./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_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/loop-acceleration/array_true-unreach-call1_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 60e6b615607c81d5d8be3edb90a3b8bafc35bf36 --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 10:13:18,153 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:13:18,157 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:13:18,171 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:13:18,172 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:13:18,173 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:13:18,174 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:13:18,177 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:13:18,179 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:13:18,181 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:13:18,183 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:13:18,184 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:13:18,185 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:13:18,186 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:13:18,187 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:13:18,188 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:13:18,189 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:13:18,191 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:13:18,193 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:13:18,195 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:13:18,196 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:13:18,198 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:13:18,200 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:13:18,201 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:13:18,201 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:13:18,202 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:13:18,203 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:13:18,204 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:13:18,205 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:13:18,207 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:13:18,207 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:13:18,208 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:13:18,208 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:13:18,208 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:13:18,209 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:13:18,210 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:13:18,211 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:13:18,230 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:13:18,231 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:13:18,232 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:13:18,232 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:13:18,233 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:13:18,233 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:13:18,233 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:13:18,233 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:13:18,233 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:13:18,233 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:13:18,234 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:13:18,234 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:13:18,234 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:13:18,235 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:13:18,237 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:13:18,237 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:13:18,237 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:13:18,238 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:13:18,238 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:13:18,238 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:13:18,238 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:13:18,238 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:13:18,239 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:13:18,239 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:13:18,239 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:13:18,239 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:13:18,239 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:13:18,240 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:13:18,242 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:13:18,243 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:13:18,243 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:13:18,243 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:13:18,243 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:13:18,244 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:13:18,244 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 -> 60e6b615607c81d5d8be3edb90a3b8bafc35bf36 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:13:18,297 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:13:18,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:13:18,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:13:18,315 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:13:18,316 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:13:18,317 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_true-termination.i [2018-10-22 10:13:18,376 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/83adef7b6/c6bdb9af0c4d4136908ee6915ab14d51/FLAGa86e2ff64 [2018-10-22 10:13:18,828 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:13:18,829 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_true-termination.i [2018-10-22 10:13:18,837 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/83adef7b6/c6bdb9af0c4d4136908ee6915ab14d51/FLAGa86e2ff64 [2018-10-22 10:13:18,859 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/83adef7b6/c6bdb9af0c4d4136908ee6915ab14d51 [2018-10-22 10:13:18,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:13:18,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:13:18,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:13:18,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:13:18,880 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:13:18,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:13:18" (1/1) ... [2018-10-22 10:13:18,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d43d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:18, skipping insertion in model container [2018-10-22 10:13:18,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:13:18" (1/1) ... [2018-10-22 10:13:18,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:13:18,919 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:13:19,105 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:13:19,109 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:13:19,132 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:13:19,157 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:13:19,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19 WrapperNode [2018-10-22 10:13:19,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:13:19,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:13:19,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:13:19,160 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:13:19,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:13:19,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:13:19,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:13:19,202 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:13:19,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (1/1) ... [2018-10-22 10:13:19,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:13:19,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:13:19,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:13:19,225 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:13:19,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (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 10:13:19,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:13:19,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:13:19,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:13:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:13:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:13:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:13:19,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:13:19,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:13:19,733 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:13:19,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:13:19 BoogieIcfgContainer [2018-10-22 10:13:19,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:13:19,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:13:19,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:13:19,739 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:13:19,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:13:18" (1/3) ... [2018-10-22 10:13:19,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68775ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:13:19, skipping insertion in model container [2018-10-22 10:13:19,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:13:19" (2/3) ... [2018-10-22 10:13:19,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68775ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:13:19, skipping insertion in model container [2018-10-22 10:13:19,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:13:19" (3/3) ... [2018-10-22 10:13:19,744 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call1_true-termination.i [2018-10-22 10:13:19,755 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:13:19,764 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:13:19,782 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:13:19,822 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:13:19,823 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:13:19,824 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:13:19,824 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:13:19,824 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:13:19,824 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:13:19,824 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:13:19,825 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:13:19,825 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:13:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-22 10:13:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 10:13:19,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:13:19,864 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:13:19,867 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:13:19,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:13:19,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2008638062, now seen corresponding path program 1 times [2018-10-22 10:13:19,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:13:19,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:19,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:13:19,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:19,937 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:13:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:13:20,011 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 10:13:20,014 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:13:20,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:13:20,015 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:13:20,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:13:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:13:20,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:13:20,041 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-22 10:13:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:13:20,066 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-10-22 10:13:20,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:13:20,068 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-22 10:13:20,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:13:20,076 INFO L225 Difference]: With dead ends: 31 [2018-10-22 10:13:20,076 INFO L226 Difference]: Without dead ends: 13 [2018-10-22 10:13:20,080 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 10:13:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-22 10:13:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-22 10:13:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 10:13:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-22 10:13:20,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-22 10:13:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:13:20,119 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-22 10:13:20,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:13:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-22 10:13:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 10:13:20,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:13:20,121 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:13:20,121 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:13:20,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:13:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1781972473, now seen corresponding path program 1 times [2018-10-22 10:13:20,122 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:13:20,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:20,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:13:20,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:20,124 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:13:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:13:20,236 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 10:13:20,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:13:20,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 10:13:20,237 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:13:20,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 10:13:20,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 10:13:20,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 10:13:20,241 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-10-22 10:13:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:13:20,288 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 10:13:20,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 10:13:20,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-22 10:13:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:13:20,290 INFO L225 Difference]: With dead ends: 21 [2018-10-22 10:13:20,290 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 10:13:20,292 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 10:13:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 10:13:20,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-22 10:13:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 10:13:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-22 10:13:20,297 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-22 10:13:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:13:20,298 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-22 10:13:20,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 10:13:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-22 10:13:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 10:13:20,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:13:20,300 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:13:20,300 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:13:20,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:13:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash 12173542, now seen corresponding path program 1 times [2018-10-22 10:13:20,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:13:20,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:20,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:13:20,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:20,304 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:13:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:13:20,478 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 10:13:20,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:13:20,479 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:13:20,483 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-10-22 10:13:20,485 INFO L202 CegarAbsIntRunner]: [5], [9], [12], [20], [24], [27], [29], [35], [36], [37], [39], [41], [42] [2018-10-22 10:13:20,540 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 10:13:20,541 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 10:13:21,185 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 10:13:21,186 INFO L272 AbstractInterpreter]: Visited 13 different actions 40 times. Merged at 2 different actions 18 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 29 variables. [2018-10-22 10:13:21,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:13:21,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 10:13:21,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:13:21,208 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 10:13:21,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:13:21,220 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:13:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:13:21,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:13:21,354 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 10:13:21,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:13:21,460 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 10:13:21,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:13:21,484 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 10:13:21,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:13:21,512 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:13:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:13:21,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:13:21,564 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 10:13:21,565 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:13:21,620 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 10:13:21,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:13:21,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-10-22 10:13:21,625 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:13:21,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 10:13:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 10:13:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 10:13:21,627 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-10-22 10:13:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:13:21,698 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-22 10:13:21,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 10:13:21,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-22 10:13:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:13:21,700 INFO L225 Difference]: With dead ends: 23 [2018-10-22 10:13:21,701 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 10:13:21,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 10:13:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 10:13:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-22 10:13:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 10:13:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-22 10:13:21,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-22 10:13:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:13:21,707 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-22 10:13:21,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 10:13:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-22 10:13:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 10:13:21,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:13:21,709 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:13:21,709 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:13:21,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:13:21,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1904608261, now seen corresponding path program 2 times [2018-10-22 10:13:21,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:13:21,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:21,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:13:21,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:21,713 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:13:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:13:21,848 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 10:13:21,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:13:21,848 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:13:21,849 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:13:21,849 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:13:21,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:13:21,849 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 10:13:21,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:13:21,860 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:13:21,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:13:21,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:13:21,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:13:22,013 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 10:13:22,013 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:13:22,143 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 10:13:22,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:13:22,165 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 10:13:22,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:13:22,183 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:13:22,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:13:22,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:13:22,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:13:22,249 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 10:13:22,249 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:13:22,286 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 10:13:22,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:13:22,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-10-22 10:13:22,290 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:13:22,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 10:13:22,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 10:13:22,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 10:13:22,291 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-10-22 10:13:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:13:22,399 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 10:13:22,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 10:13:22,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-22 10:13:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:13:22,401 INFO L225 Difference]: With dead ends: 25 [2018-10-22 10:13:22,401 INFO L226 Difference]: Without dead ends: 19 [2018-10-22 10:13:22,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 10:13:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-22 10:13:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-22 10:13:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-22 10:13:22,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-22 10:13:22,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-22 10:13:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:13:22,407 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-22 10:13:22,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 10:13:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-22 10:13:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 10:13:22,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:13:22,409 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:13:22,409 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:13:22,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:13:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash -531760284, now seen corresponding path program 3 times [2018-10-22 10:13:22,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:13:22,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:22,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:13:22,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:13:22,411 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:13:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:13:22,492 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 10:13:22,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:13:22,493 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:13:22,494 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:13:22,494 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:13:22,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:13:22,494 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 10:13:22,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:13:22,505 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:13:22,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-22 10:13:22,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:13:22,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:13:22,566 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2018-10-22 10:13:22,570 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2018-10-22 10:13:22,570 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 10:13:22,574 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 10:13:22,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 10:13:22,633 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-22 10:13:22,696 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2018-10-22 10:13:22,700 INFO L682 Elim1Store]: detected equality via solver [2018-10-22 10:13:22,703 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-10-22 10:13:22,703 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 10:13:22,715 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 10:13:22,725 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 10:13:22,726 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:30, output treesize:7 [2018-10-22 10:13:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 10:13:22,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:13:23,323 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-22 10:13:23,324 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 10:13:23,329 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 10:13:23,330 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:53, output treesize:1 [2018-10-22 10:13:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-22 10:13:23,355 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-22 10:13:23,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6] total 15 [2018-10-22 10:13:23,356 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:13:23,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 10:13:23,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 10:13:23,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-10-22 10:13:23,358 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2018-10-22 10:13:23,685 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-22 10:13:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:13:23,784 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 10:13:23,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 10:13:23,784 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-10-22 10:13:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:13:23,785 INFO L225 Difference]: With dead ends: 19 [2018-10-22 10:13:23,785 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 10:13:23,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2018-10-22 10:13:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 10:13:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 10:13:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 10:13:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 10:13:23,787 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-10-22 10:13:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:13:23,788 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 10:13:23,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 10:13:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 10:13:23,788 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 10:13:23,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 10:13:23,864 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-10-22 10:13:23,865 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-10-22 10:13:23,865 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:13:23,865 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:13:23,865 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 10:13:23,865 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 10:13:23,865 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 10:13:23,865 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 15) the Hoare annotation is: true [2018-10-22 10:13:23,865 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 15) no Hoare annotation was computed. [2018-10-22 10:13:23,866 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (< main_~i~0 1025) (<= 1023 |main_#t~mem1|) (exists ((main_~i~0 Int)) (and (< main_~i~0 1025) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0) (<= 1024 main_~i~0))) (< |main_#t~mem1| 1024) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0)) [2018-10-22 10:13:23,866 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-10-22 10:13:23,866 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 15) no Hoare annotation was computed. [2018-10-22 10:13:23,866 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2018-10-22 10:13:23,866 INFO L425 ceAbstractionStarter]: For program point L11-3(lines 11 13) no Hoare annotation was computed. [2018-10-22 10:13:23,866 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 13) the Hoare annotation is: (or (and (< main_~i~0 1025) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0)) (= main_~i~0 0)) [2018-10-22 10:13:23,866 INFO L425 ceAbstractionStarter]: For program point L11-5(lines 11 13) no Hoare annotation was computed. [2018-10-22 10:13:23,866 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-22 10:13:23,867 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-22 10:13:23,867 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-22 10:13:23,867 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-22 10:13:23,867 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-22 10:13:23,867 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-22 10:13:23,874 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-22 10:13:23,881 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-22 10:13:23,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:13:23 BoogieIcfgContainer [2018-10-22 10:13:23,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:13:23,884 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:13:23,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:13:23,884 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:13:23,885 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:13:19" (3/4) ... [2018-10-22 10:13:23,888 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 10:13:23,893 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 10:13:23,894 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 10:13:23,894 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 10:13:23,899 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2018-10-22 10:13:23,899 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-22 10:13:23,899 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-22 10:13:23,899 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-22 10:13:23,951 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:13:23,951 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:13:23,952 INFO L168 Benchmark]: Toolchain (without parser) took 5085.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 953.2 MB in the beginning and 865.6 MB in the end (delta: 87.6 MB). Peak memory consumption was 234.4 MB. Max. memory is 11.5 GB. [2018-10-22 10:13:23,954 INFO L168 Benchmark]: CDTParser took 0.21 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 10:13:23,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.75 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:13:23,955 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.17 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:13:23,955 INFO L168 Benchmark]: Boogie Preprocessor took 22.29 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-22 10:13:23,956 INFO L168 Benchmark]: RCFGBuilder took 509.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -186.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2018-10-22 10:13:23,957 INFO L168 Benchmark]: TraceAbstraction took 4147.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 865.6 MB in the end (delta: 258.3 MB). Peak memory consumption was 258.3 MB. Max. memory is 11.5 GB. [2018-10-22 10:13:23,958 INFO L168 Benchmark]: Witness Printer took 67.53 ms. Allocated memory is still 1.2 GB. Free memory is still 865.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:13:23,962 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 287.75 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.17 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.29 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 509.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -186.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4147.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 865.6 MB in the end (delta: 258.3 MB). Peak memory consumption was 258.3 MB. Max. memory is 11.5 GB. * Witness Printer took 67.53 ms. Allocated memory is still 1.2 GB. Free memory is still 865.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 11]: Loop Invariant [2018-10-22 10:13:23,970 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-22 10:13:23,970 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (i < 1025 && unknown-#memory_int-unknown[A][4 * i + A + -4] + 1 == i) || i == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 4.0s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 64 SDtfs, 4 SDslu, 89 SDs, 0 SdLazy, 36 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.7s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 15 NumberOfFragments, 73 HoareAnnotationTreeSize, 11 FomulaSimplifications, 42 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 149 NumberOfCodeBlocks, 145 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 212 ConstructedInterpolants, 1 QuantifiedInterpolants, 7157 SizeOfPredicates, 20 NumberOfNonLiveVariables, 418 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 24/76 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...