./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block LoopFreeBlock --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --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 1dbb3ffac91b20f4dd3e7b4eb671e84b2870fc33 --rcfgbuilder.size.of.a.code.block LoopFreeBlock ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 10:08:55,164 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:08:55,169 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:08:55,182 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:08:55,182 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:08:55,183 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:08:55,185 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:08:55,187 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:08:55,189 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:08:55,189 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:08:55,191 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:08:55,191 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:08:55,192 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:08:55,194 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:08:55,196 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:08:55,197 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:08:55,198 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:08:55,200 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:08:55,202 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:08:55,204 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:08:55,206 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:08:55,207 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:08:55,210 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:08:55,211 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:08:55,211 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:08:55,212 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:08:55,213 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:08:55,214 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:08:55,216 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:08:55,217 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:08:55,217 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:08:55,219 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:08:55,219 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:08:55,219 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:08:55,221 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:08:55,221 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:08:55,222 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:08:55,239 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:08:55,240 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:08:55,240 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:08:55,241 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:08:55,241 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:08:55,242 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:08:55,242 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:08:55,242 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:08:55,242 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:08:55,242 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:08:55,243 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:08:55,244 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:08:55,244 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:08:55,245 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:08:55,245 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:08:55,245 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:08:55,246 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:08:55,246 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:08:55,246 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:08:55,246 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:08:55,246 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:08:55,246 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:08:55,247 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:08:55,247 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:08:55,247 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:08:55,247 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:08:55,247 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:08:55,248 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:08:55,248 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:08:55,248 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:08:55,248 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:08:55,248 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:08:55,251 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:08:55,251 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:08:55,251 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 -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux 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 -> 1dbb3ffac91b20f4dd3e7b4eb671e84b2870fc33 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:08:55,328 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:08:55,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:08:55,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:08:55,350 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:08:55,351 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:08:55,352 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-10-22 10:08:55,409 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/68ad12137/e5f2c3dde22c461e9ad0880c858b1f2e/FLAGbc0985710 [2018-10-22 10:08:55,802 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:08:55,802 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04_true-unreach-call_true-termination.i [2018-10-22 10:08:55,809 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/68ad12137/e5f2c3dde22c461e9ad0880c858b1f2e/FLAGbc0985710 [2018-10-22 10:08:55,823 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/68ad12137/e5f2c3dde22c461e9ad0880c858b1f2e [2018-10-22 10:08:55,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:08:55,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:08:55,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:08:55,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:08:55,835 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:08:55,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:08:55" (1/1) ... [2018-10-22 10:08:55,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8267af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:55, skipping insertion in model container [2018-10-22 10:08:55,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:08:55" (1/1) ... [2018-10-22 10:08:55,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:08:55,874 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:08:56,084 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:08:56,089 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:08:56,111 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:08:56,131 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:08:56,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56 WrapperNode [2018-10-22 10:08:56,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:08:56,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:08:56,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:08:56,133 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:08:56,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:08:56,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:08:56,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:08:56,160 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:08:56,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... [2018-10-22 10:08:56,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:08:56,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:08:56,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:08:56,194 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:08:56,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:08:56,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:08:56,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:08:56,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:08:56,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:08:56,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:08:56,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:08:56,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:08:56,339 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:08:56,699 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:08:56,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:08:56 BoogieIcfgContainer [2018-10-22 10:08:56,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:08:56,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:08:56,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:08:56,713 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:08:56,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:08:55" (1/3) ... [2018-10-22 10:08:56,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b32535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:08:56, skipping insertion in model container [2018-10-22 10:08:56,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:08:56" (2/3) ... [2018-10-22 10:08:56,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b32535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:08:56, skipping insertion in model container [2018-10-22 10:08:56,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:08:56" (3/3) ... [2018-10-22 10:08:56,724 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_true-unreach-call_true-termination.i [2018-10-22 10:08:56,745 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:08:56,764 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:08:56,790 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:08:56,833 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:08:56,834 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:08:56,834 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:08:56,835 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:08:56,835 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:08:56,835 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:08:56,835 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:08:56,835 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:08:56,836 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:08:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-22 10:08:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 10:08:56,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:08:56,867 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:08:56,870 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:08:56,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:08:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1870586046, now seen corresponding path program 1 times [2018-10-22 10:08:56,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:08:56,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:56,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:08:56,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:56,943 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:08:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:08:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:57,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:08:57,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:08:57,006 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:08:57,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:08:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:08:57,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:08:57,028 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-22 10:08:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:08:57,052 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-22 10:08:57,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:08:57,054 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 10:08:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:08:57,064 INFO L225 Difference]: With dead ends: 29 [2018-10-22 10:08:57,064 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 10:08:57,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:08:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 10:08:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 10:08:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 10:08:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 10:08:57,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-22 10:08:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:08:57,109 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 10:08:57,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:08:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 10:08:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 10:08:57,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:08:57,110 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:08:57,110 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:08:57,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:08:57,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1861068280, now seen corresponding path program 1 times [2018-10-22 10:08:57,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:08:57,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:57,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:08:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:57,115 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:08:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:08:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:57,207 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:08:57,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 10:08:57,207 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:08:57,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 10:08:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 10:08:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 10:08:57,211 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-22 10:08:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:08:57,260 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 10:08:57,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 10:08:57,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-22 10:08:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:08:57,262 INFO L225 Difference]: With dead ends: 19 [2018-10-22 10:08:57,262 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 10:08:57,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 10:08:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 10:08:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 10:08:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 10:08:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 10:08:57,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 10:08:57,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:08:57,271 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 10:08:57,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 10:08:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 10:08:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 10:08:57,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:08:57,272 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:08:57,273 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:08:57,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:08:57,273 INFO L82 PathProgramCache]: Analyzing trace with hash -837480426, now seen corresponding path program 1 times [2018-10-22 10:08:57,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:08:57,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:57,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:08:57,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:57,276 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:08:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:08:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:57,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:57,428 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:08:57,430 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-22 10:08:57,432 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [21], [24], [26], [32], [33], [34], [36], [38] [2018-10-22 10:08:57,497 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 10:08:57,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 10:08:57,800 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 10:08:57,802 INFO L272 AbstractInterpreter]: Visited 12 different actions 51 times. Merged at 3 different actions 21 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-22 10:08:57,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:08:57,825 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 10:08:57,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:57,825 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:08:57,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:08:57,847 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:08:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:08:57,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:08:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:57,911 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:08:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:58,042 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:08:58,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:08:58,059 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:08:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:08:58,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:08:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:08:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:08:58,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 6 [2018-10-22 10:08:58,103 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:08:58,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 10:08:58,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 10:08:58,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 10:08:58,105 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-10-22 10:08:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:08:58,168 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 10:08:58,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 10:08:58,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-22 10:08:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:08:58,170 INFO L225 Difference]: With dead ends: 21 [2018-10-22 10:08:58,170 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 10:08:58,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 10:08:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 10:08:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 10:08:58,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 10:08:58,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 10:08:58,177 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-22 10:08:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:08:58,178 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 10:08:58,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 10:08:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 10:08:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 10:08:58,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:08:58,179 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:08:58,180 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:08:58,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:08:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash 17459892, now seen corresponding path program 2 times [2018-10-22 10:08:58,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:08:58,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:58,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:08:58,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:58,182 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:08:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:08:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:58,288 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:08:58,289 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:08:58,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:08:58,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:58,289 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:08:58,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:08:58,300 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:08:58,319 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:08:58,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:08:58,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:08:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:08:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:58,594 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:08:58,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:08:58,627 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:08:58,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:08:58,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:08:58,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:08:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:08:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:08:58,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-10-22 10:08:58,717 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:08:58,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 10:08:58,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 10:08:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 10:08:58,718 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-10-22 10:08:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:08:58,756 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-22 10:08:58,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 10:08:58,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-22 10:08:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:08:58,758 INFO L225 Difference]: With dead ends: 23 [2018-10-22 10:08:58,758 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 10:08:58,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 10:08:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 10:08:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 10:08:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 10:08:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 10:08:58,764 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-22 10:08:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:08:58,764 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 10:08:58,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 10:08:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 10:08:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 10:08:58,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:08:58,765 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:08:58,765 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:08:58,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:08:58,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1276351954, now seen corresponding path program 3 times [2018-10-22 10:08:58,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:08:58,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:58,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:08:58,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:58,768 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:08:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:08:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:58,864 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:08:58,864 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:08:58,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:08:58,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:58,865 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:08:58,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:08:58,880 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:08:58,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 10:08:58,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:08:58,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:08:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:58,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:08:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:59,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:59,150 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:08:59,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:08:59,175 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:08:59,208 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 10:08:59,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:08:59,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:08:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:59,217 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:08:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:59,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:08:59,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-10-22 10:08:59,238 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:08:59,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 10:08:59,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 10:08:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:08:59,240 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-10-22 10:08:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:08:59,278 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 10:08:59,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 10:08:59,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-22 10:08:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:08:59,280 INFO L225 Difference]: With dead ends: 25 [2018-10-22 10:08:59,280 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 10:08:59,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:08:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 10:08:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 10:08:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 10:08:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 10:08:59,285 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-22 10:08:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:08:59,286 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 10:08:59,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 10:08:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 10:08:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 10:08:59,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:08:59,287 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:08:59,287 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:08:59,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:08:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash -109153936, now seen corresponding path program 4 times [2018-10-22 10:08:59,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:08:59,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:59,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:08:59,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:59,289 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:08:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:08:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:59,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:59,389 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:08:59,390 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:08:59,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:08:59,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:59,390 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:08:59,401 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:08:59,402 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:08:59,412 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:08:59,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:08:59,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:08:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:59,421 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:08:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:59,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:08:59,546 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:08:59,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:08:59,565 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:08:59,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:08:59,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:08:59,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:08:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:59,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:08:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:08:59,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:08:59,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 10 [2018-10-22 10:08:59,916 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:08:59,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 10:08:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 10:08:59,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:08:59,920 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-10-22 10:08:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:08:59,964 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-22 10:08:59,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 10:08:59,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 10:08:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:08:59,966 INFO L225 Difference]: With dead ends: 27 [2018-10-22 10:08:59,966 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 10:08:59,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:08:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 10:08:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-22 10:08:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 10:08:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-22 10:08:59,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-22 10:08:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:08:59,976 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-22 10:08:59,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 10:08:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-22 10:08:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 10:08:59,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:08:59,977 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:08:59,977 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:08:59,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:08:59,978 INFO L82 PathProgramCache]: Analyzing trace with hash -140452466, now seen corresponding path program 5 times [2018-10-22 10:08:59,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:08:59,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:59,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:08:59,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:08:59,980 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:08:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:09:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:00,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:00,084 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:09:00,084 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:09:00,085 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:09:00,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:00,085 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:09:00,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 10:09:00,094 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:09:00,115 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 10:09:00,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:09:00,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:09:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:00,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:09:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:00,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:00,310 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:09:00,328 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 10:09:00,329 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:09:00,361 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 10:09:00,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:09:00,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:09:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:00,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:09:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:00,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:09:00,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 10 [2018-10-22 10:09:00,495 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:09:00,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 10:09:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 10:09:00,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:09:00,496 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-10-22 10:09:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:09:00,539 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-22 10:09:00,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 10:09:00,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-22 10:09:00,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:09:00,541 INFO L225 Difference]: With dead ends: 29 [2018-10-22 10:09:00,541 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 10:09:00,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:09:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 10:09:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-22 10:09:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 10:09:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-22 10:09:00,546 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-22 10:09:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:09:00,547 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-22 10:09:00,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 10:09:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-22 10:09:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 10:09:00,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:09:00,548 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:09:00,548 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:09:00,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:09:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash -153568724, now seen corresponding path program 6 times [2018-10-22 10:09:00,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:09:00,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:09:00,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:09:00,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:09:00,550 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:09:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:09:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:00,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:00,690 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:09:00,691 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:09:00,691 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:09:00,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:00,691 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:09:00,700 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 10:09:00,700 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 10:09:00,721 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 10:09:00,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:09:00,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:09:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:00,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:09:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:01,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:01,016 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:09:01,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 10:09:01,034 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 10:09:01,084 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 10:09:01,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:09:01,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:09:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:01,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:09:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:01,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:09:01,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 10 [2018-10-22 10:09:01,197 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:09:01,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 10:09:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 10:09:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:09:01,199 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2018-10-22 10:09:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:09:01,242 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-22 10:09:01,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 10:09:01,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-10-22 10:09:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:09:01,245 INFO L225 Difference]: With dead ends: 31 [2018-10-22 10:09:01,245 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 10:09:01,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 12 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:09:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 10:09:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-22 10:09:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 10:09:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-22 10:09:01,250 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-22 10:09:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:09:01,251 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-22 10:09:01,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 10:09:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-22 10:09:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 10:09:01,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:09:01,252 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:09:01,252 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:09:01,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:09:01,252 INFO L82 PathProgramCache]: Analyzing trace with hash 126609226, now seen corresponding path program 7 times [2018-10-22 10:09:01,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:09:01,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:09:01,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:09:01,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:09:01,254 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:09:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:09:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:01,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:01,371 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:09:01,372 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:09:01,372 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:09:01,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:01,372 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:09:01,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:09:01,381 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:09:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:09:01,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:09:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:01,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:09:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:01,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:01,546 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:09:01,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:09:01,564 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:09:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:09:01,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:09:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:01,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:09:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:01,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:09:01,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 10 [2018-10-22 10:09:01,734 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:09:01,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 10:09:01,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 10:09:01,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:09:01,735 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2018-10-22 10:09:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:09:01,770 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-22 10:09:01,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 10:09:01,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-10-22 10:09:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:09:01,774 INFO L225 Difference]: With dead ends: 33 [2018-10-22 10:09:01,774 INFO L226 Difference]: Without dead ends: 28 [2018-10-22 10:09:01,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:09:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-22 10:09:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-22 10:09:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 10:09:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-22 10:09:01,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-10-22 10:09:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:09:01,779 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-22 10:09:01,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 10:09:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-22 10:09:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 10:09:01,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:09:01,781 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:09:01,781 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:09:01,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:09:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1205320472, now seen corresponding path program 8 times [2018-10-22 10:09:01,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:09:01,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:09:01,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:09:01,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:09:01,783 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:09:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:09:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:02,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:02,074 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:09:02,074 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:09:02,074 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:09:02,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:02,074 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:09:02,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:09:02,083 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:09:02,100 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:09:02,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:09:02,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:09:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:02,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:09:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:02,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:09:02,552 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:09:02,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:09:02,570 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:09:02,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:09:02,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:09:02,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:09:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:02,812 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:09:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (17)] Exception during sending of exit command (exit): Broken pipe [2018-10-22 10:09:02,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:09:02,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 24 [2018-10-22 10:09:02,828 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:09:02,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 10:09:02,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 10:09:02,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2018-10-22 10:09:02,830 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 13 states. [2018-10-22 10:09:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:09:02,997 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-22 10:09:02,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 10:09:02,999 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2018-10-22 10:09:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:09:03,002 INFO L225 Difference]: With dead ends: 35 [2018-10-22 10:09:03,002 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 10:09:03,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2018-10-22 10:09:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 10:09:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-22 10:09:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-22 10:09:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-22 10:09:03,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-10-22 10:09:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:09:03,013 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-22 10:09:03,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 10:09:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-22 10:09:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 10:09:03,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:09:03,016 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:09:03,016 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:09:03,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:09:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1289506042, now seen corresponding path program 9 times [2018-10-22 10:09:03,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:09:03,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:09:03,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:09:03,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:09:03,019 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:09:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:09:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:09:03,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:09:03,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-10-22 10:09:03,159 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:09:03,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 10:09:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 10:09:03,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 10:09:03,160 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2018-10-22 10:09:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:09:03,209 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-22 10:09:03,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 10:09:03,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-10-22 10:09:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:09:03,210 INFO L225 Difference]: With dead ends: 30 [2018-10-22 10:09:03,210 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 10:09:03,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 10:09:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 10:09:03,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 10:09:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 10:09:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 10:09:03,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-10-22 10:09:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:09:03,212 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 10:09:03,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 10:09:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 10:09:03,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 10:09:03,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 10:09:03,438 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-10-22 10:09:03,442 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 10:09:03,442 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:09:03,442 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:09:03,442 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 10:09:03,442 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 10:09:03,442 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 10:09:03,442 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-10-22 10:09:03,442 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-10-22 10:09:03,442 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2018-10-22 10:09:03,443 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2018-10-22 10:09:03,443 INFO L425 ceAbstractionStarter]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2018-10-22 10:09:03,443 INFO L421 ceAbstractionStarter]: At program point L13-4(lines 13 15) the Hoare annotation is: (or (and (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6) (<= main_~sn~0 10)) (and (<= 1 main_~i~0) (<= main_~i~0 1) (<= main_~sn~0 0) (<= 0 main_~sn~0)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 7 main_~i~0) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= main_~i~0 7)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 4 main_~i~0) (<= main_~i~0 4)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 3) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= 4 main_~sn~0)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14))) [2018-10-22 10:09:03,443 INFO L421 ceAbstractionStarter]: At program point L13-5(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2018-10-22 10:09:03,443 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 10:09:03,444 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:09:03,444 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 10:09:03,444 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 10:09:03,444 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 10:09:03,444 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:09:03,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:09:03 BoogieIcfgContainer [2018-10-22 10:09:03,467 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:09:03,467 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:09:03,467 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:09:03,468 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:09:03,470 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:08:56" (3/4) ... [2018-10-22 10:09:03,474 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 10:09:03,481 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 10:09:03,482 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 10:09:03,483 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 10:09:03,488 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-22 10:09:03,488 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-22 10:09:03,488 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 10:09:03,545 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:09:03,545 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:09:03,546 INFO L168 Benchmark]: Toolchain (without parser) took 7718.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Free memory was 949.1 MB in the beginning and 1.1 GB in the end (delta: -104.4 MB). Peak memory consumption was 96.4 MB. Max. memory is 11.5 GB. [2018-10-22 10:09:03,548 INFO L168 Benchmark]: CDTParser took 1.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:09:03,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.96 ms. Allocated memory is still 1.0 GB. Free memory was 949.1 MB in the beginning and 937.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-22 10:09:03,550 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.41 ms. Allocated memory is still 1.0 GB. Free memory is still 937.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:09:03,551 INFO L168 Benchmark]: Boogie Preprocessor took 32.69 ms. Allocated memory is still 1.0 GB. Free memory is still 937.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:09:03,552 INFO L168 Benchmark]: RCFGBuilder took 506.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 937.0 MB in the beginning and 1.1 GB in the end (delta: -173.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2018-10-22 10:09:03,553 INFO L168 Benchmark]: TraceAbstraction took 6766.07 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 42.6 MB). Peak memory consumption was 112.3 MB. Max. memory is 11.5 GB. [2018-10-22 10:09:03,554 INFO L168 Benchmark]: Witness Printer took 78.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. [2018-10-22 10:09:03,560 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 301.96 ms. Allocated memory is still 1.0 GB. Free memory was 949.1 MB in the beginning and 937.0 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 26.41 ms. Allocated memory is still 1.0 GB. Free memory is still 937.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.69 ms. Allocated memory is still 1.0 GB. Free memory is still 937.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 506.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 937.0 MB in the beginning and 1.1 GB in the end (delta: -173.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6766.07 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 42.6 MB). Peak memory consumption was 112.3 MB. Max. memory is 11.5 GB. * Witness Printer took 78.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((10 <= sn && 6 <= i) && i <= 6) && sn <= 10) || (((1 <= i && i <= 1) && sn <= 0) && 0 <= sn)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((7 <= i && 12 <= sn) && sn <= 12) && i <= 7)) || (((6 <= sn && sn <= 6) && 4 <= i) && i <= 4)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 3 && sn <= 4) && 3 <= i) && 4 <= sn)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 6.6s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 138 SDtfs, 1 SDslu, 426 SDs, 0 SdLazy, 207 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 703 GetRequests, 576 SyntacticMatches, 44 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 530 NumberOfCodeBlocks, 528 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 807 ConstructedInterpolants, 0 QuantifiedInterpolants, 48121 SizeOfPredicates, 16 NumberOfNonLiveVariables, 824 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 43 InterpolantComputations, 3 PerfectInterpolantSequences, 90/1290 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...