./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i --full-output --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_variant_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 6b2483ed4878f440f5477fb40e4fe96958613e0f .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-21 12:38:26,080 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-21 12:38:26,083 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-21 12:38:26,099 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-21 12:38:26,099 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-21 12:38:26,101 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-21 12:38:26,102 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-21 12:38:26,104 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-21 12:38:26,106 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-21 12:38:26,107 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-21 12:38:26,108 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-21 12:38:26,108 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-21 12:38:26,109 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-21 12:38:26,111 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-21 12:38:26,112 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-21 12:38:26,113 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-21 12:38:26,114 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-21 12:38:26,116 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-21 12:38:26,118 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-21 12:38:26,120 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-21 12:38:26,121 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-21 12:38:26,123 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-21 12:38:26,126 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-21 12:38:26,126 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-21 12:38:26,126 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-21 12:38:26,127 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-21 12:38:26,129 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-21 12:38:26,129 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-21 12:38:26,130 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-21 12:38:26,132 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-21 12:38:26,132 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-21 12:38:26,133 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-21 12:38:26,133 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-21 12:38:26,133 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-21 12:38:26,135 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-21 12:38:26,136 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-21 12:38:26,136 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-21 12:38:26,156 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-21 12:38:26,157 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-21 12:38:26,158 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-21 12:38:26,158 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-21 12:38:26,158 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-21 12:38:26,158 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-21 12:38:26,158 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-21 12:38:26,158 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-21 12:38:26,160 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-21 12:38:26,160 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-21 12:38:26,160 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-21 12:38:26,161 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-21 12:38:26,161 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-21 12:38:26,162 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-21 12:38:26,162 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-21 12:38:26,162 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-21 12:38:26,162 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-21 12:38:26,162 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-21 12:38:26,162 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-21 12:38:26,163 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-21 12:38:26,163 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-21 12:38:26,163 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-21 12:38:26,163 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-21 12:38:26,163 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-21 12:38:26,164 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-21 12:38:26,165 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-21 12:38:26,165 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-21 12:38:26,166 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-21 12:38:26,166 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-21 12:38:26,166 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-21 12:38:26,167 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-21 12:38:26,167 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-21 12:38:26,167 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-21 12:38:26,167 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-21 12:38:26,167 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 -> 6b2483ed4878f440f5477fb40e4fe96958613e0f [2018-10-21 12:38:26,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-21 12:38:26,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-21 12:38:26,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-21 12:38:26,276 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-21 12:38:26,276 INFO L276 PluginConnector]: CDTParser initialized [2018-10-21 12:38:26,278 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i [2018-10-21 12:38:26,343 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e50c07bd7/21fcbe633649498d9455fac628f7dc28/FLAG5f0cd6669 [2018-10-21 12:38:26,786 INFO L298 CDTParser]: Found 1 translation units. [2018-10-21 12:38:26,787 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006_variant_true-unreach-call_true-termination.c.i [2018-10-21 12:38:26,796 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e50c07bd7/21fcbe633649498d9455fac628f7dc28/FLAG5f0cd6669 [2018-10-21 12:38:26,810 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e50c07bd7/21fcbe633649498d9455fac628f7dc28 [2018-10-21 12:38:26,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-21 12:38:26,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-21 12:38:26,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-21 12:38:26,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-21 12:38:26,821 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-21 12:38:26,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:38:26" (1/1) ... [2018-10-21 12:38:26,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f62964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:26, skipping insertion in model container [2018-10-21 12:38:26,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:38:26" (1/1) ... [2018-10-21 12:38:26,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-21 12:38:26,859 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-21 12:38:27,049 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:38:27,055 INFO L189 MainTranslator]: Completed pre-run [2018-10-21 12:38:27,077 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:38:27,097 INFO L193 MainTranslator]: Completed translation [2018-10-21 12:38:27,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27 WrapperNode [2018-10-21 12:38:27,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-21 12:38:27,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-21 12:38:27,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-21 12:38:27,099 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-21 12:38:27,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-21 12:38:27,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-21 12:38:27,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-21 12:38:27,124 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-21 12:38:27,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (1/1) ... [2018-10-21 12:38:27,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-21 12:38:27,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-21 12:38:27,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-21 12:38:27,163 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-21 12:38:27,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (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 [2018-10-21 12:38:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-21 12:38:27,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-21 12:38:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-21 12:38:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-21 12:38:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-21 12:38:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-21 12:38:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-21 12:38:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-21 12:38:27,711 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-21 12:38:27,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:38:27 BoogieIcfgContainer [2018-10-21 12:38:27,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-21 12:38:27,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-21 12:38:27,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-21 12:38:27,717 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-21 12:38:27,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 12:38:26" (1/3) ... [2018-10-21 12:38:27,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776c229d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:38:27, skipping insertion in model container [2018-10-21 12:38:27,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:27" (2/3) ... [2018-10-21 12:38:27,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776c229d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:38:27, skipping insertion in model container [2018-10-21 12:38:27,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:38:27" (3/3) ... [2018-10-21 12:38:27,722 INFO L112 eAbstractionObserver]: Analyzing ICFG jm2006_variant_true-unreach-call_true-termination.c.i [2018-10-21 12:38:27,733 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-21 12:38:27,744 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-21 12:38:27,779 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-21 12:38:27,818 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-21 12:38:27,819 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-21 12:38:27,819 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-21 12:38:27,819 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-21 12:38:27,819 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-21 12:38:27,820 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-21 12:38:27,820 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-21 12:38:27,820 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-21 12:38:27,820 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-21 12:38:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-21 12:38:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-21 12:38:27,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:27,850 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:27,852 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:27,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:27,858 INFO L82 PathProgramCache]: Analyzing trace with hash 380045771, now seen corresponding path program 1 times [2018-10-21 12:38:27,860 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:27,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:27,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:27,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:27,904 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:27,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:38:27,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-21 12:38:27,980 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:38:27,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-21 12:38:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-21 12:38:28,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-21 12:38:28,007 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-21 12:38:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:28,034 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2018-10-21 12:38:28,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-21 12:38:28,036 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-10-21 12:38:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:28,045 INFO L225 Difference]: With dead ends: 35 [2018-10-21 12:38:28,045 INFO L226 Difference]: Without dead ends: 15 [2018-10-21 12:38:28,049 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 [2018-10-21 12:38:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-21 12:38:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-21 12:38:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-21 12:38:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-21 12:38:28,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-21 12:38:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:28,086 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-21 12:38:28,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-21 12:38:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-21 12:38:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-21 12:38:28,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:28,088 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:28,088 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:28,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash 137515447, now seen corresponding path program 1 times [2018-10-21 12:38:28,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:28,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:28,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:28,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:28,092 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:28,536 WARN L179 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-10-21 12:38:28,707 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2018-10-21 12:38:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:29,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:38:29,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-21 12:38:29,017 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:38:29,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-21 12:38:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-21 12:38:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-21 12:38:29,020 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2018-10-21 12:38:29,235 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-10-21 12:38:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:29,425 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-21 12:38:29,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-21 12:38:29,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-10-21 12:38:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:29,427 INFO L225 Difference]: With dead ends: 23 [2018-10-21 12:38:29,427 INFO L226 Difference]: Without dead ends: 17 [2018-10-21 12:38:29,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-21 12:38:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-21 12:38:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-21 12:38:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-21 12:38:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-21 12:38:29,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-21 12:38:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:29,436 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-21 12:38:29,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-21 12:38:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-21 12:38:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-21 12:38:29,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:29,438 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:29,439 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:29,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash -431115791, now seen corresponding path program 1 times [2018-10-21 12:38:29,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:29,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:29,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:29,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:29,442 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:29,624 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-10-21 12:38:29,820 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-10-21 12:38:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:30,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:30,048 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:38:30,048 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-21 12:38:30,051 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [20], [22], [28], [35], [38], [40], [46], [47], [48], [50] [2018-10-21 12:38:30,103 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:38:30,104 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:38:30,725 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-21 12:38:30,726 INFO L272 AbstractInterpreter]: Visited 15 different actions 133 times. Merged at 4 different actions 60 times. Widened at 1 different actions 11 times. Found 1 fixpoints after 1 different actions. Largest state had 9 variables. [2018-10-21 12:38:30,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:30,772 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-21 12:38:30,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:30,772 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 [2018-10-21 12:38:30,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:30,784 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:38:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:30,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:30,964 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:31,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:31,244 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 [2018-10-21 12:38:31,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:31,263 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:38:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:31,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:31,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:31,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:38:31,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 17 [2018-10-21 12:38:31,421 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:38:31,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-21 12:38:31,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-21 12:38:31,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-10-21 12:38:31,424 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 12 states. [2018-10-21 12:38:31,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:31,603 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-21 12:38:31,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-21 12:38:31,606 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-10-21 12:38:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:31,607 INFO L225 Difference]: With dead ends: 25 [2018-10-21 12:38:31,607 INFO L226 Difference]: Without dead ends: 19 [2018-10-21 12:38:31,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-10-21 12:38:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-21 12:38:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-21 12:38:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-21 12:38:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-21 12:38:31,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-21 12:38:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:31,615 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-21 12:38:31,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-21 12:38:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-21 12:38:31,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-21 12:38:31,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:31,617 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:31,618 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:31,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:31,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1424888917, now seen corresponding path program 2 times [2018-10-21 12:38:31,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:31,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:31,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:31,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:31,620 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:31,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:31,942 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:38:31,942 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:38:31,942 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:38:31,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:31,942 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 [2018-10-21 12:38:31,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:38:31,951 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:38:31,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:38:31,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:38:31,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:32,118 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:32,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:32,282 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 [2018-10-21 12:38:32,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:38:32,298 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:38:32,319 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:38:32,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:38:32,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:32,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:32,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:38:32,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-21 12:38:32,488 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:38:32,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-21 12:38:32,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-21 12:38:32,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-10-21 12:38:32,489 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 14 states. [2018-10-21 12:38:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:32,736 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-21 12:38:32,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-21 12:38:32,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-10-21 12:38:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:32,738 INFO L225 Difference]: With dead ends: 31 [2018-10-21 12:38:32,739 INFO L226 Difference]: Without dead ends: 23 [2018-10-21 12:38:32,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2018-10-21 12:38:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-21 12:38:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-21 12:38:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-21 12:38:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-21 12:38:32,745 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-10-21 12:38:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:32,746 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-21 12:38:32,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-21 12:38:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-21 12:38:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-21 12:38:32,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:32,749 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:32,749 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:32,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1072393119, now seen corresponding path program 3 times [2018-10-21 12:38:32,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:32,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:32,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:38:32,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:32,752 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:32,938 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-21 12:38:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-21 12:38:33,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:33,195 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:38:33,195 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:38:33,196 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:38:33,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:33,196 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 [2018-10-21 12:38:33,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:38:33,209 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:38:33,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-21 12:38:33,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:38:33,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:33,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:33,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:33,875 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 [2018-10-21 12:38:33,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-21 12:38:33,891 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-21 12:38:33,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-21 12:38:33,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:38:33,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:33,967 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:34,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:38:34,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 11] total 25 [2018-10-21 12:38:34,030 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:38:34,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-21 12:38:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-21 12:38:34,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2018-10-21 12:38:34,031 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 17 states. [2018-10-21 12:38:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:34,309 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-21 12:38:34,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-21 12:38:34,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-10-21 12:38:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:34,311 INFO L225 Difference]: With dead ends: 27 [2018-10-21 12:38:34,311 INFO L226 Difference]: Without dead ends: 0 [2018-10-21 12:38:34,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2018-10-21 12:38:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-21 12:38:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-21 12:38:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-21 12:38:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-21 12:38:34,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-10-21 12:38:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:34,313 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-21 12:38:34,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-21 12:38:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-21 12:38:34,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-21 12:38:34,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-21 12:38:34,450 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-21 12:38:34,450 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:38:34,450 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:38:34,450 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-21 12:38:34,450 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-21 12:38:34,450 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-21 12:38:34,451 INFO L421 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 main_~z~0))) (and (<= .cse0 0) (<= 0 .cse0))) [2018-10-21 12:38:34,451 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2018-10-21 12:38:34,451 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 23) no Hoare annotation was computed. [2018-10-21 12:38:34,451 INFO L421 ceAbstractionStarter]: At program point L19-3(lines 19 23) the Hoare annotation is: (let ((.cse1 (+ main_~i~0 main_~y~0 main_~z~0)) (.cse0 (+ main_~x~0 main_~j~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2018-10-21 12:38:34,451 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-21 12:38:34,451 INFO L425 ceAbstractionStarter]: For program point L19-4(lines 10 28) no Hoare annotation was computed. [2018-10-21 12:38:34,451 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2018-10-21 12:38:34,451 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 28) the Hoare annotation is: true [2018-10-21 12:38:34,452 INFO L425 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-10-21 12:38:34,452 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-21 12:38:34,452 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-21 12:38:34,452 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:38:34,452 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-21 12:38:34,452 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-21 12:38:34,452 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-21 12:38:34,452 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:38:34,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 12:38:34 BoogieIcfgContainer [2018-10-21 12:38:34,467 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-21 12:38:34,468 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-21 12:38:34,468 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-21 12:38:34,468 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-21 12:38:34,469 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:38:27" (3/4) ... [2018-10-21 12:38:34,471 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-21 12:38:34,477 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-21 12:38:34,477 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-21 12:38:34,477 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-21 12:38:34,482 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-21 12:38:34,482 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-10-21 12:38:34,482 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-21 12:38:34,528 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-21 12:38:34,529 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-21 12:38:34,529 INFO L168 Benchmark]: Toolchain (without parser) took 7715.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.2 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -117.2 MB). Peak memory consumption was 92.0 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:34,530 INFO L168 Benchmark]: CDTParser took 0.34 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. [2018-10-21 12:38:34,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.18 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:34,531 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.25 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:38:34,532 INFO L168 Benchmark]: Boogie Preprocessor took 38.02 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:38:34,532 INFO L168 Benchmark]: RCFGBuilder took 549.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -170.3 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:34,533 INFO L168 Benchmark]: TraceAbstraction took 6754.37 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 42.4 MB). Peak memory consumption was 109.0 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:34,534 INFO L168 Benchmark]: Witness Printer took 60.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:38:34,537 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 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 281.18 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 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 25.25 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.02 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 549.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -170.3 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6754.37 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 42.4 MB). Peak memory consumption was 109.0 MB. Max. memory is 11.5 GB. * Witness Printer took 60.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. 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: 19]: Loop Invariant Derived loop invariant: x + j <= i + y + z && i + y + z <= x + j - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 6.6s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 74 SDtfs, 25 SDslu, 309 SDs, 0 SdLazy, 266 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.7s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 24 NumberOfFragments, 33 HoareAnnotationTreeSize, 13 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 192 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 44465 SizeOfPredicates, 42 NumberOfNonLiveVariables, 358 ConjunctsInSsa, 180 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...