./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-lit/jm2006_true-unreach-call_true-termination.c.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-lit/jm2006_true-unreach-call_true-termination.c.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 37aa7dd2e80998c2241e95adb0e8008dc0337fe8 --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 10:18:35,911 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:18:35,913 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:18:35,931 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:18:35,931 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:18:35,932 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:18:35,936 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:18:35,939 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:18:35,941 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:18:35,950 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:18:35,951 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:18:35,954 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:18:35,955 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:18:35,956 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:18:35,957 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:18:35,958 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:18:35,962 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:18:35,968 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:18:35,974 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:18:35,976 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:18:35,979 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:18:35,980 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:18:35,983 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:18:35,983 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:18:35,985 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:18:35,986 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:18:35,986 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:18:35,988 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:18:35,989 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:18:35,991 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:18:35,992 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:18:35,993 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:18:35,996 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:18:35,996 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:18:35,997 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:18:35,998 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:18:35,998 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:18:36,032 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:18:36,032 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:18:36,033 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:18:36,033 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:18:36,034 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:18:36,034 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:18:36,035 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:18:36,035 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:18:36,035 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:18:36,035 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:18:36,035 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:18:36,036 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:18:36,036 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:18:36,036 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:18:36,038 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:18:36,038 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:18:36,038 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:18:36,038 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:18:36,039 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:18:36,039 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:18:36,039 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:18:36,039 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:18:36,039 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:18:36,040 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:18:36,041 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:18:36,042 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:18:36,042 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:18:36,042 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:18:36,042 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:18:36,042 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:18:36,043 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:18:36,043 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:18:36,043 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:18:36,043 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:18:36,044 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 -> 37aa7dd2e80998c2241e95adb0e8008dc0337fe8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:18:36,124 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:18:36,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:18:36,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:18:36,142 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:18:36,143 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:18:36,143 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_true-unreach-call_true-termination.c.i [2018-10-22 10:18:36,202 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f4036708f/073feaf72ed04dd88daade97c698e979/FLAG07e6cc036 [2018-10-22 10:18:36,667 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:18:36,668 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_true-unreach-call_true-termination.c.i [2018-10-22 10:18:36,676 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f4036708f/073feaf72ed04dd88daade97c698e979/FLAG07e6cc036 [2018-10-22 10:18:36,696 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f4036708f/073feaf72ed04dd88daade97c698e979 [2018-10-22 10:18:36,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:18:36,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:18:36,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:18:36,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:18:36,709 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:18:36,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:36,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd3dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36, skipping insertion in model container [2018-10-22 10:18:36,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:36,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:18:36,754 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:18:36,948 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:18:36,952 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:18:36,970 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:18:36,987 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:18:36,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36 WrapperNode [2018-10-22 10:18:36,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:18:36,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:18:36,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:18:36,989 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:18:36,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:18:37,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:18:37,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:18:37,011 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:18:37,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (1/1) ... [2018-10-22 10:18:37,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:18:37,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:18:37,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:18:37,032 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:18:37,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (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 10:18:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:18:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:18:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:18:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:18:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:18:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:18:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:18:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:18:37,466 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:18:37,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:37 BoogieIcfgContainer [2018-10-22 10:18:37,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:18:37,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:18:37,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:18:37,480 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:18:37,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:18:36" (1/3) ... [2018-10-22 10:18:37,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445d33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:18:37, skipping insertion in model container [2018-10-22 10:18:37,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:36" (2/3) ... [2018-10-22 10:18:37,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2445d33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:18:37, skipping insertion in model container [2018-10-22 10:18:37,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:37" (3/3) ... [2018-10-22 10:18:37,485 INFO L112 eAbstractionObserver]: Analyzing ICFG jm2006_true-unreach-call_true-termination.c.i [2018-10-22 10:18:37,497 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:18:37,506 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:18:37,525 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:18:37,569 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:18:37,569 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:18:37,570 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:18:37,570 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:18:37,570 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:18:37,570 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:18:37,570 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:18:37,570 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:18:37,570 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:18:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-22 10:18:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 10:18:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:37,598 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:37,601 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:37,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash 536890419, now seen corresponding path program 1 times [2018-10-22 10:18:37,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:37,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:37,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:37,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:37,656 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:37,721 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 10:18:37,724 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:18:37,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:18:37,724 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:18:37,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:18:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:18:37,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:18:37,748 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-22 10:18:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:37,773 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2018-10-22 10:18:37,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:18:37,774 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-22 10:18:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:37,784 INFO L225 Difference]: With dead ends: 34 [2018-10-22 10:18:37,784 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 10:18:37,788 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 10:18:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 10:18:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 10:18:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 10:18:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 10:18:37,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-22 10:18:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:37,828 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 10:18:37,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:18:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 10:18:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 10:18:37,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:37,829 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:37,829 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:37,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:37,830 INFO L82 PathProgramCache]: Analyzing trace with hash 704732235, now seen corresponding path program 1 times [2018-10-22 10:18:37,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:37,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:37,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:37,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:37,832 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:38,172 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2018-10-22 10:18:38,581 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 10:18:38,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:18:38,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-22 10:18:38,582 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:18:38,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 10:18:38,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 10:18:38,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-22 10:18:38,585 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-10-22 10:18:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:38,950 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-22 10:18:38,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 10:18:38,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-22 10:18:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:38,953 INFO L225 Difference]: With dead ends: 22 [2018-10-22 10:18:38,953 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 10:18:38,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:18:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 10:18:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 10:18:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 10:18:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 10:18:38,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-22 10:18:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:38,961 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 10:18:38,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 10:18:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 10:18:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 10:18:38,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:38,962 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:38,963 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:38,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash -796629243, now seen corresponding path program 1 times [2018-10-22 10:18:38,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:38,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:38,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:38,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:38,965 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:39,304 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 10:18:39,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:39,305 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:39,306 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-22 10:18:39,308 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [18], [24], [31], [34], [36], [42], [43], [44], [46] [2018-10-22 10:18:39,366 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 10:18:39,367 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 10:18:39,729 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 10:18:39,730 INFO L272 AbstractInterpreter]: Visited 14 different actions 68 times. Merged at 4 different actions 28 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-22 10:18:39,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:39,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 10:18:39,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:39,777 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 10:18:39,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:39,796 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:18:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:39,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:40,080 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 10:18:40,080 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:40,640 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 10:18:40,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:40,665 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 10:18:40,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:40,685 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:18:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:40,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:40,741 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 10:18:40,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:40,795 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 10:18:40,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:40,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 15 [2018-10-22 10:18:40,799 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:40,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 10:18:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 10:18:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-10-22 10:18:40,806 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2018-10-22 10:18:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:40,969 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-22 10:18:40,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 10:18:40,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-10-22 10:18:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:40,971 INFO L225 Difference]: With dead ends: 24 [2018-10-22 10:18:40,971 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 10:18:40,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-10-22 10:18:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 10:18:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 10:18:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 10:18:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 10:18:40,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-22 10:18:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:40,977 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 10:18:40,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 10:18:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 10:18:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 10:18:40,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:40,978 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:40,978 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:40,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:40,979 INFO L82 PathProgramCache]: Analyzing trace with hash -495998145, now seen corresponding path program 2 times [2018-10-22 10:18:40,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:40,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:40,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:40,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:40,980 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:41,309 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 10:18:41,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:41,310 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:41,310 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:18:41,310 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:18:41,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:41,311 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 10:18:41,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:18:41,325 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:18:41,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:18:41,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:41,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:41,495 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 10:18:41,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:41,687 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 10:18:41,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:41,709 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 10:18:41,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:18:41,725 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:18:41,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:18:41,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:41,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:41,897 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 10:18:41,897 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:41,914 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 10:18:41,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:41,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 18 [2018-10-22 10:18:41,916 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:41,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 10:18:41,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 10:18:41,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-10-22 10:18:41,918 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2018-10-22 10:18:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:42,169 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-10-22 10:18:42,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 10:18:42,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2018-10-22 10:18:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:42,171 INFO L225 Difference]: With dead ends: 30 [2018-10-22 10:18:42,171 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 10:18:42,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2018-10-22 10:18:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 10:18:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-22 10:18:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 10:18:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-22 10:18:42,176 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2018-10-22 10:18:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:42,177 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-22 10:18:42,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 10:18:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-22 10:18:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 10:18:42,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:42,178 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:42,178 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:42,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:42,179 INFO L82 PathProgramCache]: Analyzing trace with hash 209018931, now seen corresponding path program 3 times [2018-10-22 10:18:42,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:42,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:42,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:18:42,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:42,181 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 10:18:42,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:42,455 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:42,455 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:18:42,456 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:18:42,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:42,456 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 10:18:42,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:18:42,465 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:18:42,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 10:18:42,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:42,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:42,663 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:43,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:43,214 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:18:43,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:18:43,232 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:18:43,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 10:18:43,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:43,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:43,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:43,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:43,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 11] total 23 [2018-10-22 10:18:43,390 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:43,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 10:18:43,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 10:18:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2018-10-22 10:18:43,392 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2018-10-22 10:18:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:43,669 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-10-22 10:18:43,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 10:18:43,669 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2018-10-22 10:18:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:43,670 INFO L225 Difference]: With dead ends: 26 [2018-10-22 10:18:43,670 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 10:18:43,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2018-10-22 10:18:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 10:18:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 10:18:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 10:18:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 10:18:43,673 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-10-22 10:18:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:43,673 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 10:18:43,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 10:18:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 10:18:43,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 10:18:43,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 10:18:43,814 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 10:18:43,814 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:18:43,814 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:18:43,814 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 10:18:43,814 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 10:18:43,814 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 10:18:43,814 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2018-10-22 10:18:43,814 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2018-10-22 10:18:43,815 INFO L421 ceAbstractionStarter]: At program point L22(line 22) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 0)) [2018-10-22 10:18:43,815 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 23) no Hoare annotation was computed. [2018-10-22 10:18:43,815 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 20) no Hoare annotation was computed. [2018-10-22 10:18:43,815 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-22 10:18:43,815 INFO L421 ceAbstractionStarter]: At program point L17-3(lines 17 20) the Hoare annotation is: (let ((.cse1 (+ main_~x~0 main_~j~0)) (.cse0 (+ main_~y~0 main_~i~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2018-10-22 10:18:43,815 INFO L425 ceAbstractionStarter]: For program point L17-4(lines 10 25) no Hoare annotation was computed. [2018-10-22 10:18:43,815 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2018-10-22 10:18:43,815 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 10:18:43,816 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:18:43,816 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 10:18:43,816 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 10:18:43,816 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 10:18:43,816 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:18:43,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:18:43 BoogieIcfgContainer [2018-10-22 10:18:43,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:18:43,828 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:18:43,828 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:18:43,829 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:18:43,829 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:37" (3/4) ... [2018-10-22 10:18:43,832 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 10:18:43,837 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 10:18:43,838 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 10:18:43,838 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 10:18:43,842 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-22 10:18:43,842 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-10-22 10:18:43,843 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 10:18:43,902 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:18:43,902 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:18:43,906 INFO L168 Benchmark]: Toolchain (without parser) took 7205.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 214.4 MB). Free memory was 951.8 MB in the beginning and 1.1 GB in the end (delta: -175.1 MB). Peak memory consumption was 39.3 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:43,908 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:43,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.57 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:43,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.58 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:43,909 INFO L168 Benchmark]: Boogie Preprocessor took 20.68 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:43,910 INFO L168 Benchmark]: RCFGBuilder took 436.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -191.7 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:43,911 INFO L168 Benchmark]: TraceAbstraction took 6357.46 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.6 MB). Peak memory consumption was 63.9 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:43,914 INFO L168 Benchmark]: Witness Printer took 74.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:43,925 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 284.57 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 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 21.58 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.68 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 436.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -191.7 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6357.46 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.6 MB). Peak memory consumption was 63.9 MB. Max. memory is 11.5 GB. * Witness Printer took 74.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: y + i <= x + j && x + j <= y + i - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 6.2s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 68 SDtfs, 31 SDslu, 220 SDs, 0 SdLazy, 192 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 165 SyntacticMatches, 24 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s 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, 13 PreInvPairs, 24 NumberOfFragments, 27 HoareAnnotationTreeSize, 13 FomulaSimplifications, 104 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 142 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 184 NumberOfCodeBlocks, 184 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 273 ConstructedInterpolants, 0 QuantifiedInterpolants, 37333 SizeOfPredicates, 42 NumberOfNonLiveVariables, 312 ConjunctsInSsa, 142 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 2/140 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...