./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/recHanoi02-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab 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/recHanoi02-2.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 f48e7b9931723f1165b5bb8f3d86571b9aa1aa14 ..................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 00:24:15,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:24:15,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:24:15,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:24:15,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:24:15,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:24:15,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:24:15,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:24:15,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:24:15,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:24:15,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:24:15,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:24:15,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:24:15,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:24:15,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:24:15,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:24:15,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:24:15,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:24:15,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:24:15,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:24:15,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:24:15,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:24:15,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:24:15,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:24:15,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:24:15,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:24:15,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:24:15,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:24:15,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:24:15,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:24:15,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:24:15,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:24:15,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:24:15,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:24:15,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:24:15,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:24:15,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:24:15,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:24:15,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:24:15,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:24:15,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:24:15,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:24:15,879 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:24:15,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:24:15,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:24:15,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:24:15,885 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:24:15,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:24:15,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:24:15,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:24:15,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:24:15,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:24:15,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:24:15,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:24:15,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:24:15,889 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:24:15,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:24:15,890 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:24:15,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:24:15,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:24:15,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:24:15,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:24:15,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:24:15,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:24:15,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:24:15,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:24:15,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:24:15,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:24:15,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:24:15,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:24:15,894 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 -> f48e7b9931723f1165b5bb8f3d86571b9aa1aa14 [2019-11-28 00:24:16,221 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:24:16,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:24:16,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:24:16,248 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:24:16,249 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:24:16,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi02-2.c [2019-11-28 00:24:16,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a83adb7dd/db2a008ec2ea4daa83ff907dac0c048d/FLAG52d4a863c [2019-11-28 00:24:16,814 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:24:16,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi02-2.c [2019-11-28 00:24:16,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a83adb7dd/db2a008ec2ea4daa83ff907dac0c048d/FLAG52d4a863c [2019-11-28 00:24:17,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a83adb7dd/db2a008ec2ea4daa83ff907dac0c048d [2019-11-28 00:24:17,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:24:17,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:24:17,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:24:17,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:24:17,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:24:17,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21aba202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17, skipping insertion in model container [2019-11-28 00:24:17,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:24:17,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:24:17,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:24:17,426 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:24:17,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:24:17,454 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:24:17,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17 WrapperNode [2019-11-28 00:24:17,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:24:17,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:24:17,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:24:17,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:24:17,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:24:17,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:24:17,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:24:17,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:24:17,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (1/1) ... [2019-11-28 00:24:17,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:24:17,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:24:17,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:24:17,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:24:17,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (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 00:24:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2019-11-28 00:24:17,622 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2019-11-28 00:24:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:24:17,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:24:17,772 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:24:17,773 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:24:17,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:17 BoogieIcfgContainer [2019-11-28 00:24:17,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:24:17,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:24:17,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:24:17,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:24:17,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:24:17" (1/3) ... [2019-11-28 00:24:17,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b1db2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:24:17, skipping insertion in model container [2019-11-28 00:24:17,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:17" (2/3) ... [2019-11-28 00:24:17,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b1db2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:24:17, skipping insertion in model container [2019-11-28 00:24:17,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:17" (3/3) ... [2019-11-28 00:24:17,781 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2019-11-28 00:24:17,790 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:24:17,796 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:24:17,808 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:24:17,833 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:24:17,833 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:24:17,833 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:24:17,833 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:24:17,833 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:24:17,834 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:24:17,834 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:24:17,834 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:24:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-28 00:24:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 00:24:17,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:17,854 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:17,854 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2032829855, now seen corresponding path program 1 times [2019-11-28 00:24:17,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:17,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339444560] [2019-11-28 00:24:17,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:18,227 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 00:24:18,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339444560] [2019-11-28 00:24:18,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:24:18,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 00:24:18,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656714175] [2019-11-28 00:24:18,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 00:24:18,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 00:24:18,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 00:24:18,255 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 6 states. [2019-11-28 00:24:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:18,371 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-28 00:24:18,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 00:24:18,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-28 00:24:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:18,384 INFO L225 Difference]: With dead ends: 31 [2019-11-28 00:24:18,384 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 00:24:18,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:24:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 00:24:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 00:24:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 00:24:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-28 00:24:18,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-11-28 00:24:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:18,432 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-28 00:24:18,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 00:24:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-28 00:24:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 00:24:18,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:18,435 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:18,435 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:18,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1521841779, now seen corresponding path program 1 times [2019-11-28 00:24:18,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:18,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618817192] [2019-11-28 00:24:18,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:18,578 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 00:24:18,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618817192] [2019-11-28 00:24:18,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998843520] [2019-11-28 00:24:18,579 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 00:24:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:18,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:24:18,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:24:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:24:18,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 00:24:18,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2019-11-28 00:24:18,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480162708] [2019-11-28 00:24:18,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 00:24:18,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:18,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 00:24:18,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-28 00:24:18,726 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2019-11-28 00:24:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:18,751 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-28 00:24:18,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:24:18,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-28 00:24:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:18,754 INFO L225 Difference]: With dead ends: 15 [2019-11-28 00:24:18,754 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 00:24:18,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-28 00:24:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 00:24:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 00:24:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 00:24:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 00:24:18,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-11-28 00:24:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:18,758 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 00:24:18,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 00:24:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 00:24:18,758 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 00:24:18,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:18,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 00:24:18,981 INFO L246 CegarLoopResult]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2019-11-28 00:24:18,981 INFO L249 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2019-11-28 00:24:18,982 INFO L246 CegarLoopResult]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2019-11-28 00:24:18,982 INFO L249 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2019-11-28 00:24:18,982 INFO L246 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2019-11-28 00:24:18,982 INFO L246 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2019-11-28 00:24:18,982 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 00:24:18,982 INFO L246 CegarLoopResult]: For program point L32(lines 32 36) no Hoare annotation was computed. [2019-11-28 00:24:18,983 INFO L242 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (<= 1 ULTIMATE.start_main_~n~0) [2019-11-28 00:24:18,983 INFO L246 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2019-11-28 00:24:18,983 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 00:24:18,983 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 00:24:18,984 INFO L246 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2019-11-28 00:24:18,984 INFO L249 CegarLoopResult]: At program point L26(lines 26 37) the Hoare annotation is: true [2019-11-28 00:24:18,984 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2019-11-28 00:24:18,984 INFO L246 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2019-11-28 00:24:18,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:24:18 BoogieIcfgContainer [2019-11-28 00:24:18,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:24:18,996 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:24:18,996 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:24:18,996 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:24:18,997 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:17" (3/4) ... [2019-11-28 00:24:19,001 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 00:24:19,009 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2019-11-28 00:24:19,014 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 00:24:19,015 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 00:24:19,061 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:24:19,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:24:19,064 INFO L168 Benchmark]: Toolchain (without parser) took 1839.95 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.2 MB). Free memory was 959.0 MB in the beginning and 994.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 44.5 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:19,065 INFO L168 Benchmark]: CDTParser took 0.24 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 00:24:19,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.41 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 946.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:19,067 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -129.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:19,067 INFO L168 Benchmark]: Boogie Preprocessor took 17.24 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:24:19,068 INFO L168 Benchmark]: RCFGBuilder took 215.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:19,069 INFO L168 Benchmark]: TraceAbstraction took 1220.43 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 54.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:19,069 INFO L168 Benchmark]: Witness Printer took 65.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 994.8 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:19,073 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 230.41 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 946.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 85.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 80.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -129.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.24 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 215.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1220.43 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 54.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 11.5 GB. * Witness Printer took 65.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 994.8 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: 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: 26]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 12 SDslu, 100 SDs, 0 SdLazy, 25 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 9 NumberOfFragments, 6 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 1041 SizeOfPredicates, 1 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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...