13:30:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-12-09 13:30:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-12-09 13:30:57,167 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 91 states. [2018-12-09 13:30:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:30:57,440 INFO L93 Difference]: Finished difference Result 847 states and 897 transitions. [2018-12-09 13:30:57,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-09 13:30:57,440 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 538 [2018-12-09 13:30:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:30:57,441 INFO L225 Difference]: With dead ends: 847 [2018-12-09 13:30:57,441 INFO L226 Difference]: Without dead ends: 846 [2018-12-09 13:30:57,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 940 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=16110, Invalid=16110, Unknown=0, NotChecked=0, Total=32220 [2018-12-09 13:30:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2018-12-09 13:30:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 845. [2018-12-09 13:30:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 845 states. [2018-12-09 13:30:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 845 transitions. [2018-12-09 13:30:57,469 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 845 transitions. Word has length 538 [2018-12-09 13:30:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:30:57,469 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 845 transitions. [2018-12-09 13:30:57,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-12-09 13:30:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 845 transitions. [2018-12-09 13:30:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2018-12-09 13:30:57,472 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 13:30:57,472 INFO L402 BasicCegarLoop]: trace histogram [140, 139, 139, 89, 89, 89, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-12-09 13:30:57,472 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 13:30:57,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 13:30:57,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1706407949, now seen corresponding path program 40 times [2018-12-09 13:30:57,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 13:30:57,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:57,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 13:30:57,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 13:30:57,473 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 13:30:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 49163 backedges. 36209 proven. 12752 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2018-12-09 13:30:58,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:58,828 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 13:30:58,828 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 13:30:58,828 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 13:30:58,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 13:30:58,828 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 13:30:58,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 13:30:58,834 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 13:30:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 13:30:58,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 13:30:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49163 backedges. 32285 proven. 12752 refuted. 0 times theorem prover too weak. 4126 trivial. 0 not checked. [2018-12-09 13:30:59,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 13:31:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 49163 backedges. 32285 proven. 12752 refuted. 0 times theorem prover too weak. 4126 trivial. 0 not checked. [2018-12-09 13:31:00,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 13:31:00,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 55, 55] total 91 [2018-12-09 13:31:00,666 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 13:31:00,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-12-09 13:31:00,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-12-09 13:31:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-12-09 13:31:00,667 INFO L87 Difference]: Start difference. First operand 845 states and 845 transitions. Second operand 91 states. [2018-12-09 13:31:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 13:31:01,007 INFO L93 Difference]: Finished difference Result 845 states and 845 transitions. [2018-12-09 13:31:01,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-09 13:31:01,007 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 844 [2018-12-09 13:31:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 13:31:01,008 INFO L225 Difference]: With dead ends: 845 [2018-12-09 13:31:01,008 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 13:31:01,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1829 GetRequests, 1636 SyntacticMatches, 104 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-12-09 13:31:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 13:31:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 13:31:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 13:31:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 13:31:01,010 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 844 [2018-12-09 13:31:01,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 13:31:01,010 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 13:31:01,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-12-09 13:31:01,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 13:31:01,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 13:31:01,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 13:31:01,374 WARN L180 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 1052 DAG size of output: 456 [2018-12-09 13:31:02,901 WARN L180 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 449 DAG size of output: 400 [2018-12-09 13:31:02,904 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 13:31:02,904 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 14 27) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point L19(lines 19 23) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point mainErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 14 27) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 14 27) the Hoare annotation is: true [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point L24(line 24) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-12-09 13:31:02,904 INFO L448 ceAbstractionStarter]: For program point mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2018-12-09 13:31:02,905 INFO L444 ceAbstractionStarter]: At program point L18-2(lines 18 25) the Hoare annotation is: (let ((.cse9 (<= 51 main_~x~0)) (.cse34 (<= main_~y~0 26))) (let ((.cse0 (<= main_~y~0 21)) (.cse1 (<= main_~y~0 10)) (.cse20 (<= main_~y~0 47)) (.cse26 (<= main_~y~0 35)) (.cse22 (<= main_~y~0 28)) (.cse17 (<= main_~y~0 25)) (.cse6 (<= main_~y~0 1)) (.cse31 (<= main_~y~0 22)) (.cse15 (<= main_~y~0 43)) (.cse14 (<= main_~y~0 2)) (.cse10 (<= main_~y~0 38)) (.cse39 (<= main_~y~0 11)) (.cse32 (<= main_~y~0 13)) (.cse23 (<= main_~y~0 34)) (.cse40 (<= main_~y~0 41)) (.cse37 (<= main_~y~0 32)) (.cse18 (<= main_~y~0 33)) (.cse47 (<= main_~y~0 37)) (.cse12 (<= main_~y~0 5)) (.cse35 (<= main_~y~0 36)) (.cse13 (<= main_~y~0 27)) (.cse5 (<= main_~y~0 9)) (.cse28 (<= main_~y~0 45)) (.cse27 (<= main_~y~0 4)) (.cse43 (<= main_~y~0 3)) (.cse8 (<= main_~y~0 23)) (.cse42 (<= main_~y~0 18)) (.cse21 (<= main_~y~0 39)) (.cse36 (<= main_~y~0 15)) (.cse3 (<= main_~y~0 42)) (.cse29 (<= main_~y~0 16)) (.cse51 (<= main_~y~0 24)) (.cse45 (<= main_~y~0 14)) (.cse38 (<= main_~y~0 0)) (.cse7 (<= main_~y~0 7)) (.cse48 (<= main_~y~0 19)) (.cse53 (<= main_~y~0 50)) (.cse30 (<= main_~y~0 20)) (.cse11 (<= main_~y~0 12)) (.cse50 (<= main_~y~0 8)) (.cse25 (<= main_~y~0 49)) (.cse52 (<= main_~y~0 30)) (.cse16 (<= main_~y~0 48)) (.cse44 (<= main_~y~0 40)) (.cse2 (and .cse9 .cse34)) (.cse33 (<= main_~y~0 6)) (.cse54 (<= main_~y~0 44)) (.cse49 (<= main_~y~0 17)) (.cse24 (<= main_~x~0 50)) (.cse19 (<= main_~y~0 29)) (.cse4 (<= main_~x~0 51)) (.cse46 (<= main_~y~0 46)) (.cse41 (<= main_~y~0 31))) (or (and .cse0 (<= 21 main_~x~0) (<= main_~x~0 21)) (and .cse1 (<= main_~x~0 92) .cse2) (and .cse3 .cse4 (<= 42 main_~x~0)) (and .cse5 .cse2 (<= main_~x~0 93)) (and .cse2 .cse6 (<= main_~x~0 101)) (and (<= main_~x~0 95) .cse2 .cse7) (and (<= main_~x~0 79) .cse8 .cse2) (and (<= main_~x~0 64) .cse9 .cse10) (and .cse2 (<= main_~x~0 76)) (and .cse2 .cse11 (<= main_~x~0 90)) (and (<= 5 main_~x~0) .cse12 (<= main_~x~0 5)) (and .cse9 (<= main_~x~0 75) .cse13) (and (<= main_~x~0 100) .cse2 .cse14) (and .cse9 .cse15 (<= main_~x~0 59)) (and .cse9 (<= main_~x~0 54) .cse16) (and .cse0 (<= main_~x~0 81) .cse2) (and (<= 25 main_~x~0) .cse17 (<= main_~x~0 25)) (and .cse18 .cse4 (<= 33 main_~x~0)) (and .cse19 (<= main_~x~0 29) (<= 29 main_~x~0)) (and .cse20 (<= main_~x~0 55) .cse9) (and (<= main_~x~0 63) .cse9 .cse21) (and .cse22 (<= 28 main_~x~0) .cse4) (and .cse1 .cse4 (<= 10 main_~x~0)) (and .cse23 .cse9 (<= main_~x~0 68)) (and .cse20 (<= 47 main_~x~0) .cse24) (and (<= 49 main_~x~0) (<= main_~x~0 49) .cse25) (and (<= 35 main_~x~0) .cse26 (<= main_~x~0 35)) (and .cse26 .cse9 (<= main_~x~0 67)) (and .cse27 (<= 4 main_~x~0) (<= main_~x~0 4)) (and .cse22 .cse9 (<= main_~x~0 74)) (and .cse28 .cse9 (<= main_~x~0 57)) (and .cse2 (<= main_~x~0 77) .cse17) (and .cse29 (<= main_~x~0 86) .cse2) (and (<= 20 main_~x~0) .cse30 (<= main_~x~0 20)) (and .cse4 (<= 1 main_~x~0) .cse6) (and (<= main_~x~0 22) .cse31 (<= 22 main_~x~0)) (and .cse32 .cse2 (<= main_~x~0 89)) (and (<= main_~x~0 80) .cse2 .cse31) (and .cse33 (<= main_~x~0 6) (<= 6 main_~x~0)) (and .cse4 .cse34 (<= 26 main_~x~0)) (and .cse35 (<= main_~x~0 36) (<= 36 main_~x~0)) (and (<= main_~x~0 87) .cse2 .cse36) (and (<= 43 main_~x~0) .cse15 (<= main_~x~0 43)) (and (<= 2 main_~x~0) .cse14 (<= main_~x~0 2)) (and (<= main_~x~0 32) (<= 32 main_~x~0) .cse37) (and (<= main_~x~0 38) .cse10 (<= 38 main_~x~0)) (and (<= main_~x~0 0) (<= 0 main_~x~0) .cse38) (and .cse39 (<= main_~x~0 91) .cse2) (and .cse39 (<= 11 main_~x~0) (<= main_~x~0 11)) (and .cse32 (<= 13 main_~x~0) .cse24) (and .cse40 .cse9 (<= main_~x~0 61)) (and .cse9 (<= main_~x~0 71) .cse41) (and .cse4 .cse42 (<= 18 main_~x~0)) (and (<= main_~x~0 99) .cse2 .cse43) (and (<= 34 main_~x~0) .cse23 .cse4) (and .cse44 (<= main_~x~0 62) .cse9) (and .cse4 .cse45 (<= 14 main_~x~0)) (and .cse40 (<= 41 main_~x~0) (<= main_~x~0 41)) (and (<= main_~x~0 70) .cse9 .cse37) (and (<= main_~x~0 56) .cse9 .cse46) (and (<= 37 main_~x~0) .cse4 .cse47) (and .cse18 .cse9 (<= main_~x~0 69)) (and .cse47 .cse9 (<= main_~x~0 65)) (and .cse48 (<= main_~x~0 19) (<= 19 main_~x~0)) (and .cse49 .cse2 (<= main_~x~0 85)) (and .cse2 .cse12 (<= main_~x~0 97)) (and .cse35 .cse9 (<= main_~x~0 66)) (and (<= main_~x~0 27) .cse13 (<= 27 main_~x~0)) (and (<= (+ main_~y~0 1) 0) .cse2 (<= main_~x~0 103)) (and (<= 9 main_~x~0) .cse5 .cse24) (and (<= 45 main_~x~0) .cse28 (<= main_~x~0 45)) (and .cse27 .cse2 (<= main_~x~0 98)) (and .cse4 .cse43 (<= 3 main_~x~0)) (and .cse8 .cse4 (<= 23 main_~x~0)) (and .cse2 .cse42 (<= main_~x~0 84)) (and .cse2 (<= main_~x~0 94) .cse50) (and .cse51 .cse4 (<= 24 main_~x~0)) (and (<= 39 main_~x~0) .cse24 .cse21) (and (<= 30 main_~x~0) (<= main_~x~0 30) .cse52) (and .cse53 .cse9 (<= main_~x~0 52)) (and (<= 15 main_~x~0) .cse36 (<= main_~x~0 15)) (and .cse3 .cse9 (<= main_~x~0 60)) (and (<= 16 main_~x~0) .cse29 .cse4) (and (<= main_~x~0 78) .cse51 .cse2) (and (<= main_~x~0 88) .cse2 .cse45) (and .cse2 (<= main_~x~0 102) .cse38) (and .cse7 (<= main_~x~0 7) (<= 7 main_~x~0)) (and .cse2 (<= main_~x~0 83) .cse48) (and .cse53 (<= 50 main_~x~0) .cse24) (and .cse30 .cse2 (<= main_~x~0 82)) (and (<= 12 main_~x~0) .cse4 .cse11) (and (<= 8 main_~x~0) (<= main_~x~0 8) .cse50) (and .cse4 .cse9 (<= main_~y~0 51)) (and (<= main_~x~0 53) .cse9 .cse25) (and .cse9 (<= main_~x~0 72) .cse52) (and (<= 48 main_~x~0) (<= main_~x~0 48) .cse16) (and .cse44 .cse4 (<= 40 main_~x~0)) (and (<= main_~x~0 96) .cse2 .cse33) (and (<= 44 main_~x~0) (<= main_~x~0 44) .cse54) (and (<= main_~x~0 58) .cse9 .cse54) (and .cse49 (<= 17 main_~x~0) .cse24) (and .cse19 (<= main_~x~0 73) .cse9) (and (<= 46 main_~x~0) .cse4 .cse46) (and (<= 31 main_~x~0) (<= main_~x~0 31) .cse41)))) [2018-12-09 13:31:02,905 INFO L448 ceAbstractionStarter]: For program point mainErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2018-12-09 13:31:02,905 INFO L448 ceAbstractionStarter]: For program point L18-3(lines 18 25) no Hoare annotation was computed. [2018-12-09 13:31:02,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:31:02 BoogieIcfgContainer [2018-12-09 13:31:02,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 13:31:02,928 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 13:31:02,928 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 13:31:02,928 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 13:31:02,928 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:28:58" (3/4) ... [2018-12-09 13:31:02,932 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 13:31:02,937 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 13:31:02,938 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 13:31:02,941 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-09 13:31:02,941 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-09 13:31:02,941 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 13:31:02,971 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6a29bfc7-5a59-4758-bd01-caa2c2ba16f9/bin-2019/utaipan/witness.graphml [2018-12-09 13:31:02,972 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 13:31:02,972 INFO L168 Benchmark]: Toolchain (without parser) took 124646.28 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 326.6 MB). Free memory was 956.0 MB in the beginning and 1.0 GB in the end (delta: -70.1 MB). Peak memory consumption was 256.5 MB. Max. memory is 11.5 GB. [2018-12-09 13:31:02,973 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 13:31:02,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 114.62 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 13:31:02,973 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.92 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 13:31:02,973 INFO L168 Benchmark]: Boogie Preprocessor took 10.88 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 13:31:02,974 INFO L168 Benchmark]: RCFGBuilder took 143.89 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -144.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-09 13:31:02,974 INFO L168 Benchmark]: TraceAbstraction took 124318.86 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 222.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.7 MB). Peak memory consumption was 573.6 MB. Max. memory is 11.5 GB. [2018-12-09 13:31:02,974 INFO L168 Benchmark]: Witness Printer took 43.94 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 11.5 GB. [2018-12-09 13:31:02,976 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 114.62 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 10.92 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.88 ms. Allocated memory is still 1.0 GB. Free memory is still 945.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.89 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -144.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 124318.86 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 222.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.7 MB). Peak memory consumption was 573.6 MB. Max. memory is 11.5 GB. * Witness Printer took 43.94 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 21 && 21 <= x) && x <= 21) || ((y <= 10 && x <= 92) && 51 <= x && y <= 26)) || ((y <= 42 && x <= 51) && 42 <= x)) || ((y <= 9 && 51 <= x && y <= 26) && x <= 93)) || (((51 <= x && y <= 26) && y <= 1) && x <= 101)) || ((x <= 95 && 51 <= x && y <= 26) && y <= 7)) || ((x <= 79 && y <= 23) && 51 <= x && y <= 26)) || ((x <= 64 && 51 <= x) && y <= 38)) || ((51 <= x && y <= 26) && x <= 76)) || (((51 <= x && y <= 26) && y <= 12) && x <= 90)) || ((5 <= x && y <= 5) && x <= 5)) || ((51 <= x && x <= 75) && y <= 27)) || ((x <= 100 && 51 <= x && y <= 26) && y <= 2)) || ((51 <= x && y <= 43) && x <= 59)) || ((51 <= x && x <= 54) && y <= 48)) || ((y <= 21 && x <= 81) && 51 <= x && y <= 26)) || ((25 <= x && y <= 25) && x <= 25)) || ((y <= 33 && x <= 51) && 33 <= x)) || ((y <= 29 && x <= 29) && 29 <= x)) || ((y <= 47 && x <= 55) && 51 <= x)) || ((x <= 63 && 51 <= x) && y <= 39)) || ((y <= 28 && 28 <= x) && x <= 51)) || ((y <= 10 && x <= 51) && 10 <= x)) || ((y <= 34 && 51 <= x) && x <= 68)) || ((y <= 47 && 47 <= x) && x <= 50)) || ((49 <= x && x <= 49) && y <= 49)) || ((35 <= x && y <= 35) && x <= 35)) || ((y <= 35 && 51 <= x) && x <= 67)) || ((y <= 4 && 4 <= x) && x <= 4)) || ((y <= 28 && 51 <= x) && x <= 74)) || ((y <= 45 && 51 <= x) && x <= 57)) || (((51 <= x && y <= 26) && x <= 77) && y <= 25)) || ((y <= 16 && x <= 86) && 51 <= x && y <= 26)) || ((20 <= x && y <= 20) && x <= 20)) || ((x <= 51 && 1 <= x) && y <= 1)) || ((x <= 22 && y <= 22) && 22 <= x)) || ((y <= 13 && 51 <= x && y <= 26) && x <= 89)) || ((x <= 80 && 51 <= x && y <= 26) && y <= 22)) || ((y <= 6 && x <= 6) && 6 <= x)) || ((x <= 51 && y <= 26) && 26 <= x)) || ((y <= 36 && x <= 36) && 36 <= x)) || ((x <= 87 && 51 <= x && y <= 26) && y <= 15)) || ((43 <= x && y <= 43) && x <= 43)) || ((2 <= x && y <= 2) && x <= 2)) || ((x <= 32 && 32 <= x) && y <= 32)) || ((x <= 38 && y <= 38) && 38 <= x)) || ((x <= 0 && 0 <= x) && y <= 0)) || ((y <= 11 && x <= 91) && 51 <= x && y <= 26)) || ((y <= 11 && 11 <= x) && x <= 11)) || ((y <= 13 && 13 <= x) && x <= 50)) || ((y <= 41 && 51 <= x) && x <= 61)) || ((51 <= x && x <= 71) && y <= 31)) || ((x <= 51 && y <= 18) && 18 <= x)) || ((x <= 99 && 51 <= x && y <= 26) && y <= 3)) || ((34 <= x && y <= 34) && x <= 51)) || ((y <= 40 && x <= 62) && 51 <= x)) || ((x <= 51 && y <= 14) && 14 <= x)) || ((y <= 41 && 41 <= x) && x <= 41)) || ((x <= 70 && 51 <= x) && y <= 32)) || ((x <= 56 && 51 <= x) && y <= 46)) || ((37 <= x && x <= 51) && y <= 37)) || ((y <= 33 && 51 <= x) && x <= 69)) || ((y <= 37 && 51 <= x) && x <= 65)) || ((y <= 19 && x <= 19) && 19 <= x)) || ((y <= 17 && 51 <= x && y <= 26) && x <= 85)) || (((51 <= x && y <= 26) && y <= 5) && x <= 97)) || ((y <= 36 && 51 <= x) && x <= 66)) || ((x <= 27 && y <= 27) && 27 <= x)) || ((y + 1 <= 0 && 51 <= x && y <= 26) && x <= 103)) || ((9 <= x && y <= 9) && x <= 50)) || ((45 <= x && y <= 45) && x <= 45)) || ((y <= 4 && 51 <= x && y <= 26) && x <= 98)) || ((x <= 51 && y <= 3) && 3 <= x)) || ((y <= 23 && x <= 51) && 23 <= x)) || (((51 <= x && y <= 26) && y <= 18) && x <= 84)) || (((51 <= x && y <= 26) && x <= 94) && y <= 8)) || ((y <= 24 && x <= 51) && 24 <= x)) || ((39 <= x && x <= 50) && y <= 39)) || ((30 <= x && x <= 30) && y <= 30)) || ((y <= 50 && 51 <= x) && x <= 52)) || ((15 <= x && y <= 15) && x <= 15)) || ((y <= 42 && 51 <= x) && x <= 60)) || ((16 <= x && y <= 16) && x <= 51)) || ((x <= 78 && y <= 24) && 51 <= x && y <= 26)) || ((x <= 88 && 51 <= x && y <= 26) && y <= 14)) || (((51 <= x && y <= 26) && x <= 102) && y <= 0)) || ((y <= 7 && x <= 7) && 7 <= x)) || (((51 <= x && y <= 26) && x <= 83) && y <= 19)) || ((y <= 50 && 50 <= x) && x <= 50)) || ((y <= 20 && 51 <= x && y <= 26) && x <= 82)) || ((12 <= x && x <= 51) && y <= 12)) || ((8 <= x && x <= 8) && y <= 8)) || ((x <= 51 && 51 <= x) && y <= 51)) || ((x <= 53 && 51 <= x) && y <= 49)) || ((51 <= x && x <= 72) && y <= 30)) || ((48 <= x && x <= 48) && y <= 48)) || ((y <= 40 && x <= 51) && 40 <= x)) || ((x <= 96 && 51 <= x && y <= 26) && y <= 6)) || ((44 <= x && x <= 44) && y <= 44)) || ((x <= 58 && 51 <= x) && y <= 44)) || ((y <= 17 && 17 <= x) && x <= 50)) || ((y <= 29 && x <= 73) && 51 <= x)) || ((46 <= x && x <= 51) && y <= 46)) || ((31 <= x && x <= 31) && y <= 31) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 6 error locations. SAFE Result, 124.2s OverallTime, 97 OverallIterations, 140 TraceHistogramMax, 14.3s AutomataDifference, 0.0s DeadEndRemovalTime, 1.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 2499 SDtfs, 14737 SDslu, 18953 SDs, 0 SdLazy, 22028 SolverSat, 2881 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44291 GetRequests, 38734 SyntacticMatches, 493 SemanticMatches, 5064 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29401 ImplicationChecksByTransitivity, 90.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6566occurred in iteration=76, 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: 2.7s AutomataMinimizationTime, 97 MinimizatonAttempts, 111801 StatesRemovedByMinimization, 83 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 109 NumberOfFragments, 1156 HoareAnnotationTreeSize, 5 FomulaSimplifications, 7355 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 7812 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 97.5s InterpolantComputationTime, 41646 NumberOfCodeBlocks, 41016 NumberOfCodeBlocksAsserted, 918 NumberOfCheckSat, 62161 ConstructedInterpolants, 0 QuantifiedInterpolants, 49003815 SizeOfPredicates, 41 NumberOfNonLiveVariables, 33974 ConjunctsInSsa, 2672 ConjunctsInUnsatCore, 281 InterpolantComputations, 7 PerfectInterpolantSequences, 649560/1421741 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...