./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/recHanoi03-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/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 ../sv-benchmarks/c/recursive/recHanoi03-2.c -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 887ada769b510ae5d273618525924110908f2b5f ............................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:28:26,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:28:26,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:28:26,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:28:26,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:28:26,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:28:26,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:28:26,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:28:26,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:28:26,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:28:26,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:28:26,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:28:26,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:28:26,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:28:26,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:28:26,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:28:26,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:28:26,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:28:26,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:28:26,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:28:26,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:28:26,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:28:26,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:28:26,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:28:26,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:28:26,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:28:26,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:28:26,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:28:26,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:28:26,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:28:26,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:28:26,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:28:26,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:28:26,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:28:26,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:28:26,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:28:26,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:28:26,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:28:26,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:28:26,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:28:26,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:28:26,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:28:26,976 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:28:26,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:28:26,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:28:26,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:28:26,980 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:28:26,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:28:26,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:28:26,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:28:26,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:28:26,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:28:26,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:28:26,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:28:26,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:28:26,985 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:28:26,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:28:26,985 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:28:26,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:28:26,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:28:26,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:28:26,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:28:26,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:28:26,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:28:26,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:28:26,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:28:26,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:28:26,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:28:26,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:28:26,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:28:26,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:28:26,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 887ada769b510ae5d273618525924110908f2b5f [2019-11-28 17:28:27,335 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:28:27,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:28:27,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:28:27,354 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:28:27,357 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:28:27,358 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi03-2.c [2019-11-28 17:28:27,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6252139/7e28431b7c3e4eba91f6d520648a973d/FLAG632f729f1 [2019-11-28 17:28:27,873 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:28:27,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c [2019-11-28 17:28:27,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6252139/7e28431b7c3e4eba91f6d520648a973d/FLAG632f729f1 [2019-11-28 17:28:28,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6252139/7e28431b7c3e4eba91f6d520648a973d [2019-11-28 17:28:28,240 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:28:28,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:28:28,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:28:28,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:28:28,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:28:28,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@275b90c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28, skipping insertion in model container [2019-11-28 17:28:28,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:28:28,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:28:28,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:28:28,466 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:28:28,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:28:28,492 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:28:28,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28 WrapperNode [2019-11-28 17:28:28,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:28:28,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:28:28,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:28:28,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:28:28,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:28:28,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:28:28,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:28:28,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:28:28,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (1/1) ... [2019-11-28 17:28:28,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:28:28,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:28:28,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:28:28,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:28:28,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (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 [2019-11-28 17:28:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2019-11-28 17:28:28,655 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2019-11-28 17:28:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:28:28,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:28:28,819 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:28:28,819 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:28:28,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:28 BoogieIcfgContainer [2019-11-28 17:28:28,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:28:28,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:28:28,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:28:28,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:28:28,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:28:28" (1/3) ... [2019-11-28 17:28:28,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2589f1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:28:28, skipping insertion in model container [2019-11-28 17:28:28,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:28" (2/3) ... [2019-11-28 17:28:28,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2589f1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:28:28, skipping insertion in model container [2019-11-28 17:28:28,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:28" (3/3) ... [2019-11-28 17:28:28,828 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2019-11-28 17:28:28,836 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:28:28,841 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:28:28,852 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:28:28,877 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:28:28,878 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:28:28,878 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:28:28,878 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:28:28,878 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:28:28,878 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:28:28,879 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:28:28,879 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:28:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-28 17:28:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:28:28,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:28,903 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:28,903 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:28,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2032829855, now seen corresponding path program 1 times [2019-11-28 17:28:28,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:28,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672955357] [2019-11-28 17:28:28,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:28:29,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672955357] [2019-11-28 17:28:29,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:28:29,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 17:28:29,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819532477] [2019-11-28 17:28:29,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 17:28:29,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 17:28:29,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:28:29,231 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 6 states. [2019-11-28 17:28:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:29,376 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-11-28 17:28:29,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:28:29,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-28 17:28:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:29,387 INFO L225 Difference]: With dead ends: 28 [2019-11-28 17:28:29,387 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 17:28:29,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:28:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 17:28:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 17:28:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 17:28:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-28 17:28:29,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-11-28 17:28:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:29,431 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-28 17:28:29,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 17:28:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-28 17:28:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 17:28:29,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:29,434 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:29,434 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1521841779, now seen corresponding path program 1 times [2019-11-28 17:28:29,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:29,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531474700] [2019-11-28 17:28:29,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:28:29,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531474700] [2019-11-28 17:28:29,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155854837] [2019-11-28 17:28:29,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:29,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:28:29,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:28:29,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:29,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-28 17:28:29,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504419333] [2019-11-28 17:28:29,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:28:29,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:28:29,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:28:29,939 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2019-11-28 17:28:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:30,109 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-11-28 17:28:30,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:28:30,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-11-28 17:28:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:30,111 INFO L225 Difference]: With dead ends: 22 [2019-11-28 17:28:30,111 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 17:28:30,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:28:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 17:28:30,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-28 17:28:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 17:28:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-28 17:28:30,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2019-11-28 17:28:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:30,120 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-28 17:28:30,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:28:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-28 17:28:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 17:28:30,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:30,122 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:30,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:30,328 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 166885599, now seen corresponding path program 2 times [2019-11-28 17:28:30,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:30,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049230050] [2019-11-28 17:28:30,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:28:30,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049230050] [2019-11-28 17:28:30,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698119334] [2019-11-28 17:28:30,538 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:30,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:28:30,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:28:30,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 17:28:30,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:28:30,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:30,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-28 17:28:30,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129421943] [2019-11-28 17:28:30,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 17:28:30,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:30,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 17:28:30,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:28:30,853 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 18 states. [2019-11-28 17:28:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:31,117 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-28 17:28:31,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:28:31,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-11-28 17:28:31,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:31,119 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:28:31,120 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 17:28:31,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2019-11-28 17:28:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 17:28:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-28 17:28:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 17:28:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-28 17:28:31,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2019-11-28 17:28:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:31,133 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-28 17:28:31,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 17:28:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-28 17:28:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-28 17:28:31,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:31,135 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:31,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:31,339 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:31,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1033731103, now seen corresponding path program 3 times [2019-11-28 17:28:31,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:31,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388874901] [2019-11-28 17:28:31,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 17:28:31,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388874901] [2019-11-28 17:28:31,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824475742] [2019-11-28 17:28:31,732 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:31,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-28 17:28:31,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:28:31,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 17:28:31,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 17:28:47,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:28:47,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 26 [2019-11-28 17:28:47,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251045023] [2019-11-28 17:28:47,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:28:47,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:28:47,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=575, Unknown=6, NotChecked=0, Total=650 [2019-11-28 17:28:47,161 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 14 states. [2019-11-28 17:28:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:58,488 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 17:28:58,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:28:58,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-11-28 17:28:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:58,509 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:28:58,509 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:28:58,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=69, Invalid=575, Unknown=6, NotChecked=0, Total=650 [2019-11-28 17:28:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:28:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:28:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:28:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:28:58,512 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2019-11-28 17:28:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:58,512 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:28:58,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:28:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:28:58,513 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:28:58,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:58,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:28:58,752 INFO L246 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2019-11-28 17:28:58,752 INFO L246 CegarLoopResult]: For program point hanoiEXIT(lines 16 21) no Hoare annotation was computed. [2019-11-28 17:28:58,752 INFO L249 CegarLoopResult]: At program point hanoiENTRY(lines 16 21) the Hoare annotation is: true [2019-11-28 17:28:58,752 INFO L246 CegarLoopResult]: For program point hanoiFINAL(lines 16 21) no Hoare annotation was computed. [2019-11-28 17:28:58,753 INFO L242 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2019-11-28 17:28:58,753 INFO L246 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-11-28 17:28:58,753 INFO L246 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2019-11-28 17:28:58,753 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:28:58,753 INFO L246 CegarLoopResult]: For program point L30(lines 30 34) no Hoare annotation was computed. [2019-11-28 17:28:58,753 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:28:58,753 INFO L242 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (<= ULTIMATE.start_main_~n~0 31) [2019-11-28 17:28:58,754 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:28:58,754 INFO L246 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2019-11-28 17:28:58,754 INFO L246 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2019-11-28 17:28:58,754 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 33) no Hoare annotation was computed. [2019-11-28 17:28:58,755 INFO L249 CegarLoopResult]: At program point L24(lines 24 35) the Hoare annotation is: true [2019-11-28 17:28:58,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:28:58 BoogieIcfgContainer [2019-11-28 17:28:58,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:28:58,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:28:58,764 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:28:58,765 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:28:58,765 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:28" (3/4) ... [2019-11-28 17:28:58,769 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:28:58,776 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2019-11-28 17:28:58,781 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:28:58,781 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:28:58,822 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:28:58,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:28:58,825 INFO L168 Benchmark]: Toolchain (without parser) took 30583.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 961.7 MB in the beginning and 814.3 MB in the end (delta: 147.4 MB). Peak memory consumption was 272.2 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:58,826 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:28:58,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.12 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:58,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -176.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:58,829 INFO L168 Benchmark]: Boogie Preprocessor took 22.93 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:58,830 INFO L168 Benchmark]: RCFGBuilder took 218.46 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: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:58,831 INFO L168 Benchmark]: TraceAbstraction took 29942.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 821.0 MB in the end (delta: 279.8 MB). Peak memory consumption was 279.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:58,831 INFO L168 Benchmark]: Witness Printer took 58.69 ms. Allocated memory is still 1.2 GB. Free memory was 821.0 MB in the beginning and 814.3 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:58,836 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 250.12 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 84.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -176.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.93 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 218.46 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: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 29942.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 821.0 MB in the end (delta: 279.8 MB). Peak memory consumption was 279.8 MB. Max. memory is 11.5 GB. * Witness Printer took 58.69 ms. Allocated memory is still 1.2 GB. Free memory was 821.0 MB in the beginning and 814.3 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: - PositiveResult [Line: 33]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 29.8s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 11.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 20 SDslu, 237 SDs, 0 SdLazy, 294 SolverSat, 8 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 11.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 16.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 8 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 16.8s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 147 ConstructedInterpolants, 18 QuantifiedInterpolants, 22482 SizeOfPredicates, 11 NumberOfNonLiveVariables, 179 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 96/140 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...