./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_10x0_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_10x0_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 03b834537fd67eba3e98faa1fce1fca3851f5bba ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 00:02:12,112 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 00:02:12,113 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 00:02:12,121 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 00:02:12,121 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 00:02:12,122 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 00:02:12,123 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 00:02:12,125 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 00:02:12,126 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 00:02:12,127 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 00:02:12,128 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 00:02:12,128 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 00:02:12,129 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 00:02:12,130 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 00:02:12,131 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 00:02:12,131 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 00:02:12,132 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 00:02:12,134 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 00:02:12,135 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 00:02:12,137 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 00:02:12,138 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 00:02:12,139 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 00:02:12,141 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 00:02:12,141 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 00:02:12,142 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 00:02:12,142 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 00:02:12,143 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 00:02:12,144 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 00:02:12,145 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 00:02:12,146 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 00:02:12,146 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 00:02:12,147 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 00:02:12,147 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 00:02:12,147 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 00:02:12,148 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 00:02:12,149 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 00:02:12,149 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-27 00:02:12,164 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 00:02:12,167 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 00:02:12,168 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 00:02:12,168 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 00:02:12,168 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 00:02:12,168 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 00:02:12,169 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 00:02:12,169 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 00:02:12,169 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 00:02:12,169 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 00:02:12,169 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 00:02:12,170 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 00:02:12,170 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 00:02:12,171 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 00:02:12,172 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 00:02:12,172 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 00:02:12,172 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 00:02:12,172 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 00:02:12,172 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 00:02:12,172 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 00:02:12,172 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 00:02:12,173 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 00:02:12,173 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 00:02:12,173 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 00:02:12,173 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 00:02:12,173 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 00:02:12,173 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 00:02:12,173 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 00:02:12,174 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 00:02:12,174 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 00:02:12,174 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 00:02:12,174 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 00:02:12,174 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 00:02:12,174 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 00:02:12,174 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_afce5c2e-9fba-4060-9179-09e527f0205f/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 ! call(__VERIFIER_error())) ) 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03b834537fd67eba3e98faa1fce1fca3851f5bba [2018-10-27 00:02:12,208 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 00:02:12,220 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 00:02:12,223 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 00:02:12,224 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 00:02:12,224 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 00:02:12,226 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/sum_10x0_false-unreach-call_true-termination.c [2018-10-27 00:02:12,270 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/data/9ab83ea98/813399f0de264c1ea1abeefb1e890c0e/FLAG54e8e6713 [2018-10-27 00:02:12,649 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 00:02:12,650 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/sv-benchmarks/c/recursive-simple/sum_10x0_false-unreach-call_true-termination.c [2018-10-27 00:02:12,655 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/data/9ab83ea98/813399f0de264c1ea1abeefb1e890c0e/FLAG54e8e6713 [2018-10-27 00:02:12,668 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/data/9ab83ea98/813399f0de264c1ea1abeefb1e890c0e [2018-10-27 00:02:12,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 00:02:12,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 00:02:12,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 00:02:12,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 00:02:12,676 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 00:02:12,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250b1434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12, skipping insertion in model container [2018-10-27 00:02:12,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 00:02:12,705 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 00:02:12,814 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:02:12,816 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 00:02:12,828 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:02:12,838 INFO L193 MainTranslator]: Completed translation [2018-10-27 00:02:12,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12 WrapperNode [2018-10-27 00:02:12,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 00:02:12,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 00:02:12,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 00:02:12,840 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 00:02:12,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 00:02:12,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 00:02:12,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 00:02:12,857 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 00:02:12,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... [2018-10-27 00:02:12,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 00:02:12,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 00:02:12,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 00:02:12,874 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 00:02:12,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 00:02:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 00:02:12,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 00:02:12,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 00:02:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 00:02:12,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 00:02:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-10-27 00:02:12,980 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-10-27 00:02:13,237 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 00:02:13,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:02:13 BoogieIcfgContainer [2018-10-27 00:02:13,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 00:02:13,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 00:02:13,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 00:02:13,241 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 00:02:13,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:02:12" (1/3) ... [2018-10-27 00:02:13,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eeca96b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:02:13, skipping insertion in model container [2018-10-27 00:02:13,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:02:12" (2/3) ... [2018-10-27 00:02:13,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eeca96b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:02:13, skipping insertion in model container [2018-10-27 00:02:13,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:02:13" (3/3) ... [2018-10-27 00:02:13,244 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_10x0_false-unreach-call_true-termination.c [2018-10-27 00:02:13,253 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 00:02:13,259 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 00:02:13,273 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 00:02:13,301 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 00:02:13,301 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 00:02:13,301 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 00:02:13,301 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 00:02:13,301 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 00:02:13,301 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 00:02:13,302 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 00:02:13,302 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 00:02:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-27 00:02:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-27 00:02:13,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:13,323 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:13,326 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:13,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-10-27 00:02:13,335 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:13,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:13,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:02:13,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:13,378 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 00:02:13,618 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:02:13,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 00:02:13,618 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:02:13,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 00:02:13,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 00:02:13,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 00:02:13,632 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-10-27 00:02:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:13,850 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-27 00:02:13,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 00:02:13,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-27 00:02:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:13,860 INFO L225 Difference]: With dead ends: 30 [2018-10-27 00:02:13,860 INFO L226 Difference]: Without dead ends: 18 [2018-10-27 00:02:13,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:02:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-27 00:02:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-27 00:02:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-27 00:02:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-27 00:02:13,897 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-10-27 00:02:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:13,898 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-27 00:02:13,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 00:02:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-27 00:02:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-27 00:02:13,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:13,900 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:13,900 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:13,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-10-27 00:02:13,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:13,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:13,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:02:13,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:13,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 00:02:13,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:13,999 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:14,000 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-27 00:02:14,001 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-10-27 00:02:14,043 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:02:14,043 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:02:14,252 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 00:02:14,253 INFO L272 AbstractInterpreter]: Visited 17 different actions 71 times. Never merged. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-10-27 00:02:14,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:14,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 00:02:14,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:14,266 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:14,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:02:14,274 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:02:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:14,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 00:02:14,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 00:02:14,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:14,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2018-10-27 00:02:14,911 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:14,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 00:02:14,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 00:02:14,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-27 00:02:14,912 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-10-27 00:02:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:14,971 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-27 00:02:14,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 00:02:14,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-10-27 00:02:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:14,973 INFO L225 Difference]: With dead ends: 25 [2018-10-27 00:02:14,973 INFO L226 Difference]: Without dead ends: 21 [2018-10-27 00:02:14,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-27 00:02:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-27 00:02:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-27 00:02:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-27 00:02:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-27 00:02:14,979 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-10-27 00:02:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:14,980 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-27 00:02:14,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 00:02:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-27 00:02:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-27 00:02:14,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:14,982 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:14,982 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:14,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-10-27 00:02:14,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:14,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:14,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:02:14,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:14,984 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 00:02:15,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:15,075 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:15,075 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:02:15,075 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:02:15,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:15,075 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:15,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:02:15,083 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 00:02:15,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-27 00:02:15,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:02:15,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 00:02:15,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:15,382 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 00:02:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 00:02:15,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:15,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-10-27 00:02:15,692 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:15,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 00:02:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 00:02:15,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-10-27 00:02:15,693 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-10-27 00:02:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:15,790 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-27 00:02:15,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 00:02:15,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-10-27 00:02:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:15,791 INFO L225 Difference]: With dead ends: 28 [2018-10-27 00:02:15,791 INFO L226 Difference]: Without dead ends: 24 [2018-10-27 00:02:15,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-10-27 00:02:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-27 00:02:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-27 00:02:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-27 00:02:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-27 00:02:15,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-10-27 00:02:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:15,797 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-27 00:02:15,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 00:02:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-27 00:02:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-27 00:02:15,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:15,798 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:15,799 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:15,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:15,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-10-27 00:02:15,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:15,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:15,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:02:15,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:15,802 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:02:15,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:15,921 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:15,921 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:02:15,921 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:02:15,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:15,922 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:15,928 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:02:15,928 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 00:02:15,940 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:02:15,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:02:15,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:02:15,958 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-27 00:02:16,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:16,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-10-27 00:02:16,442 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:16,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 00:02:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 00:02:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-10-27 00:02:16,443 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-10-27 00:02:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:16,497 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-27 00:02:16,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 00:02:16,498 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-10-27 00:02:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:16,499 INFO L225 Difference]: With dead ends: 31 [2018-10-27 00:02:16,499 INFO L226 Difference]: Without dead ends: 27 [2018-10-27 00:02:16,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2018-10-27 00:02:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-27 00:02:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-27 00:02:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-27 00:02:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-27 00:02:16,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-10-27 00:02:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:16,505 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-27 00:02:16,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 00:02:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-27 00:02:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-27 00:02:16,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:16,506 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:16,506 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:16,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-10-27 00:02:16,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:16,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:16,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:02:16,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:16,507 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 00:02:16,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:16,594 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:16,594 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:02:16,594 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:02:16,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:16,594 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:16,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:02:16,615 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:02:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:16,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 00:02:16,644 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 00:02:17,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:17,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2018-10-27 00:02:17,351 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:17,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 00:02:17,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 00:02:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-10-27 00:02:17,352 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-10-27 00:02:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:17,437 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-10-27 00:02:17,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 00:02:17,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-27 00:02:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:17,438 INFO L225 Difference]: With dead ends: 34 [2018-10-27 00:02:17,438 INFO L226 Difference]: Without dead ends: 30 [2018-10-27 00:02:17,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-10-27 00:02:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-27 00:02:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-27 00:02:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-27 00:02:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-27 00:02:17,441 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-10-27 00:02:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:17,442 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-27 00:02:17,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 00:02:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-27 00:02:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-27 00:02:17,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:17,443 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:17,443 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:17,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:17,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-10-27 00:02:17,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:17,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:17,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:02:17,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:17,447 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-27 00:02:17,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:17,540 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:17,540 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:02:17,540 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:02:17,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:17,540 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:17,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:02:17,547 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 00:02:17,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-27 00:02:17,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:02:17,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-27 00:02:17,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:18,020 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-27 00:02:18,469 WARN L179 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-27 00:02:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:02:18,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:18,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2018-10-27 00:02:18,933 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:18,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 00:02:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 00:02:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-10-27 00:02:18,934 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-10-27 00:02:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:19,016 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-27 00:02:19,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 00:02:19,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-10-27 00:02:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:19,018 INFO L225 Difference]: With dead ends: 37 [2018-10-27 00:02:19,018 INFO L226 Difference]: Without dead ends: 33 [2018-10-27 00:02:19,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2018-10-27 00:02:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-27 00:02:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-27 00:02:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-27 00:02:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-27 00:02:19,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-10-27 00:02:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:19,022 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-27 00:02:19,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 00:02:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-27 00:02:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-27 00:02:19,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:19,024 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:19,024 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:19,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:19,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-10-27 00:02:19,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:19,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:19,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:02:19,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:19,025 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 00:02:19,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:19,149 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:19,149 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:02:19,149 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:02:19,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:19,150 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:19,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:02:19,156 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 00:02:19,185 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:02:19,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:02:19,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 00:02:19,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-27 00:02:20,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:20,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2018-10-27 00:02:20,285 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:20,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 00:02:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 00:02:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-10-27 00:02:20,286 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-10-27 00:02:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:20,371 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-27 00:02:20,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 00:02:20,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-10-27 00:02:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:20,382 INFO L225 Difference]: With dead ends: 40 [2018-10-27 00:02:20,382 INFO L226 Difference]: Without dead ends: 36 [2018-10-27 00:02:20,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2018-10-27 00:02:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-27 00:02:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-27 00:02:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-27 00:02:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-27 00:02:20,392 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-10-27 00:02:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:20,393 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-27 00:02:20,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-27 00:02:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-27 00:02:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-27 00:02:20,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:20,394 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:20,394 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:20,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-10-27 00:02:20,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:20,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:20,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:02:20,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:20,395 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-27 00:02:20,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:20,546 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:20,547 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:02:20,547 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:02:20,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:20,547 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:20,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:02:20,553 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:02:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:20,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-27 00:02:20,594 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-27 00:02:22,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:22,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2018-10-27 00:02:22,083 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:22,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 00:02:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 00:02:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-10-27 00:02:22,084 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-10-27 00:02:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:22,169 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-27 00:02:22,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:02:22,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-10-27 00:02:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:22,171 INFO L225 Difference]: With dead ends: 43 [2018-10-27 00:02:22,171 INFO L226 Difference]: Without dead ends: 39 [2018-10-27 00:02:22,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-10-27 00:02:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-27 00:02:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-27 00:02:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-27 00:02:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-27 00:02:22,177 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-10-27 00:02:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:22,178 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-27 00:02:22,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 00:02:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-27 00:02:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-27 00:02:22,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:22,179 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:22,179 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:22,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:22,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-10-27 00:02:22,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:22,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:22,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:02:22,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:22,183 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-27 00:02:22,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:22,321 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:22,321 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:02:22,321 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:02:22,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:22,321 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:22,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:02:22,328 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 00:02:22,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-27 00:02:22,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:02:22,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-27 00:02:22,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-27 00:02:24,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:24,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2018-10-27 00:02:24,513 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:24,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 00:02:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 00:02:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2018-10-27 00:02:24,514 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-10-27 00:02:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:24,635 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-10-27 00:02:24,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 00:02:24,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-10-27 00:02:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:24,636 INFO L225 Difference]: With dead ends: 46 [2018-10-27 00:02:24,636 INFO L226 Difference]: Without dead ends: 42 [2018-10-27 00:02:24,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2018-10-27 00:02:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-27 00:02:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-27 00:02:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-27 00:02:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-27 00:02:24,643 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-10-27 00:02:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:24,643 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-27 00:02:24,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 00:02:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-27 00:02:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-27 00:02:24,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:24,644 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:24,644 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:24,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-10-27 00:02:24,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:24,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:24,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:02:24,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:24,647 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:02:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-27 00:02:24,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:24,775 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:02:24,775 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:02:24,775 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:02:24,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:02:24,775 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/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 [2018-10-27 00:02:24,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:02:24,781 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 00:02:24,796 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:02:24,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:02:24,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:02:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-27 00:02:24,808 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:02:26,273 WARN L179 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-10-27 00:02:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-27 00:02:27,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 00:02:27,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 24 [2018-10-27 00:02:27,641 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:02:27,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 00:02:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 00:02:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-10-27 00:02:27,641 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-10-27 00:02:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:02:27,731 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-27 00:02:27,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 00:02:27,732 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-10-27 00:02:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:02:27,733 INFO L225 Difference]: With dead ends: 49 [2018-10-27 00:02:27,733 INFO L226 Difference]: Without dead ends: 45 [2018-10-27 00:02:27,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2018-10-27 00:02:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-27 00:02:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-27 00:02:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-27 00:02:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-27 00:02:27,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-10-27 00:02:27,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:02:27,739 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-27 00:02:27,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 00:02:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-27 00:02:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-27 00:02:27,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:02:27,744 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:02:27,744 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:02:27,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:02:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-10-27 00:02:27,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:02:27,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:27,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:02:27,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:02:27,746 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:02:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 00:02:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 00:02:27,801 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-27 00:02:27,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:02:27 BoogieIcfgContainer [2018-10-27 00:02:27,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 00:02:27,842 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 00:02:27,842 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 00:02:27,842 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 00:02:27,842 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:02:13" (3/4) ... [2018-10-27 00:02:27,844 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-27 00:02:27,900 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_afce5c2e-9fba-4060-9179-09e527f0205f/bin-2019/utaipan/witness.graphml [2018-10-27 00:02:27,901 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 00:02:27,901 INFO L168 Benchmark]: Toolchain (without parser) took 15230.66 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 424.7 MB). Free memory was 959.8 MB in the beginning and 1.3 GB in the end (delta: -383.3 MB). Peak memory consumption was 41.4 MB. Max. memory is 11.5 GB. [2018-10-27 00:02:27,902 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:02:27,902 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.79 ms. Allocated memory is still 1.0 GB. Free memory was 959.8 MB in the beginning and 947.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-27 00:02:27,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.26 ms. Allocated memory is still 1.0 GB. Free memory is still 947.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:02:27,903 INFO L168 Benchmark]: Boogie Preprocessor took 16.43 ms. Allocated memory is still 1.0 GB. Free memory is still 947.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:02:27,903 INFO L168 Benchmark]: RCFGBuilder took 364.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -191.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. [2018-10-27 00:02:27,903 INFO L168 Benchmark]: TraceAbstraction took 14603.08 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 272.6 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -215.5 MB). Peak memory consumption was 57.2 MB. Max. memory is 11.5 GB. [2018-10-27 00:02:27,903 INFO L168 Benchmark]: Witness Printer took 59.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 11.5 GB. [2018-10-27 00:02:27,905 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 166.79 ms. Allocated memory is still 1.0 GB. Free memory was 959.8 MB in the beginning and 947.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.26 ms. Allocated memory is still 1.0 GB. Free memory is still 947.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.43 ms. Allocated memory is still 1.0 GB. Free memory is still 947.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 364.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -191.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14603.08 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 272.6 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -215.5 MB). Peak memory consumption was 57.2 MB. Max. memory is 11.5 GB. * Witness Printer took 59.17 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 10; [L13] int b = 0; VAL [a=10, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=10, m=0, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=9, m=1, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=8, m=2, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=7, m=3, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=6, m=4, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=5, m=5, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=4, m=6, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=3, m=7, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=2, m=8, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=1, m=9, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=0] [L4] COND TRUE n <= 0 [L5] RET return m + n; VAL [\old(m)=10, \old(n)=0, \result=10, m=10, n=0] [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1, m=9, n=1, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2, m=8, n=2, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3, m=7, n=3, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4, m=6, n=4, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5, m=5, n=5, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6, m=4, n=6, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7, m=3, n=7, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8, m=2, n=8, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9, m=1, n=9, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=10, m=0, n=10, sum(n - 1, m + 1)=10] [L7] RET return sum(n - 1, m + 1); [L14] EXPR sum(a, b) VAL [a=10, b=0, sum(a, b)=10] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=10, b=0, result=10] [L16] __VERIFIER_error() VAL [a=10, b=0, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 14.5s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 123 SDtfs, 163 SDslu, 569 SDs, 0 SdLazy, 446 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 960 GetRequests, 659 SyntacticMatches, 109 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 860 NumberOfCodeBlocks, 839 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1146 ConstructedInterpolants, 0 QuantifiedInterpolants, 150432 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1059 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 28 InterpolantComputations, 1 PerfectInterpolantSequences, 1065/2700 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...