./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9f3cf63c7adaf3e2c576343bf7deb0d4236e103c --rcfgbuilder.size.of.a.code.block SingleStatement ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 09:53:42,830 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:53:42,831 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:53:42,845 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:53:42,846 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:53:42,847 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:53:42,848 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:53:42,850 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:53:42,852 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:53:42,853 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:53:42,854 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:53:42,854 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:53:42,855 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:53:42,856 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:53:42,858 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:53:42,859 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:53:42,860 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:53:42,862 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:53:42,864 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:53:42,865 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:53:42,867 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:53:42,868 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:53:42,871 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:53:42,871 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:53:42,871 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:53:42,872 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:53:42,873 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:53:42,875 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:53:42,875 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:53:42,877 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:53:42,877 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:53:42,878 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:53:42,878 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:53:42,878 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:53:42,880 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:53:42,880 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:53:42,881 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:53:42,898 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:53:42,898 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:53:42,899 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:53:42,899 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:53:42,899 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:53:42,900 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:53:42,900 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:53:42,900 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:53:42,900 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:53:42,900 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:53:42,900 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:53:42,902 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:53:42,902 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:53:42,903 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:53:42,903 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:53:42,903 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:53:42,903 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:53:42,903 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:53:42,903 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:53:42,904 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:53:42,905 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:53:42,905 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:53:42,905 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:53:42,905 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:53:42,905 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:53:42,906 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:53:42,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:53:42,907 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:53:42,907 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:53:42,907 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:53:42,907 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:53:42,907 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:53:42,908 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:53:42,908 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:53:42,908 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 -> 9f3cf63c7adaf3e2c576343bf7deb0d4236e103c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:53:42,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:53:42,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:53:42,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:53:42,981 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:53:42,981 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:53:42,982 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-22 09:53:43,038 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c9bda9167/71894e258ed9431db319d756e01c8f94/FLAG5175b5a21 [2018-10-22 09:53:43,484 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:53:43,484 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-22 09:53:43,491 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c9bda9167/71894e258ed9431db319d756e01c8f94/FLAG5175b5a21 [2018-10-22 09:53:43,514 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c9bda9167/71894e258ed9431db319d756e01c8f94 [2018-10-22 09:53:43,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:53:43,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:53:43,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:53:43,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:53:43,525 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:53:43,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b455115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43, skipping insertion in model container [2018-10-22 09:53:43,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:53:43,563 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:53:43,747 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:53:43,751 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:53:43,772 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:53:43,790 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:53:43,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43 WrapperNode [2018-10-22 09:53:43,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:53:43,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:53:43,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:53:43,792 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:53:43,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:53:43,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:53:43,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:53:43,816 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:53:43,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... [2018-10-22 09:53:43,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:53:43,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:53:43,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:53:43,852 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:53:43,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:53:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:53:43,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:53:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:53:43,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:53:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:53:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:53:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:53:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:53:44,420 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:53:44,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:53:44 BoogieIcfgContainer [2018-10-22 09:53:44,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:53:44,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:53:44,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:53:44,425 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:53:44,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:53:43" (1/3) ... [2018-10-22 09:53:44,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482727da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:53:44, skipping insertion in model container [2018-10-22 09:53:44,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:53:43" (2/3) ... [2018-10-22 09:53:44,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482727da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:53:44, skipping insertion in model container [2018-10-22 09:53:44,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:53:44" (3/3) ... [2018-10-22 09:53:44,430 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr_true-unreach-call_true-termination.i [2018-10-22 09:53:44,438 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:53:44,451 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:53:44,466 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:53:44,499 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:53:44,500 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:53:44,500 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:53:44,500 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:53:44,500 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:53:44,501 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:53:44,501 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:53:44,501 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:53:44,501 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:53:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-10-22 09:53:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 09:53:44,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:53:44,529 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:53:44,531 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:53:44,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:53:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1895758460, now seen corresponding path program 1 times [2018-10-22 09:53:44,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:53:44,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:44,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:53:44,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:44,587 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:53:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:53:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:53:44,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:53:44,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:53:44,652 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:53:44,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:53:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:53:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:53:44,675 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2018-10-22 09:53:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:53:44,704 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2018-10-22 09:53:44,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:53:44,708 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2018-10-22 09:53:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:53:44,722 INFO L225 Difference]: With dead ends: 69 [2018-10-22 09:53:44,722 INFO L226 Difference]: Without dead ends: 34 [2018-10-22 09:53:44,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:53:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-22 09:53:44,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-22 09:53:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 09:53:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-22 09:53:44,768 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 16 [2018-10-22 09:53:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:53:44,769 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-22 09:53:44,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:53:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-22 09:53:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 09:53:44,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:53:44,770 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:53:44,771 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:53:44,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:53:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash 969260985, now seen corresponding path program 1 times [2018-10-22 09:53:44,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:53:44,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:44,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:53:44,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:44,773 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:53:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:53:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:53:44,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:53:44,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 09:53:44,881 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:53:44,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 09:53:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 09:53:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:53:44,889 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 5 states. [2018-10-22 09:53:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:53:45,208 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-22 09:53:45,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 09:53:45,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-10-22 09:53:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:53:45,211 INFO L225 Difference]: With dead ends: 56 [2018-10-22 09:53:45,211 INFO L226 Difference]: Without dead ends: 49 [2018-10-22 09:53:45,212 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 [2018-10-22 09:53:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-22 09:53:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-10-22 09:53:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-22 09:53:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-22 09:53:45,221 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 22 [2018-10-22 09:53:45,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:53:45,221 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-22 09:53:45,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 09:53:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-22 09:53:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 09:53:45,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:53:45,225 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:53:45,228 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:53:45,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:53:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash -944841372, now seen corresponding path program 1 times [2018-10-22 09:53:45,230 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:53:45,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:45,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:53:45,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:45,235 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:53:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:53:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-22 09:53:45,386 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:53:45,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 09:53:45,386 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:53:45,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 09:53:45,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 09:53:45,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:53:45,387 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2018-10-22 09:53:45,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:53:45,704 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-22 09:53:45,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 09:53:45,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-10-22 09:53:45,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:53:45,706 INFO L225 Difference]: With dead ends: 59 [2018-10-22 09:53:45,707 INFO L226 Difference]: Without dead ends: 52 [2018-10-22 09:53:45,707 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 [2018-10-22 09:53:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-22 09:53:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2018-10-22 09:53:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-22 09:53:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-22 09:53:45,714 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2018-10-22 09:53:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:53:45,714 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-22 09:53:45,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 09:53:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-22 09:53:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-22 09:53:45,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:53:45,716 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:53:45,716 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:53:45,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:53:45,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1426259219, now seen corresponding path program 1 times [2018-10-22 09:53:45,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:53:45,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:45,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:53:45,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:45,718 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:53:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:53:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:53:45,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:53:45,847 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:53:45,848 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-10-22 09:53:45,851 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [7], [11], [13], [16], [17], [32], [33], [37], [39], [42], [43], [45], [46], [47], [48], [49], [50], [51], [52], [60], [64], [67], [69], [75], [76], [77], [79] [2018-10-22 09:53:45,901 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:53:45,901 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:53:46,332 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 09:53:46,334 INFO L272 AbstractInterpreter]: Visited 29 different actions 164 times. Merged at 13 different actions 114 times. Widened at 1 different actions 5 times. Found 4 fixpoints after 2 different actions. Largest state had 6 variables. [2018-10-22 09:53:46,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:53:46,351 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 09:53:46,498 INFO L232 lantSequenceWeakener]: Weakened 9 states. On average, predicates are now at 38.89% of their original sizes. [2018-10-22 09:53:46,499 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 09:53:47,056 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 09:53:47,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 09:53:47,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [7] total 19 [2018-10-22 09:53:47,058 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:53:47,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 09:53:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 09:53:47,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-10-22 09:53:47,061 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-22 09:53:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:53:49,084 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2018-10-22 09:53:49,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 09:53:49,084 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-10-22 09:53:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:53:49,085 INFO L225 Difference]: With dead ends: 81 [2018-10-22 09:53:49,086 INFO L226 Difference]: Without dead ends: 43 [2018-10-22 09:53:49,087 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2018-10-22 09:53:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-22 09:53:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2018-10-22 09:53:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 09:53:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-22 09:53:49,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 32 [2018-10-22 09:53:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:53:49,094 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-22 09:53:49,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 09:53:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-22 09:53:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 09:53:49,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:53:49,096 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:53:49,096 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:53:49,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:53:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1330691842, now seen corresponding path program 1 times [2018-10-22 09:53:49,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:53:49,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:49,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:53:49,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:53:49,098 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:53:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:53:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:53:49,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:53:49,242 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:53:49,242 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-10-22 09:53:49,243 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [7], [11], [13], [16], [17], [19], [20], [21], [22], [23], [32], [33], [37], [39], [42], [43], [45], [46], [47], [48], [49], [50], [51], [52], [60], [64], [67], [69], [75], [76], [77], [79] [2018-10-22 09:53:49,246 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:53:49,247 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:53:49,416 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-22 09:53:49,417 INFO L272 AbstractInterpreter]: Visited 34 different actions 284 times. Merged at 24 different actions 215 times. Widened at 3 different actions 11 times. Found 13 fixpoints after 5 different actions. Largest state had 7 variables. [2018-10-22 09:53:49,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:53:49,443 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-22 09:53:49,491 INFO L232 lantSequenceWeakener]: Weakened 12 states. On average, predicates are now at 41.67% of their original sizes. [2018-10-22 09:53:49,491 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-22 09:53:49,877 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-22 09:53:49,877 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-22 09:53:49,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [9] total 25 [2018-10-22 09:53:49,877 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:53:49,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 09:53:49,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 09:53:49,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-10-22 09:53:49,879 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2018-10-22 09:53:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:53:52,377 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2018-10-22 09:53:52,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 09:53:52,377 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2018-10-22 09:53:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:53:52,377 INFO L225 Difference]: With dead ends: 67 [2018-10-22 09:53:52,378 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 09:53:52,381 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 09:53:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 09:53:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 09:53:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 09:53:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 09:53:52,382 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-10-22 09:53:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:53:52,382 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 09:53:52,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 09:53:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 09:53:52,382 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 09:53:52,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 09:53:52,529 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 09:53:52,529 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:53:52,529 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 09:53:52,530 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 09:53:52,530 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 09:53:52,530 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 09:53:52,530 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2018-10-22 09:53:52,530 INFO L425 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L23-2(line 23) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L15-2(line 15) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L11(line 11) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L15-4(line 15) no Hoare annotation was computed. [2018-10-22 09:53:52,531 INFO L425 ceAbstractionStarter]: For program point L15-5(lines 14 17) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L15-6(lines 10 28) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L16-2(line 16) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 13) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L25(lines 10 28) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 24) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 24) no Hoare annotation was computed. [2018-10-22 09:53:52,532 INFO L425 ceAbstractionStarter]: For program point L21-2(line 21) no Hoare annotation was computed. [2018-10-22 09:53:52,533 INFO L425 ceAbstractionStarter]: For program point L21-4(line 21) no Hoare annotation was computed. [2018-10-22 09:53:52,533 INFO L425 ceAbstractionStarter]: For program point L21-5(lines 20 24) no Hoare annotation was computed. [2018-10-22 09:53:52,533 INFO L425 ceAbstractionStarter]: For program point L21-6(lines 10 28) no Hoare annotation was computed. [2018-10-22 09:53:52,533 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2018-10-22 09:53:52,533 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 28) the Hoare annotation is: true [2018-10-22 09:53:52,533 INFO L421 ceAbstractionStarter]: At program point L26(line 26) the Hoare annotation is: (or (and (<= main_~j~0 main_~i~0) (<= (* 2 main_~i~0) 398) (<= main_~i~0 (+ main_~j~0 100)) (<= 2 (* 2 main_~j~0))) (<= main_~i~0 99)) [2018-10-22 09:53:52,533 INFO L425 ceAbstractionStarter]: For program point L26-1(line 26) no Hoare annotation was computed. [2018-10-22 09:53:52,534 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-10-22 09:53:52,534 INFO L425 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-10-22 09:53:52,534 INFO L425 ceAbstractionStarter]: For program point L22-2(line 22) no Hoare annotation was computed. [2018-10-22 09:53:52,534 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 09:53:52,534 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:53:52,534 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 09:53:52,534 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 09:53:52,534 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 09:53:52,535 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 09:53:52,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:53:52 BoogieIcfgContainer [2018-10-22 09:53:52,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:53:52,538 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:53:52,538 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:53:52,539 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:53:52,539 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:53:44" (3/4) ... [2018-10-22 09:53:52,543 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 09:53:52,550 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 09:53:52,551 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 09:53:52,551 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 09:53:52,555 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-10-22 09:53:52,556 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-10-22 09:53:52,556 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 09:53:52,598 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:53:52,598 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:53:52,599 INFO L168 Benchmark]: Toolchain (without parser) took 9080.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.4 MB). Free memory was 951.8 MB in the beginning and 1.0 GB in the end (delta: -80.7 MB). Peak memory consumption was 110.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:53:52,601 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:53:52,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.20 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:53:52,602 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.13 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:53:52,603 INFO L168 Benchmark]: Boogie Preprocessor took 28.35 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:53:52,603 INFO L168 Benchmark]: RCFGBuilder took 568.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -145.7 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 09:53:52,604 INFO L168 Benchmark]: TraceAbstraction took 8116.07 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 54.3 MB). Peak memory consumption was 128.2 MB. Max. memory is 11.5 GB. [2018-10-22 09:53:52,605 INFO L168 Benchmark]: Witness Printer took 60.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:53:52,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 270.20 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.13 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.35 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 568.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -145.7 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8116.07 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 54.3 MB). Peak memory consumption was 128.2 MB. Max. memory is 11.5 GB. * Witness Printer took 60.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. SAFE Result, 8.0s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 5.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 150 SDtfs, 273 SDslu, 550 SDs, 0 SdLazy, 274 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 131 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.7s AbstIntTime, 2 AbstIntIterations, 2 AbstIntStrong, 0.9189095928226356 AbsIntWeakeningRatio, 0.4927536231884058 AbsIntAvgWeakeningVarsNumRemoved, 2.2028985507246377 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 28 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 130 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 8791 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 3/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...