./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --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-new/gauss_sum_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 a235c453e8d82f15e0f227470cffc0947c40dcd4 --rcfgbuilder.size.of.a.code.block SingleStatement ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 09:55:00,419 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:55:00,421 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:55:00,440 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:55:00,441 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:55:00,442 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:55:00,443 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:55:00,446 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:55:00,448 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:55:00,448 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:55:00,450 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:55:00,450 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:55:00,451 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:55:00,452 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:55:00,453 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:55:00,454 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:55:00,455 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:55:00,458 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:55:00,460 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:55:00,462 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:55:00,463 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:55:00,465 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:55:00,467 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:55:00,468 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:55:00,468 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:55:00,469 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:55:00,470 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:55:00,471 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:55:00,472 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:55:00,474 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:55:00,474 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:55:00,475 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:55:00,475 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:55:00,475 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:55:00,478 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:55:00,479 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:55:00,479 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:55:00,508 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:55:00,508 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:55:00,510 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:55:00,510 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:55:00,511 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:55:00,511 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:55:00,511 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:55:00,512 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:55:00,512 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:55:00,513 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:55:00,513 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:55:00,514 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:55:00,514 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:55:00,514 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:55:00,514 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:55:00,515 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:55:00,515 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:55:00,515 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:55:00,515 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:55:00,515 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:55:00,515 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:55:00,516 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:55:00,517 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:55:00,517 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:55:00,517 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:55:00,517 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:55:00,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:55:00,518 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:55:00,518 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:55:00,518 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:55:00,518 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:55:00,519 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:55:00,520 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:55:00,520 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:55:00,520 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 -> a235c453e8d82f15e0f227470cffc0947c40dcd4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:55:00,587 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:55:00,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:55:00,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:55:00,606 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:55:00,606 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:55:00,608 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-10-22 09:55:00,671 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0952e83e/e9983ee9582b4c13b83419855aa190dd/FLAGe95c55f36 [2018-10-22 09:55:01,139 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:55:01,139 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-10-22 09:55:01,146 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0952e83e/e9983ee9582b4c13b83419855aa190dd/FLAGe95c55f36 [2018-10-22 09:55:01,161 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e0952e83e/e9983ee9582b4c13b83419855aa190dd [2018-10-22 09:55:01,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:55:01,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:55:01,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:55:01,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:55:01,173 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:55:01,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a2625e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01, skipping insertion in model container [2018-10-22 09:55:01,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:55:01,210 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:55:01,400 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:55:01,405 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:55:01,428 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:55:01,448 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:55:01,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01 WrapperNode [2018-10-22 09:55:01,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:55:01,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:55:01,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:55:01,450 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:55:01,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:55:01,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:55:01,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:55:01,478 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:55:01,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (1/1) ... [2018-10-22 09:55:01,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:55:01,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:55:01,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:55:01,513 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:55:01,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (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 09:55:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:55:01,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:55:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:55:01,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:55:01,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:55:01,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:55:01,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:55:01,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:55:02,057 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:55:02,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:02 BoogieIcfgContainer [2018-10-22 09:55:02,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:55:02,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:55:02,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:55:02,062 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:55:02,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:55:01" (1/3) ... [2018-10-22 09:55:02,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d88f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:55:02, skipping insertion in model container [2018-10-22 09:55:02,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:55:01" (2/3) ... [2018-10-22 09:55:02,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d88f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:55:02, skipping insertion in model container [2018-10-22 09:55:02,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:02" (3/3) ... [2018-10-22 09:55:02,066 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call_true-termination.i [2018-10-22 09:55:02,076 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:55:02,084 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:55:02,102 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:55:02,144 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:55:02,145 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:55:02,145 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:55:02,146 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:55:02,146 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:55:02,146 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:55:02,146 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:55:02,146 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:55:02,146 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:55:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-10-22 09:55:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 09:55:02,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:02,175 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:02,177 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:02,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1863969607, now seen corresponding path program 1 times [2018-10-22 09:55:02,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:02,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:02,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:02,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:02,238 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:02,318 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 09:55:02,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:55:02,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:55:02,321 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:55:02,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:55:02,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:55:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:55:02,341 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2018-10-22 09:55:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:02,364 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-10-22 09:55:02,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:55:02,365 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-10-22 09:55:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:02,375 INFO L225 Difference]: With dead ends: 44 [2018-10-22 09:55:02,375 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 09:55:02,379 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 09:55:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 09:55:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-22 09:55:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 09:55:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-22 09:55:02,419 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 18 [2018-10-22 09:55:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:02,420 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-22 09:55:02,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:55:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-22 09:55:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 09:55:02,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:02,422 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:02,422 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:02,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1976596368, now seen corresponding path program 1 times [2018-10-22 09:55:02,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:02,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:02,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:02,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:02,425 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:02,432 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 09:55:02,433 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 09:55:02,433 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 09:55:02,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:02,449 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-22 09:55:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:02,511 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-10-22 09:55:02,512 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:02,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:02,512 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:55:02,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:02,522 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:02,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:02,630 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 09:55:02,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:02,681 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 09:55:02,705 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:55:02,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-10-22 09:55:02,706 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:55:02,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 09:55:02,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 09:55:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:55:02,709 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 4 states. [2018-10-22 09:55:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:02,812 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-22 09:55:02,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 09:55:02,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-10-22 09:55:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:02,814 INFO L225 Difference]: With dead ends: 34 [2018-10-22 09:55:02,814 INFO L226 Difference]: Without dead ends: 29 [2018-10-22 09:55:02,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:55:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-22 09:55:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-22 09:55:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 09:55:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-22 09:55:02,830 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 19 [2018-10-22 09:55:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:02,830 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-22 09:55:02,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 09:55:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-22 09:55:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 09:55:02,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:02,834 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:02,835 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:02,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash -154266504, now seen corresponding path program 1 times [2018-10-22 09:55:02,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:02,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:02,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:02,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:02,837 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:02,848 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 09:55:02,849 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 09:55:02,849 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 09:55:02,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:02,858 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-22 09:55:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:02,895 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-10-22 09:55:02,897 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [9], [14], [15], [16], [20], [23], [25], [26], [28], [29], [30], [37], [40], [42], [48], [49], [50], [52] [2018-10-22 09:55:02,946 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:55:02,947 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:55:03,461 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:55:03,465 INFO L272 AbstractInterpreter]: Visited 24 different actions 139 times. Merged at 7 different actions 76 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-22 09:55:03,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:03,495 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:55:03,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:03,495 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:55:03,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:03,503 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:03,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:04,085 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 09:55:04,086 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:04,822 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 09:55:04,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:04,853 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 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:55:04,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:04,870 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:55:04,888 ERROR L235 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-10-22 09:55:04,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 09:55:04,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-10-22 09:55:04,889 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:04,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 09:55:04,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 09:55:04,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2018-10-22 09:55:04,893 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 20 states. [2018-10-22 09:55:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:05,787 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-22 09:55:05,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 09:55:05,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2018-10-22 09:55:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:05,790 INFO L225 Difference]: With dead ends: 38 [2018-10-22 09:55:05,791 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 09:55:05,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2018-10-22 09:55:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 09:55:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-22 09:55:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 09:55:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-22 09:55:05,799 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 25 [2018-10-22 09:55:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:05,799 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-22 09:55:05,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 09:55:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-22 09:55:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 09:55:05,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:55:05,801 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:55:05,801 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:55:05,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:55:05,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1120691040, now seen corresponding path program 2 times [2018-10-22 09:55:05,802 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:55:05,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:05,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:55:05,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:55:05,803 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:55:05,815 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 09:55:05,815 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 09:55:05,815 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 09:55:05,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:55:05,824 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-22 09:55:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:55:05,858 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:55:05,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:55:05,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:05,859 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 09:55:05,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:55:05,868 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:05,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:55:05,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:55:05,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:55:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:55:06,195 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:55:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 09:55:08,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:55:08,002 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 09:55:08,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:55:08,018 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:55:08,030 ERROR L235 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-10-22 09:55:08,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 09:55:08,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-10-22 09:55:08,031 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:55:08,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 09:55:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 09:55:08,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=480, Unknown=2, NotChecked=0, Total=552 [2018-10-22 09:55:08,033 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2018-10-22 09:55:08,923 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-10-22 09:55:09,495 WARN L179 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2018-10-22 09:55:10,246 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2018-10-22 09:55:30,619 WARN L179 SmtUtils]: Spent 16.87 s on a formula simplification that was a NOOP. DAG size: 31 [2018-10-22 09:55:52,598 WARN L179 SmtUtils]: Spent 10.09 s on a formula simplification that was a NOOP. DAG size: 30 [2018-10-22 09:55:52,619 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) (or (<= c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0)))) is different from true [2018-10-22 09:55:52,663 WARN L854 $PredicateComparison]: unable to prove that (and (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ c_main_~n~0 1) c_main_~n~0)) (< c_main_~i~0 c_main_~n~0)) (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0)))) is different from true [2018-10-22 09:55:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:55:52,674 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-22 09:55:52,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 09:55:52,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2018-10-22 09:55:52,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:55:52,676 INFO L225 Difference]: With dead ends: 40 [2018-10-22 09:55:52,676 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 09:55:52,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=186, Invalid=1217, Unknown=11, NotChecked=146, Total=1560 [2018-10-22 09:55:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 09:55:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 09:55:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 09:55:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 09:55:52,680 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2018-10-22 09:55:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:55:52,680 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 09:55:52,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 09:55:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 09:55:52,681 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 09:55:52,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 09:55:58,922 WARN L179 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2018-10-22 09:55:58,926 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 09:55:58,927 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:55:58,927 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:55:58,927 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 09:55:58,927 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 09:55:58,927 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 09:55:58,927 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2018-10-22 09:55:58,927 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-22 09:55:58,927 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-22 09:55:58,928 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 15 17) no Hoare annotation was computed. [2018-10-22 09:55:58,930 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2018-10-22 09:55:58,930 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-10-22 09:55:58,930 INFO L425 ceAbstractionStarter]: For program point L11(line 11) no Hoare annotation was computed. [2018-10-22 09:55:58,930 INFO L425 ceAbstractionStarter]: For program point L15-4(lines 15 17) no Hoare annotation was computed. [2018-10-22 09:55:58,930 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-10-22 09:55:58,930 INFO L425 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2018-10-22 09:55:58,930 INFO L425 ceAbstractionStarter]: For program point L15-6(line 15) no Hoare annotation was computed. [2018-10-22 09:55:58,931 INFO L421 ceAbstractionStarter]: At program point L15-7(lines 15 17) the Hoare annotation is: (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 main_~i~0) (* 2 main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< main_~i~0 main_~n~0) (< main_~n~0 main_~i~0))) (<= 1 main_~n~0) (or (<= main_~i~0 main_~n~0) (= (* 2 main_~sum~0) (* (+ main_~n~0 1) main_~n~0)))) [2018-10-22 09:55:58,932 INFO L421 ceAbstractionStarter]: At program point L15-8(lines 15 17) the Hoare annotation is: (and (<= 1 main_~n~0) (= (* 2 main_~sum~0) (* (+ main_~n~0 1) main_~n~0))) [2018-10-22 09:55:58,932 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2018-10-22 09:55:58,933 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-10-22 09:55:58,933 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-22 09:55:58,934 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-22 09:55:58,934 INFO L425 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-10-22 09:55:58,934 INFO L425 ceAbstractionStarter]: For program point L12-1(line 12) no Hoare annotation was computed. [2018-10-22 09:55:58,934 INFO L425 ceAbstractionStarter]: For program point L12-2(line 12) no Hoare annotation was computed. [2018-10-22 09:55:58,934 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 09:55:58,934 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 09:55:58,934 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:55:58,935 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 09:55:58,935 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 09:55:58,935 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:55:58,943 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:58,944 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:58,944 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:58,944 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:58,952 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:58,952 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:58,952 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:58,952 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:58,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:55:58 BoogieIcfgContainer [2018-10-22 09:55:58,955 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:55:58,955 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:55:58,955 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:55:58,956 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:55:58,956 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:55:02" (3/4) ... [2018-10-22 09:55:58,961 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 09:55:58,966 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 09:55:58,967 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 09:55:58,967 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 09:55:58,970 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-22 09:55:58,971 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-22 09:55:58,971 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 09:55:59,018 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:55:59,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:55:59,020 INFO L168 Benchmark]: Toolchain (without parser) took 57854.73 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 223.3 MB). Free memory was 953.2 MB in the beginning and 1.2 GB in the end (delta: -226.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:55:59,022 INFO L168 Benchmark]: CDTParser took 0.26 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 09:55:59,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.41 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 09:55:59,023 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.96 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 09:55:59,024 INFO L168 Benchmark]: Boogie Preprocessor took 33.41 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 09:55:59,024 INFO L168 Benchmark]: RCFGBuilder took 546.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 942.5 MB in the beginning and 1.2 GB in the end (delta: -211.7 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 09:55:59,025 INFO L168 Benchmark]: TraceAbstraction took 56896.44 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 53.0 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -32.8 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2018-10-22 09:55:59,026 INFO L168 Benchmark]: Witness Printer took 63.18 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2018-10-22 09:55:59,031 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 281.41 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 26.96 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 33.41 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. * RCFGBuilder took 546.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 942.5 MB in the beginning and 1.2 GB in the end (delta: -211.7 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 56896.44 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 53.0 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -32.8 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * Witness Printer took 63.18 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] * 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: 15]: Loop Invariant [2018-10-22 09:55:59,039 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:59,039 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:59,039 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:59,039 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:59,040 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:59,040 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:59,040 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 09:55:59,040 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] Derived loop invariant: ((forall main_~n~0 : int :: (2 * i + 2 * sum == (main_~n~0 + 1) * main_~n~0 || i < main_~n~0) || main_~n~0 < i) && 1 <= n) && (i <= n || 2 * sum == (n + 1) * n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. SAFE Result, 56.8s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 45.7s AutomataDifference, 0.0s DeadEndRemovalTime, 6.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 71 SDslu, 352 SDs, 0 SdLazy, 318 SolverSat, 30 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 47.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 17 NumberOfFragments, 56 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 125 FormulaSimplificationTreeSizeReductionInter, 6.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 161 ConstructedInterpolants, 8 QuantifiedInterpolants, 21871 SizeOfPredicates, 16 NumberOfNonLiveVariables, 132 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 2/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...