./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.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/ddlm2013_true-unreach-call.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 17744505b3a424a40a1b2449004fea58677c1b94 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:38:05,068 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-21 12:38:05,070 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-21 12:38:05,082 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-21 12:38:05,083 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-21 12:38:05,084 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-21 12:38:05,085 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-21 12:38:05,088 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-21 12:38:05,090 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-21 12:38:05,090 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-21 12:38:05,091 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-21 12:38:05,092 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-21 12:38:05,093 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-21 12:38:05,094 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-21 12:38:05,096 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-21 12:38:05,096 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-21 12:38:05,098 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-21 12:38:05,100 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-21 12:38:05,102 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-21 12:38:05,107 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-21 12:38:05,110 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-21 12:38:05,113 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-21 12:38:05,115 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-21 12:38:05,116 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-21 12:38:05,116 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-21 12:38:05,117 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-21 12:38:05,117 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-21 12:38:05,119 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-21 12:38:05,120 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-21 12:38:05,121 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-21 12:38:05,121 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-21 12:38:05,122 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-21 12:38:05,122 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-21 12:38:05,122 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-21 12:38:05,123 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-21 12:38:05,124 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-21 12:38:05,124 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-21 12:38:05,152 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-21 12:38:05,153 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-21 12:38:05,154 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-21 12:38:05,155 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-21 12:38:05,155 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-21 12:38:05,155 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-21 12:38:05,155 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-21 12:38:05,155 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-21 12:38:05,155 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-21 12:38:05,157 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-21 12:38:05,157 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-21 12:38:05,159 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-21 12:38:05,160 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-21 12:38:05,160 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-21 12:38:05,160 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-21 12:38:05,161 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-21 12:38:05,161 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-21 12:38:05,161 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-21 12:38:05,161 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-21 12:38:05,161 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-21 12:38:05,161 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-21 12:38:05,162 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-21 12:38:05,162 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-21 12:38:05,162 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-21 12:38:05,162 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-21 12:38:05,162 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-21 12:38:05,163 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-21 12:38:05,166 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-21 12:38:05,166 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-21 12:38:05,166 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-21 12:38:05,167 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-21 12:38:05,167 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-21 12:38:05,167 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-21 12:38:05,167 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-21 12:38:05,167 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 -> 17744505b3a424a40a1b2449004fea58677c1b94 [2018-10-21 12:38:05,227 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-21 12:38:05,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-21 12:38:05,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-21 12:38:05,250 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-21 12:38:05,250 INFO L276 PluginConnector]: CDTParser initialized [2018-10-21 12:38:05,251 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.i [2018-10-21 12:38:05,310 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/057c970ce/cbd9a5c22f5a442b9f180087601f55be/FLAG04aeff9df [2018-10-21 12:38:05,771 INFO L298 CDTParser]: Found 1 translation units. [2018-10-21 12:38:05,772 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.i [2018-10-21 12:38:05,779 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/057c970ce/cbd9a5c22f5a442b9f180087601f55be/FLAG04aeff9df [2018-10-21 12:38:05,795 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/057c970ce/cbd9a5c22f5a442b9f180087601f55be [2018-10-21 12:38:05,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-21 12:38:05,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-21 12:38:05,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-21 12:38:05,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-21 12:38:05,806 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-21 12:38:05,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:38:05" (1/1) ... [2018-10-21 12:38:05,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7a11ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:05, skipping insertion in model container [2018-10-21 12:38:05,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:38:05" (1/1) ... [2018-10-21 12:38:05,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-21 12:38:05,844 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-21 12:38:06,036 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:38:06,041 INFO L189 MainTranslator]: Completed pre-run [2018-10-21 12:38:06,068 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:38:06,086 INFO L193 MainTranslator]: Completed translation [2018-10-21 12:38:06,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06 WrapperNode [2018-10-21 12:38:06,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-21 12:38:06,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-21 12:38:06,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-21 12:38:06,088 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-21 12:38:06,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-21 12:38:06,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-21 12:38:06,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-21 12:38:06,112 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-21 12:38:06,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (1/1) ... [2018-10-21 12:38:06,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-21 12:38:06,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-21 12:38:06,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-21 12:38:06,139 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-21 12:38:06,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (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 12:38:06,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-21 12:38:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-21 12:38:06,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-21 12:38:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-21 12:38:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-21 12:38:06,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-21 12:38:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-21 12:38:06,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-21 12:38:06,719 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-21 12:38:06,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:38:06 BoogieIcfgContainer [2018-10-21 12:38:06,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-21 12:38:06,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-21 12:38:06,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-21 12:38:06,732 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-21 12:38:06,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 12:38:05" (1/3) ... [2018-10-21 12:38:06,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb1448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:38:06, skipping insertion in model container [2018-10-21 12:38:06,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:38:06" (2/3) ... [2018-10-21 12:38:06,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb1448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:38:06, skipping insertion in model container [2018-10-21 12:38:06,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:38:06" (3/3) ... [2018-10-21 12:38:06,739 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013_true-unreach-call.i [2018-10-21 12:38:06,751 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-21 12:38:06,758 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-21 12:38:06,772 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-21 12:38:06,807 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-21 12:38:06,808 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-21 12:38:06,808 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-21 12:38:06,808 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-21 12:38:06,809 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-21 12:38:06,809 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-21 12:38:06,809 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-21 12:38:06,809 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-21 12:38:06,809 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-21 12:38:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-10-21 12:38:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-21 12:38:06,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:06,836 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:06,839 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:06,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2066841578, now seen corresponding path program 1 times [2018-10-21 12:38:06,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:06,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:06,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:06,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:06,890 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:06,961 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 12:38:06,963 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:38:06,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-21 12:38:06,964 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:38:06,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-21 12:38:06,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-21 12:38:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-21 12:38:06,990 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2018-10-21 12:38:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:07,014 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-10-21 12:38:07,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-21 12:38:07,016 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-21 12:38:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:07,027 INFO L225 Difference]: With dead ends: 36 [2018-10-21 12:38:07,027 INFO L226 Difference]: Without dead ends: 16 [2018-10-21 12:38:07,031 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 12:38:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-21 12:38:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-21 12:38:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-21 12:38:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-21 12:38:07,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-10-21 12:38:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:07,070 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-21 12:38:07,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-21 12:38:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-21 12:38:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-21 12:38:07,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:07,071 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:07,071 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:07,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1651906282, now seen corresponding path program 1 times [2018-10-21 12:38:07,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:07,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:07,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:07,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:07,074 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:07,274 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 12:38:07,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:38:07,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-21 12:38:07,277 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:38:07,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-21 12:38:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-21 12:38:07,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-21 12:38:07,279 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-10-21 12:38:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:07,357 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-21 12:38:07,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-21 12:38:07,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-21 12:38:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:07,359 INFO L225 Difference]: With dead ends: 25 [2018-10-21 12:38:07,359 INFO L226 Difference]: Without dead ends: 19 [2018-10-21 12:38:07,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-21 12:38:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-21 12:38:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-21 12:38:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-21 12:38:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-10-21 12:38:07,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-10-21 12:38:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:07,366 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-10-21 12:38:07,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-21 12:38:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-10-21 12:38:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-21 12:38:07,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:07,368 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:07,369 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:07,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:07,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1973708347, now seen corresponding path program 1 times [2018-10-21 12:38:07,369 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:07,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:07,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:07,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:07,372 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:07,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:07,784 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:38:07,786 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-10-21 12:38:07,790 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [15], [18], [20], [23], [32], [39], [42], [44], [50], [51], [52], [54] [2018-10-21 12:38:07,842 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:38:07,843 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:38:08,147 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-21 12:38:08,860 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-21 12:38:08,861 INFO L272 AbstractInterpreter]: Visited 16 different actions 174 times. Merged at 6 different actions 96 times. Widened at 1 different actions 12 times. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-21 12:38:08,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:08,907 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-21 12:38:08,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:08,908 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 12:38:08,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:08,925 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:38:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:08,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:09,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:09,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:09,721 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 12:38:09,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:09,738 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-21 12:38:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:09,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:09,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:09,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:38:09,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 15 [2018-10-21 12:38:09,845 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:38:09,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-21 12:38:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-21 12:38:09,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-10-21 12:38:09,847 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2018-10-21 12:38:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:09,973 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-10-21 12:38:09,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-21 12:38:09,974 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-10-21 12:38:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:09,975 INFO L225 Difference]: With dead ends: 32 [2018-10-21 12:38:09,975 INFO L226 Difference]: Without dead ends: 26 [2018-10-21 12:38:09,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-10-21 12:38:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-21 12:38:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-10-21 12:38:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-21 12:38:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-10-21 12:38:09,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2018-10-21 12:38:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:09,981 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-10-21 12:38:09,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-21 12:38:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-10-21 12:38:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-21 12:38:09,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:09,982 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:09,983 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:09,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:09,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1386902333, now seen corresponding path program 1 times [2018-10-21 12:38:09,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:09,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:09,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:09,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:09,985 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-21 12:38:10,036 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:38:10,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-21 12:38:10,036 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:38:10,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-21 12:38:10,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-21 12:38:10,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-21 12:38:10,038 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2018-10-21 12:38:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:10,050 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-10-21 12:38:10,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-21 12:38:10,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-10-21 12:38:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:10,051 INFO L225 Difference]: With dead ends: 36 [2018-10-21 12:38:10,051 INFO L226 Difference]: Without dead ends: 23 [2018-10-21 12:38:10,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-21 12:38:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-21 12:38:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-21 12:38:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-21 12:38:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-21 12:38:10,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2018-10-21 12:38:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:10,056 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-21 12:38:10,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-21 12:38:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-21 12:38:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-21 12:38:10,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:10,057 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:10,058 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:10,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:10,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1807628064, now seen corresponding path program 2 times [2018-10-21 12:38:10,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:10,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:10,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:10,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:10,059 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:10,354 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-10-21 12:38:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:10,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:10,709 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:38:10,709 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-21 12:38:10,709 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-21 12:38:10,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:10,711 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 12:38:10,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:38:10,719 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:38:10,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:38:10,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:38:10,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:11,072 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:13,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:13,906 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 12:38:13,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-21 12:38:13,922 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-21 12:38:13,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-21 12:38:13,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-21 12:38:13,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:14,020 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:38:14,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-21 12:38:14,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 21 [2018-10-21 12:38:14,127 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-21 12:38:14,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-21 12:38:14,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-21 12:38:14,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=348, Unknown=1, NotChecked=0, Total=420 [2018-10-21 12:38:14,128 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2018-10-21 12:38:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:16,703 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2018-10-21 12:38:16,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-21 12:38:16,706 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2018-10-21 12:38:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:16,707 INFO L225 Difference]: With dead ends: 60 [2018-10-21 12:38:16,707 INFO L226 Difference]: Without dead ends: 37 [2018-10-21 12:38:16,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=109, Invalid=539, Unknown=2, NotChecked=0, Total=650 [2018-10-21 12:38:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-21 12:38:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2018-10-21 12:38:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-21 12:38:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-10-21 12:38:16,713 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2018-10-21 12:38:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:16,713 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-10-21 12:38:16,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-21 12:38:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-10-21 12:38:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-21 12:38:16,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:38:16,715 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:38:16,715 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:38:16,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:16,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1736007175, now seen corresponding path program 1 times [2018-10-21 12:38:16,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:38:16,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:16,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-21 12:38:16,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:38:16,717 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:38:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-21 12:38:16,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:16,916 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:38:16,916 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-10-21 12:38:16,916 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [13], [15], [18], [20], [23], [25], [32], [39], [42], [44], [50], [51], [52], [54] [2018-10-21 12:38:16,918 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:38:16,918 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:38:16,935 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-21 12:38:17,276 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-21 12:38:17,276 INFO L272 AbstractInterpreter]: Visited 17 different actions 191 times. Merged at 6 different actions 96 times. Widened at 1 different actions 12 times. Found 1 fixpoints after 1 different actions. Largest state had 9 variables. [2018-10-21 12:38:17,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:38:17,315 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-21 12:38:17,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:38:17,316 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) [2018-10-21 12:38:17,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:38:17,333 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-21 12:38:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:38:17,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-21 12:38:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-21 12:38:17,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-21 12:38:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-21 12:38:17,487 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-21 12:38:17,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 6 [2018-10-21 12:38:17,487 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:38:17,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-21 12:38:17,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-21 12:38:17,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-21 12:38:17,488 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 3 states. [2018-10-21 12:38:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:38:17,504 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-21 12:38:17,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-21 12:38:17,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2018-10-21 12:38:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:38:17,507 INFO L225 Difference]: With dead ends: 27 [2018-10-21 12:38:17,507 INFO L226 Difference]: Without dead ends: 0 [2018-10-21 12:38:17,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-21 12:38:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-21 12:38:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-21 12:38:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-21 12:38:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-21 12:38:17,508 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2018-10-21 12:38:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:38:17,509 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-21 12:38:17,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-21 12:38:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-21 12:38:17,509 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-21 12:38:17,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-21 12:38:17,558 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-21 12:38:17,558 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:38:17,558 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:38:17,558 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-21 12:38:17,559 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-21 12:38:17,559 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-21 12:38:17,559 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2018-10-21 12:38:17,559 INFO L425 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2018-10-21 12:38:17,559 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 35) no Hoare annotation was computed. [2018-10-21 12:38:17,559 INFO L425 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2018-10-21 12:38:17,559 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2018-10-21 12:38:17,559 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 30) no Hoare annotation was computed. [2018-10-21 12:38:17,559 INFO L425 ceAbstractionStarter]: For program point L21-3(lines 10 35) no Hoare annotation was computed. [2018-10-21 12:38:17,560 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 35) no Hoare annotation was computed. [2018-10-21 12:38:17,560 INFO L421 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (and (<= main_~a~0 main_~b~0) (<= main_~b~0 main_~a~0)) [2018-10-21 12:38:17,560 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 35) the Hoare annotation is: true [2018-10-21 12:38:17,560 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2018-10-21 12:38:17,560 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-21 12:38:17,560 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:38:17,560 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-21 12:38:17,560 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-21 12:38:17,561 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-21 12:38:17,562 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:38:17,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 12:38:17 BoogieIcfgContainer [2018-10-21 12:38:17,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-21 12:38:17,566 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-21 12:38:17,566 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-21 12:38:17,566 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-21 12:38:17,566 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:38:06" (3/4) ... [2018-10-21 12:38:17,570 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-21 12:38:17,576 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-21 12:38:17,576 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-21 12:38:17,576 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-21 12:38:17,581 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-10-21 12:38:17,581 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-10-21 12:38:17,581 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-21 12:38:17,582 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-21 12:38:17,628 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-21 12:38:17,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-21 12:38:17,629 INFO L168 Benchmark]: Toolchain (without parser) took 11829.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 199.8 MB). Free memory was 951.8 MB in the beginning and 993.3 MB in the end (delta: -41.5 MB). Peak memory consumption was 158.2 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:17,630 INFO L168 Benchmark]: CDTParser took 0.20 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 12:38:17,630 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.01 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:17,631 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.06 ms. Allocated memory is still 1.0 GB. Free memory is still 941.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:38:17,631 INFO L168 Benchmark]: Boogie Preprocessor took 26.09 ms. Allocated memory is still 1.0 GB. Free memory is still 941.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:38:17,632 INFO L168 Benchmark]: RCFGBuilder took 581.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:17,632 INFO L168 Benchmark]: TraceAbstraction took 10844.83 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 98.7 MB). Peak memory consumption was 168.4 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:17,633 INFO L168 Benchmark]: Witness Printer took 62.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 993.3 MB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. [2018-10-21 12:38:17,637 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 285.01 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.0 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 24.06 ms. Allocated memory is still 1.0 GB. Free memory is still 941.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.09 ms. Allocated memory is still 1.0 GB. Free memory is still 941.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 581.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10844.83 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 98.7 MB). Peak memory consumption was 168.4 MB. Max. memory is 11.5 GB. * Witness Printer took 62.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 993.3 MB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 10.7s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 108 SDtfs, 30 SDslu, 266 SDs, 0 SdLazy, 115 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 192 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.5s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 15 PreInvPairs, 20 NumberOfFragments, 12 HoareAnnotationTreeSize, 15 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 306 ConstructedInterpolants, 0 QuantifiedInterpolants, 33576 SizeOfPredicates, 13 NumberOfNonLiveVariables, 315 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 58/131 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...