./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loops/string_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0ed9222f Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/loops/string_false-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77cd31699320cd40da64f32a92959020d19291bd ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/loops/string_false-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77cd31699320cd40da64f32a92959020d19291bd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-0ed9222-m [2019-01-14 17:02:16,852 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-14 17:02:16,854 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-14 17:02:16,867 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-14 17:02:16,867 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-14 17:02:16,868 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-14 17:02:16,870 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-14 17:02:16,872 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-14 17:02:16,874 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-14 17:02:16,875 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-14 17:02:16,876 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-14 17:02:16,876 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-14 17:02:16,877 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-14 17:02:16,878 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-14 17:02:16,880 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-14 17:02:16,881 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-14 17:02:16,882 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-14 17:02:16,884 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-14 17:02:16,886 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-14 17:02:16,888 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-14 17:02:16,889 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-14 17:02:16,890 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-14 17:02:16,893 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-14 17:02:16,894 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-14 17:02:16,894 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-14 17:02:16,895 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-14 17:02:16,896 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-14 17:02:16,897 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-14 17:02:16,898 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-14 17:02:16,899 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-14 17:02:16,900 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-14 17:02:16,900 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-14 17:02:16,901 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-14 17:02:16,901 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-14 17:02:16,902 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-14 17:02:16,903 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-14 17:02:16,903 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-14 17:02:16,933 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-14 17:02:16,934 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-14 17:02:16,935 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-14 17:02:16,935 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-14 17:02:16,936 INFO L133 SettingsManager]: * Use SBE=true [2019-01-14 17:02:16,936 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-14 17:02:16,936 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-14 17:02:16,936 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-14 17:02:16,936 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-14 17:02:16,937 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-14 17:02:16,937 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-14 17:02:16,937 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-14 17:02:16,937 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-14 17:02:16,937 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-14 17:02:16,937 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-14 17:02:16,938 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-14 17:02:16,938 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-14 17:02:16,938 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-14 17:02:16,938 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-14 17:02:16,938 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-14 17:02:16,938 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-14 17:02:16,939 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-14 17:02:16,939 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-14 17:02:16,939 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-14 17:02:16,939 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-14 17:02:16,939 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-14 17:02:16,940 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-14 17:02:16,940 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/UAutomizer-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 -> Automizer 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 -> 77cd31699320cd40da64f32a92959020d19291bd [2019-01-14 17:02:16,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-14 17:02:16,992 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-14 17:02:16,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-14 17:02:17,000 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-14 17:02:17,002 INFO L276 PluginConnector]: CDTParser initialized [2019-01-14 17:02:17,002 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/string_false-unreach-call_true-termination.i [2019-01-14 17:02:17,072 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da51cce4/dd3fc5b5243a48e5a471c5101d62d776/FLAG0519dd146 [2019-01-14 17:02:17,518 INFO L307 CDTParser]: Found 1 translation units. [2019-01-14 17:02:17,519 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/string_false-unreach-call_true-termination.i [2019-01-14 17:02:17,529 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da51cce4/dd3fc5b5243a48e5a471c5101d62d776/FLAG0519dd146 [2019-01-14 17:02:17,909 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da51cce4/dd3fc5b5243a48e5a471c5101d62d776 [2019-01-14 17:02:17,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-14 17:02:17,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-14 17:02:17,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-14 17:02:17,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-14 17:02:17,921 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-14 17:02:17,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 05:02:17" (1/1) ... [2019-01-14 17:02:17,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@398d0f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:17, skipping insertion in model container [2019-01-14 17:02:17,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 05:02:17" (1/1) ... [2019-01-14 17:02:17,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-14 17:02:17,954 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-14 17:02:18,177 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 17:02:18,182 INFO L191 MainTranslator]: Completed pre-run [2019-01-14 17:02:18,211 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 17:02:18,233 INFO L195 MainTranslator]: Completed translation [2019-01-14 17:02:18,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18 WrapperNode [2019-01-14 17:02:18,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-14 17:02:18,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-14 17:02:18,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-14 17:02:18,236 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-14 17:02:18,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-14 17:02:18,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-14 17:02:18,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-14 17:02:18,284 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-14 17:02:18,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... [2019-01-14 17:02:18,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-14 17:02:18,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-14 17:02:18,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-14 17:02:18,321 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-14 17:02:18,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-01-14 17:02:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-14 17:02:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-14 17:02:18,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-14 17:02:18,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-14 17:02:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-01-14 17:02:18,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-01-14 17:02:18,986 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-14 17:02:18,987 INFO L286 CfgBuilder]: Removed 11 assue(true) statements. [2019-01-14 17:02:18,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:02:18 BoogieIcfgContainer [2019-01-14 17:02:18,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-14 17:02:18,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-14 17:02:18,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-14 17:02:18,993 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-14 17:02:18,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.01 05:02:17" (1/3) ... [2019-01-14 17:02:18,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409ce1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 05:02:18, skipping insertion in model container [2019-01-14 17:02:18,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:18" (2/3) ... [2019-01-14 17:02:18,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409ce1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 05:02:18, skipping insertion in model container [2019-01-14 17:02:18,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:02:18" (3/3) ... [2019-01-14 17:02:18,996 INFO L112 eAbstractionObserver]: Analyzing ICFG string_false-unreach-call_true-termination.i [2019-01-14 17:02:19,006 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-14 17:02:19,015 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-14 17:02:19,032 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-14 17:02:19,063 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-14 17:02:19,063 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-14 17:02:19,064 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-14 17:02:19,064 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-14 17:02:19,064 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-14 17:02:19,064 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-14 17:02:19,064 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-14 17:02:19,065 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-14 17:02:19,065 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-14 17:02:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-01-14 17:02:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-01-14 17:02:19,088 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:19,089 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:19,091 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2019-01-14 17:02:19,099 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:02:19,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:02:19,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:19,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:19,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:02:19,223 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 17:02:19,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 17:02:19,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-14 17:02:19,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-14 17:02:19,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-14 17:02:19,242 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-01-14 17:02:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:19,262 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2019-01-14 17:02:19,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-14 17:02:19,263 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-01-14 17:02:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:19,274 INFO L225 Difference]: With dead ends: 48 [2019-01-14 17:02:19,274 INFO L226 Difference]: Without dead ends: 22 [2019-01-14 17:02:19,277 INFO L631 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 [2019-01-14 17:02:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-01-14 17:02:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-01-14 17:02:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-01-14 17:02:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-01-14 17:02:19,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2019-01-14 17:02:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:19,315 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-01-14 17:02:19,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-14 17:02:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-01-14 17:02:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-01-14 17:02:19,316 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:19,316 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:19,317 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2019-01-14 17:02:19,317 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:02:19,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:02:19,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:19,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:19,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:02:19,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 17:02:19,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-14 17:02:19,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-14 17:02:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-14 17:02:19,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-14 17:02:19,404 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 3 states. [2019-01-14 17:02:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:19,580 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-01-14 17:02:19,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-14 17:02:19,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-01-14 17:02:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:19,583 INFO L225 Difference]: With dead ends: 50 [2019-01-14 17:02:19,583 INFO L226 Difference]: Without dead ends: 32 [2019-01-14 17:02:19,584 INFO L631 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 [2019-01-14 17:02:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-14 17:02:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2019-01-14 17:02:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-14 17:02:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-01-14 17:02:19,591 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2019-01-14 17:02:19,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:19,591 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-01-14 17:02:19,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-14 17:02:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-01-14 17:02:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-01-14 17:02:19,592 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:19,592 INFO L402 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] [2019-01-14 17:02:19,593 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2019-01-14 17:02:19,593 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:02:19,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:02:19,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:19,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:19,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-14 17:02:19,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 17:02:19,700 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-01-14 17:02:19,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:19,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-14 17:02:19,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 17:02:19,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-01-14 17:02:19,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-14 17:02:19,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-14 17:02:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-01-14 17:02:19,868 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2019-01-14 17:02:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:20,175 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2019-01-14 17:02:20,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-14 17:02:20,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-01-14 17:02:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:20,177 INFO L225 Difference]: With dead ends: 61 [2019-01-14 17:02:20,177 INFO L226 Difference]: Without dead ends: 42 [2019-01-14 17:02:20,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-01-14 17:02:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-01-14 17:02:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2019-01-14 17:02:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-01-14 17:02:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-01-14 17:02:20,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2019-01-14 17:02:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:20,184 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-01-14 17:02:20,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-14 17:02:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-01-14 17:02:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-01-14 17:02:20,186 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:20,186 INFO L402 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] [2019-01-14 17:02:20,186 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:20,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1590720246, now seen corresponding path program 2 times [2019-01-14 17:02:20,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:02:20,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:02:20,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:20,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:20,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-01-14 17:02:20,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 17:02:20,315 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-14 17:02:20,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-01-14 17:02:20,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-01-14 17:02:20,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-14 17:02:20,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-01-14 17:02:20,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 17:02:20,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-01-14 17:02:20,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-14 17:02:20,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-14 17:02:20,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-01-14 17:02:20,447 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2019-01-14 17:02:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:20,664 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2019-01-14 17:02:20,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-14 17:02:20,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-01-14 17:02:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:20,665 INFO L225 Difference]: With dead ends: 73 [2019-01-14 17:02:20,665 INFO L226 Difference]: Without dead ends: 52 [2019-01-14 17:02:20,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-01-14 17:02:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-14 17:02:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2019-01-14 17:02:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-14 17:02:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-01-14 17:02:20,672 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 26 [2019-01-14 17:02:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:20,672 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-01-14 17:02:20,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-14 17:02:20,673 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-01-14 17:02:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-01-14 17:02:20,674 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:20,674 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:20,674 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:20,675 INFO L82 PathProgramCache]: Analyzing trace with hash -381068522, now seen corresponding path program 3 times [2019-01-14 17:02:20,675 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:02:20,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:02:20,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:20,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 17:02:20,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-01-14 17:02:20,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 17:02:20,814 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-01-14 17:02:20,825 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-14 17:02:20,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-01-14 17:02:20,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-14 17:02:20,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-01-14 17:02:20,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 17:02:20,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-01-14 17:02:20,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-14 17:02:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-14 17:02:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-01-14 17:02:20,918 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-01-14 17:02:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:21,367 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-01-14 17:02:21,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-14 17:02:21,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-01-14 17:02:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:21,368 INFO L225 Difference]: With dead ends: 85 [2019-01-14 17:02:21,368 INFO L226 Difference]: Without dead ends: 62 [2019-01-14 17:02:21,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-01-14 17:02:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-01-14 17:02:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2019-01-14 17:02:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-14 17:02:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-01-14 17:02:21,375 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2019-01-14 17:02:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:21,376 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-01-14 17:02:21,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-14 17:02:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-01-14 17:02:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-01-14 17:02:21,377 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:21,377 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:21,377 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:21,378 INFO L82 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 4 times [2019-01-14 17:02:21,378 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:02:21,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:02:21,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:21,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 17:02:21,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-01-14 17:02:21,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-14 17:02:21,507 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-14 17:02:21,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-01-14 17:02:21,562 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-01-14 17:02:21,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-14 17:02:21,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-01-14 17:02:21,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 17:02:21,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-01-14 17:02:21,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-14 17:02:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-14 17:02:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-01-14 17:02:21,625 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2019-01-14 17:02:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:22,040 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2019-01-14 17:02:22,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-14 17:02:22,041 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2019-01-14 17:02:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:22,042 INFO L225 Difference]: With dead ends: 95 [2019-01-14 17:02:22,042 INFO L226 Difference]: Without dead ends: 70 [2019-01-14 17:02:22,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-01-14 17:02:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-14 17:02:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2019-01-14 17:02:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-01-14 17:02:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-01-14 17:02:22,052 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2019-01-14 17:02:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:22,055 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-01-14 17:02:22,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-14 17:02:22,055 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-01-14 17:02:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-01-14 17:02:22,057 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:22,057 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:22,058 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash -270804906, now seen corresponding path program 5 times [2019-01-14 17:02:22,062 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 17:02:22,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 17:02:22,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:22,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 17:02:22,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 17:02:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 17:02:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 17:02:22,328 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-14 17:02:22,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.01 05:02:22 BoogieIcfgContainer [2019-01-14 17:02:22,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-14 17:02:22,371 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-14 17:02:22,371 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-14 17:02:22,373 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-14 17:02:22,373 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:02:18" (3/4) ... [2019-01-14 17:02:22,378 INFO L147 WitnessPrinter]: No result that supports witness generation found [2019-01-14 17:02:22,378 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-14 17:02:22,379 INFO L168 Benchmark]: Toolchain (without parser) took 4464.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 67.1 MB). Free memory was 951.3 MB in the beginning and 877.9 MB in the end (delta: 73.5 MB). Peak memory consumption was 140.6 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:22,381 INFO L168 Benchmark]: CDTParser took 1.24 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 17:02:22,382 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.15 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:22,383 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.69 ms. Allocated memory is still 1.0 GB. Free memory was 940.6 MB in the beginning and 935.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:22,384 INFO L168 Benchmark]: Boogie Preprocessor took 36.66 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 17:02:22,385 INFO L168 Benchmark]: RCFGBuilder took 667.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 67.1 MB). Free memory was 935.2 MB in the beginning and 1.0 GB in the end (delta: -92.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:22,387 INFO L168 Benchmark]: TraceAbstraction took 3381.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 877.9 MB in the end (delta: 150.0 MB). Peak memory consumption was 150.0 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:22,388 INFO L168 Benchmark]: Witness Printer took 6.61 ms. Allocated memory is still 1.1 GB. Free memory is still 877.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 17:02:22,393 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.24 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 318.15 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 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 47.69 ms. Allocated memory is still 1.0 GB. Free memory was 940.6 MB in the beginning and 935.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 36.66 ms. Allocated memory is still 1.0 GB. Free memory is still 935.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 667.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 67.1 MB). Free memory was 935.2 MB in the beginning and 1.0 GB in the end (delta: -92.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3381.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 877.9 MB in the end (delta: 150.0 MB). Peak memory consumption was 150.0 MB. Max. memory is 11.5 GB. * Witness Printer took 6.61 ms. Allocated memory is still 1.1 GB. Free memory is still 877.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 55. Possible FailurePath: [L17] char string_A[5], string_B[5]; [L18] int i, j, nc_A, nc_B, found=0; [L21] i=0 [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND FALSE !(i<5) [L23] EXPR string_A[5 -1] [L23] COND FALSE !(!(string_A[5 -1]=='\0')) [L25] i=0 [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND FALSE !(i<5) [L27] EXPR string_B[5 -1] [L27] COND FALSE !(!(string_B[5 -1]=='\0')) [L29] nc_A = 0 [L30] EXPR string_A[nc_A] [L30] COND FALSE !(string_A[nc_A]!='\0') [L33] nc_B = 0 [L34] EXPR string_B[nc_B] [L34] COND FALSE !(string_B[nc_B]!='\0') [L37] COND FALSE !(!(nc_B >= nc_A)) [L40] EXPR j=0 [L40] i=j=0 [L41] COND FALSE !((inc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 -> Automizer 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 -> 77cd31699320cd40da64f32a92959020d19291bd [2019-01-14 17:02:24,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-14 17:02:24,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-14 17:02:24,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-14 17:02:24,814 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-14 17:02:24,815 INFO L276 PluginConnector]: CDTParser initialized [2019-01-14 17:02:24,816 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/string_false-unreach-call_true-termination.i [2019-01-14 17:02:24,884 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f9f81e/0a4efc27efce4b8da1dd0c710cbb0213/FLAG880d58489 [2019-01-14 17:02:25,298 INFO L307 CDTParser]: Found 1 translation units. [2019-01-14 17:02:25,299 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/string_false-unreach-call_true-termination.i [2019-01-14 17:02:25,306 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f9f81e/0a4efc27efce4b8da1dd0c710cbb0213/FLAG880d58489 [2019-01-14 17:02:25,702 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f9f81e/0a4efc27efce4b8da1dd0c710cbb0213 [2019-01-14 17:02:25,709 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-14 17:02:25,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-14 17:02:25,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-14 17:02:25,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-14 17:02:25,716 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-14 17:02:25,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 05:02:25" (1/1) ... [2019-01-14 17:02:25,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c23ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:25, skipping insertion in model container [2019-01-14 17:02:25,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 05:02:25" (1/1) ... [2019-01-14 17:02:25,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-14 17:02:25,749 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-14 17:02:25,961 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 17:02:25,969 INFO L191 MainTranslator]: Completed pre-run [2019-01-14 17:02:26,003 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 17:02:26,025 INFO L195 MainTranslator]: Completed translation [2019-01-14 17:02:26,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26 WrapperNode [2019-01-14 17:02:26,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-14 17:02:26,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-14 17:02:26,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-14 17:02:26,027 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-14 17:02:26,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-14 17:02:26,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-14 17:02:26,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-14 17:02:26,074 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-14 17:02:26,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... [2019-01-14 17:02:26,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-14 17:02:26,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-14 17:02:26,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-14 17:02:26,174 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-14 17:02:26,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-01-14 17:02:26,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-01-14 17:02:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-14 17:02:26,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-14 17:02:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-01-14 17:02:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-01-14 17:02:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-01-14 17:02:26,827 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-14 17:02:26,827 INFO L286 CfgBuilder]: Removed 11 assue(true) statements. [2019-01-14 17:02:26,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:02:26 BoogieIcfgContainer [2019-01-14 17:02:26,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-14 17:02:26,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-14 17:02:26,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-14 17:02:26,834 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-14 17:02:26,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.01 05:02:25" (1/3) ... [2019-01-14 17:02:26,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb5f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 05:02:26, skipping insertion in model container [2019-01-14 17:02:26,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 05:02:26" (2/3) ... [2019-01-14 17:02:26,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb5f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 05:02:26, skipping insertion in model container [2019-01-14 17:02:26,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:02:26" (3/3) ... [2019-01-14 17:02:26,840 INFO L112 eAbstractionObserver]: Analyzing ICFG string_false-unreach-call_true-termination.i [2019-01-14 17:02:26,850 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-14 17:02:26,863 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-14 17:02:26,884 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-14 17:02:26,927 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-14 17:02:26,928 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-14 17:02:26,929 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-14 17:02:26,929 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-14 17:02:26,930 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-14 17:02:26,930 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-14 17:02:26,930 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-14 17:02:26,930 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-14 17:02:26,931 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-14 17:02:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-01-14 17:02:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-01-14 17:02:26,957 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:26,958 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:26,961 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2019-01-14 17:02:26,974 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2019-01-14 17:02:26,974 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-01-14 17:02:27,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:27,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:02:27,090 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [MP cvc4 --incremental --print-success --lang smt --rewrite-divk (2)] Exception during sending of exit command (exit): Broken pipe [2019-01-14 17:02:27,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 17:02:27,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 17:02:27,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-14 17:02:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-14 17:02:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-14 17:02:27,124 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-01-14 17:02:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:27,148 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2019-01-14 17:02:27,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-14 17:02:27,150 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-01-14 17:02:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:27,164 INFO L225 Difference]: With dead ends: 48 [2019-01-14 17:02:27,164 INFO L226 Difference]: Without dead ends: 22 [2019-01-14 17:02:27,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-14 17:02:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-01-14 17:02:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-01-14 17:02:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-01-14 17:02:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-01-14 17:02:27,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2019-01-14 17:02:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:27,215 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-01-14 17:02:27,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-14 17:02:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-01-14 17:02:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-01-14 17:02:27,216 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:27,216 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:27,217 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2019-01-14 17:02:27,218 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2019-01-14 17:02:27,218 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-01-14 17:02:27,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:27,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 17:02:27,342 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [MP cvc4 --incremental --print-success --lang smt --rewrite-divk (3)] Exception during sending of exit command (exit): Broken pipe [2019-01-14 17:02:27,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 17:02:27,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-14 17:02:27,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-14 17:02:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-14 17:02:27,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-14 17:02:27,354 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 3 states. [2019-01-14 17:02:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:27,620 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-01-14 17:02:27,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-14 17:02:27,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-01-14 17:02:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:27,623 INFO L225 Difference]: With dead ends: 50 [2019-01-14 17:02:27,624 INFO L226 Difference]: Without dead ends: 32 [2019-01-14 17:02:27,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-14 17:02:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-14 17:02:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2019-01-14 17:02:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-01-14 17:02:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-01-14 17:02:27,632 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2019-01-14 17:02:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:27,632 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-01-14 17:02:27,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-14 17:02:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-01-14 17:02:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-01-14 17:02:27,634 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:27,634 INFO L402 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] [2019-01-14 17:02:27,635 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2019-01-14 17:02:27,636 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2019-01-14 17:02:27,637 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-01-14 17:02:27,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:27,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-14 17:02:27,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-14 17:02:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-14 17:02:27,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 17:02:27,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-01-14 17:02:27,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-14 17:02:27,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-14 17:02:27,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-01-14 17:02:27,879 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2019-01-14 17:02:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:28,370 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2019-01-14 17:02:28,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-14 17:02:28,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-01-14 17:02:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:28,373 INFO L225 Difference]: With dead ends: 79 [2019-01-14 17:02:28,373 INFO L226 Difference]: Without dead ends: 60 [2019-01-14 17:02:28,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-14 17:02:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-14 17:02:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2019-01-14 17:02:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-14 17:02:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-01-14 17:02:28,384 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2019-01-14 17:02:28,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:28,384 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-01-14 17:02:28,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-14 17:02:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-01-14 17:02:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-01-14 17:02:28,386 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:28,386 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:28,386 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:28,388 INFO L82 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 2 times [2019-01-14 17:02:28,389 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2019-01-14 17:02:28,389 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-01-14 17:02:28,406 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2019-01-14 17:02:28,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-01-14 17:02:28,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-14 17:02:28,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-01-14 17:02:28,536 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2019-01-14 17:02:28,541 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 17:02:28,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-01-14 17:02:28,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-14 17:02:28,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-14 17:02:28,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-01-14 17:02:28,543 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2019-01-14 17:02:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:28,961 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2019-01-14 17:02:28,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-14 17:02:28,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-01-14 17:02:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:28,963 INFO L225 Difference]: With dead ends: 48 [2019-01-14 17:02:28,964 INFO L226 Difference]: Without dead ends: 38 [2019-01-14 17:02:28,964 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-01-14 17:02:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-01-14 17:02:28,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-01-14 17:02:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-14 17:02:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-01-14 17:02:28,971 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2019-01-14 17:02:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:28,972 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-01-14 17:02:28,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-14 17:02:28,972 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-01-14 17:02:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-01-14 17:02:28,974 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:28,974 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:28,975 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1829932657, now seen corresponding path program 1 times [2019-01-14 17:02:28,976 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2019-01-14 17:02:28,976 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-01-14 17:02:28,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 17:02:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:29,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-01-14 17:02:29,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-14 17:02:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-01-14 17:02:29,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-14 17:02:29,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-01-14 17:02:29,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-14 17:02:29,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-14 17:02:29,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-01-14 17:02:29,583 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 12 states. [2019-01-14 17:02:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:30,615 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2019-01-14 17:02:30,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-14 17:02:30,619 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-01-14 17:02:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:30,621 INFO L225 Difference]: With dead ends: 101 [2019-01-14 17:02:30,621 INFO L226 Difference]: Without dead ends: 74 [2019-01-14 17:02:30,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-01-14 17:02:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-01-14 17:02:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2019-01-14 17:02:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-01-14 17:02:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2019-01-14 17:02:30,642 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2019-01-14 17:02:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:30,643 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2019-01-14 17:02:30,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-14 17:02:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2019-01-14 17:02:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-01-14 17:02:30,645 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:30,646 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:30,647 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:30,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:30,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1782806673, now seen corresponding path program 2 times [2019-01-14 17:02:30,647 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2019-01-14 17:02:30,649 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-01-14 17:02:30,686 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2019-01-14 17:02:30,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-01-14 17:02:30,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-14 17:02:30,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-01-14 17:02:30,979 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2019-01-14 17:02:30,982 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 17:02:30,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-01-14 17:02:30,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-14 17:02:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-14 17:02:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-14 17:02:30,984 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 4 states. [2019-01-14 17:02:31,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:31,103 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-01-14 17:02:31,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-14 17:02:31,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-01-14 17:02:31,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:31,105 INFO L225 Difference]: With dead ends: 48 [2019-01-14 17:02:31,109 INFO L226 Difference]: Without dead ends: 44 [2019-01-14 17:02:31,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-14 17:02:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-01-14 17:02:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-01-14 17:02:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-14 17:02:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-01-14 17:02:31,121 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2019-01-14 17:02:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:31,124 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-01-14 17:02:31,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-14 17:02:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-01-14 17:02:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-01-14 17:02:31,126 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:31,126 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:31,126 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:31,129 INFO L82 PathProgramCache]: Analyzing trace with hash -364393356, now seen corresponding path program 1 times [2019-01-14 17:02:31,130 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2019-01-14 17:02:31,130 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-01-14 17:02:31,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-14 17:02:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 17:02:31,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-14 17:02:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-01-14 17:02:31,348 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [MP cvc4 --incremental --print-success --lang smt --rewrite-divk (8)] Exception during sending of exit command (exit): Stream closed [2019-01-14 17:02:31,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 17:02:31,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-01-14 17:02:31,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-14 17:02:31,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-14 17:02:31,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-14 17:02:31,357 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 4 states. [2019-01-14 17:02:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 17:02:31,484 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-01-14 17:02:31,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-14 17:02:31,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-01-14 17:02:31,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 17:02:31,487 INFO L225 Difference]: With dead ends: 58 [2019-01-14 17:02:31,487 INFO L226 Difference]: Without dead ends: 45 [2019-01-14 17:02:31,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-14 17:02:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-01-14 17:02:31,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-01-14 17:02:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-01-14 17:02:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2019-01-14 17:02:31,494 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 42 [2019-01-14 17:02:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 17:02:31,495 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2019-01-14 17:02:31,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-14 17:02:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2019-01-14 17:02:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-01-14 17:02:31,497 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 17:02:31,497 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 17:02:31,497 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 17:02:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 17:02:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash -512239655, now seen corresponding path program 1 times [2019-01-14 17:02:31,498 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2019-01-14 17:02:31,498 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-01-14 17:02:31,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 17:02:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 17:02:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 17:02:32,420 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-14 17:02:32,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.01 05:02:32 BoogieIcfgContainer [2019-01-14 17:02:32,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-14 17:02:32,521 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-14 17:02:32,522 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-14 17:02:32,522 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-14 17:02:32,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 05:02:26" (3/4) ... [2019-01-14 17:02:32,528 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-14 17:02:32,643 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-14 17:02:32,644 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-14 17:02:32,645 INFO L168 Benchmark]: Toolchain (without parser) took 6935.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 948.7 MB in the beginning and 883.8 MB in the end (delta: 64.9 MB). Peak memory consumption was 202.3 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:32,647 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 17:02:32,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.31 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:32,648 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.74 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:32,650 INFO L168 Benchmark]: Boogie Preprocessor took 99.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -193.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:32,652 INFO L168 Benchmark]: RCFGBuilder took 655.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:32,652 INFO L168 Benchmark]: TraceAbstraction took 5691.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 890.4 MB in the end (delta: 211.0 MB). Peak memory consumption was 211.0 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:32,653 INFO L168 Benchmark]: Witness Printer took 122.20 ms. Allocated memory is still 1.2 GB. Free memory was 890.4 MB in the beginning and 883.8 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-01-14 17:02:32,659 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.31 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 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 46.74 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 99.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -193.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 655.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5691.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 890.4 MB in the end (delta: 211.0 MB). Peak memory consumption was 211.0 MB. Max. memory is 11.5 GB. * Witness Printer took 122.20 ms. Allocated memory is still 1.2 GB. Free memory was 890.4 MB in the beginning and 883.8 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] char string_A[5], string_B[5]; [L18] int i, j, nc_A, nc_B, found=0; [L21] i=0 [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ [L21] COND FALSE !(i<5) [L23] EXPR string_A[5 -1] [L23] COND FALSE !(!(string_A[5 -1]=='\0')) [L25] i=0 [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ [L25] COND FALSE !(i<5) [L27] EXPR string_B[5 -1] [L27] COND FALSE !(!(string_B[5 -1]=='\0')) [L29] nc_A = 0 [L30] EXPR string_A[nc_A] [L30] COND TRUE string_A[nc_A]!='\0' [L31] nc_A++ [L30] EXPR string_A[nc_A] [L30] COND FALSE !(string_A[nc_A]!='\0') [L33] nc_B = 0 [L34] EXPR string_B[nc_B] [L34] COND TRUE string_B[nc_B]!='\0' [L35] nc_B++ [L34] EXPR string_B[nc_B] [L34] COND FALSE !(string_B[nc_B]!='\0') [L37] COND FALSE !(!(nc_B >= nc_A)) [L40] EXPR j=0 [L40] i=j=0 [L41] COND TRUE (inc_B-1)<