./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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/bitvector-regression/recHanoi03-1.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ccf0fb82c260d93e0a183861fdeec7e448b86af ...................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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/bitvector-regression/recHanoi03-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ccf0fb82c260d93e0a183861fdeec7e448b86af ................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 22:22:51,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:22:51,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:22:51,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:22:51,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:22:51,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:22:51,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:22:51,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:22:51,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:22:51,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:22:51,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:22:51,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:22:51,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:22:51,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:22:51,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:22:51,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:22:51,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:22:51,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:22:51,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:22:51,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:22:51,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:22:51,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:22:51,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:22:51,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:22:51,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:22:51,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:22:51,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:22:51,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:22:51,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:22:51,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:22:51,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:22:51,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:22:51,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:22:51,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:22:51,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:22:51,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:22:51,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:22:51,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:22:51,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:22:51,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:22:51,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:22:51,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:22:51,253 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:22:51,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:22:51,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:22:51,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:22:51,256 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:22:51,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:22:51,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:22:51,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:22:51,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:22:51,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:22:51,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:22:51,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:22:51,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:22:51,259 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:22:51,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:22:51,260 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:22:51,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:22:51,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:22:51,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:22:51,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:22:51,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:22:51,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:22:51,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:22:51,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:22:51,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:22:51,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:22:51,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:22:51,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:22:51,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:22:51,263 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(reach_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 -> 6ccf0fb82c260d93e0a183861fdeec7e448b86af [2020-10-19 22:22:51,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:22:51,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:22:51,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:22:51,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:22:51,469 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:22:51,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2020-10-19 22:22:51,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6421125/f4b01369815246d0baae6d7bb43c3380/FLAG12b61f4f7 [2020-10-19 22:22:52,020 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:22:52,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2020-10-19 22:22:52,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6421125/f4b01369815246d0baae6d7bb43c3380/FLAG12b61f4f7 [2020-10-19 22:22:52,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6421125/f4b01369815246d0baae6d7bb43c3380 [2020-10-19 22:22:52,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:22:52,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:22:52,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:22:52,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:22:52,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:22:52,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@322af429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52, skipping insertion in model container [2020-10-19 22:22:52,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:22:52,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:22:52,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:22:52,733 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:22:52,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:22:52,761 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:22:52,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52 WrapperNode [2020-10-19 22:22:52,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:22:52,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:22:52,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:22:52,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:22:52,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:22:52,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:22:52,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:22:52,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:22:52,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (1/1) ... [2020-10-19 22:22:52,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:22:52,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:22:52,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:22:52,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:22:52,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (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 [2020-10-19 22:22:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-10-19 22:22:52,887 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-10-19 22:22:52,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:22:52,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:22:52,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:22:52,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:22:53,106 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:22:53,106 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 22:22:53,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:22:53 BoogieIcfgContainer [2020-10-19 22:22:53,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:22:53,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:22:53,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:22:53,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:22:53,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:22:52" (1/3) ... [2020-10-19 22:22:53,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ca4efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:22:53, skipping insertion in model container [2020-10-19 22:22:53,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:52" (2/3) ... [2020-10-19 22:22:53,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ca4efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:22:53, skipping insertion in model container [2020-10-19 22:22:53,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:22:53" (3/3) ... [2020-10-19 22:22:53,118 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2020-10-19 22:22:53,132 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:22:53,140 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:22:53,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:22:53,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:22:53,194 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:22:53,195 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:22:53,195 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:22:53,195 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:22:53,195 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:22:53,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:22:53,196 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:22:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-19 22:22:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:22:53,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:22:53,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:22:53,231 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:22:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:22:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1397741056, now seen corresponding path program 1 times [2020-10-19 22:22:53,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:22:53,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59077512] [2020-10-19 22:22:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:22:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:22:53,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:22:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:22:53,510 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:22:53,541 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:22:53,542 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:22:53,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:22:53,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:22:53 BoogieIcfgContainer [2020-10-19 22:22:53,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:22:53,575 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:22:53,575 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:22:53,575 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:22:53,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:22:53" (3/4) ... [2020-10-19 22:22:53,580 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 22:22:53,580 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:22:53,583 INFO L168 Benchmark]: Toolchain (without parser) took 1161.35 ms. Allocated memory was 35.1 MB in the beginning and 45.6 MB in the end (delta: 10.5 MB). Free memory was 15.0 MB in the beginning and 21.2 MB in the end (delta: -6.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:22:53,585 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 33.6 MB. Free memory was 9.1 MB in the beginning and 9.0 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. [2020-10-19 22:22:53,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.70 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 14.1 MB in the beginning and 25.4 MB in the end (delta: -11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:22:53,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.84 ms. Allocated memory is still 44.0 MB. Free memory was 25.4 MB in the beginning and 23.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:22:53,588 INFO L168 Benchmark]: Boogie Preprocessor took 18.99 ms. Allocated memory is still 44.0 MB. Free memory was 23.8 MB in the beginning and 22.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:22:53,589 INFO L168 Benchmark]: RCFGBuilder took 293.66 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 22.5 MB in the beginning and 21.8 MB in the end (delta: 691.9 kB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:22:53,590 INFO L168 Benchmark]: TraceAbstraction took 463.84 ms. Allocated memory is still 45.6 MB. Free memory was 21.3 MB in the beginning and 21.7 MB in the end (delta: -394.5 kB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:22:53,591 INFO L168 Benchmark]: Witness Printer took 5.40 ms. Allocated memory is still 45.6 MB. Free memory was 21.5 MB in the beginning and 21.2 MB in the end (delta: 286.2 kB). Peak memory consumption was 286.2 kB. Max. memory is 14.3 GB. [2020-10-19 22:22:53,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 33.6 MB. Free memory was 9.1 MB in the beginning and 9.0 MB in the end (delta: 45.5 kB). Peak memory consumption was 45.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 335.70 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 14.1 MB in the beginning and 25.4 MB in the end (delta: -11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 32.84 ms. Allocated memory is still 44.0 MB. Free memory was 25.4 MB in the beginning and 23.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 18.99 ms. Allocated memory is still 44.0 MB. Free memory was 23.8 MB in the beginning and 22.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 293.66 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 22.5 MB in the beginning and 21.8 MB in the end (delta: 691.9 kB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 463.84 ms. Allocated memory is still 45.6 MB. Free memory was 21.3 MB in the beginning and 21.7 MB in the end (delta: -394.5 kB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 5.40 ms. Allocated memory is still 45.6 MB. Free memory was 21.5 MB in the beginning and 21.2 MB in the end (delta: 286.2 kB). Peak memory consumption was 286.2 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_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 -> 6ccf0fb82c260d93e0a183861fdeec7e448b86af [2020-10-19 22:22:56,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:22:56,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:22:56,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:22:56,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:22:56,081 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:22:56,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2020-10-19 22:22:56,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e32985b/64c7b83896f04207a61a911e5b44e866/FLAG615816816 [2020-10-19 22:22:56,677 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:22:56,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2020-10-19 22:22:56,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e32985b/64c7b83896f04207a61a911e5b44e866/FLAG615816816 [2020-10-19 22:22:56,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e32985b/64c7b83896f04207a61a911e5b44e866 [2020-10-19 22:22:56,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:22:57,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:22:57,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:22:57,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:22:57,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:22:57,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:22:56" (1/1) ... [2020-10-19 22:22:57,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e52e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57, skipping insertion in model container [2020-10-19 22:22:57,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:22:56" (1/1) ... [2020-10-19 22:22:57,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:22:57,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:22:57,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:22:57,249 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:22:57,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:22:57,286 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:22:57,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57 WrapperNode [2020-10-19 22:22:57,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:22:57,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:22:57,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:22:57,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:22:57,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:22:57,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:22:57,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:22:57,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:22:57,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (1/1) ... [2020-10-19 22:22:57,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:22:57,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:22:57,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:22:57,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:22:57,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (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 [2020-10-19 22:22:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-10-19 22:22:57,436 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-10-19 22:22:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:22:57,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:22:57,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-19 22:22:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:22:57,685 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:22:57,685 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 22:22:57,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:22:57 BoogieIcfgContainer [2020-10-19 22:22:57,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:22:57,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:22:57,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:22:57,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:22:57,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:22:56" (1/3) ... [2020-10-19 22:22:57,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc20036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:22:57, skipping insertion in model container [2020-10-19 22:22:57,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:22:57" (2/3) ... [2020-10-19 22:22:57,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc20036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:22:57, skipping insertion in model container [2020-10-19 22:22:57,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:22:57" (3/3) ... [2020-10-19 22:22:57,713 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2020-10-19 22:22:57,729 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:22:57,737 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:22:57,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:22:57,795 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:22:57,796 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:22:57,796 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:22:57,799 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:22:57,799 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:22:57,799 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:22:57,800 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:22:57,800 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:22:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-19 22:22:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:22:57,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:22:57,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:22:57,846 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:22:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:22:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1397741056, now seen corresponding path program 1 times [2020-10-19 22:22:57,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:22:57,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342931601] [2020-10-19 22:22:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-19 22:22:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:22:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 22:22:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:22:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:22:58,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:22:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:22:58,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342931601] [2020-10-19 22:22:58,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:22:58,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2020-10-19 22:22:58,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300583483] [2020-10-19 22:22:58,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 22:22:58,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:22:58,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 22:22:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-19 22:22:58,400 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 11 states. [2020-10-19 22:22:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:22:58,640 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-19 22:22:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 22:22:58,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-19 22:22:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:22:58,668 INFO L225 Difference]: With dead ends: 33 [2020-10-19 22:22:58,668 INFO L226 Difference]: Without dead ends: 16 [2020-10-19 22:22:58,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-19 22:22:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-19 22:22:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-19 22:22:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 22:22:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-19 22:22:58,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-10-19 22:22:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:22:58,725 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-19 22:22:58,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 22:22:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-19 22:22:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:22:58,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:22:58,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:22:58,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 22:22:58,938 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:22:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:22:58,939 INFO L82 PathProgramCache]: Analyzing trace with hash -588624460, now seen corresponding path program 1 times [2020-10-19 22:22:58,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:22:58,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968162623] [2020-10-19 22:22:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-19 22:22:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:22:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 22:22:58,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:22:59,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968162623] [2020-10-19 22:22:59,068 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:22:59,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222645271] [2020-10-19 22:22:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:22:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:22:59,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 22:22:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:22:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 22:22:59,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:22:59,463 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 22:22:59,465 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:22:59,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970564810] [2020-10-19 22:22:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:22:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:22:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 22:22:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:22:59,552 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:22:59,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:22:59,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-19 22:22:59,553 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-19 22:22:59,553 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:23:00,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:23:00,181 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-19 22:23:00,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:23:00 BoogieIcfgContainer [2020-10-19 22:23:00,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:23:00,182 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:23:00,182 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:23:00,182 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:23:00,183 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:22:57" (3/4) ... [2020-10-19 22:23:00,186 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 22:23:00,186 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:23:00,189 INFO L168 Benchmark]: Toolchain (without parser) took 3192.74 ms. Allocated memory was 41.4 MB in the beginning and 48.8 MB in the end (delta: 7.3 MB). Free memory was 22.5 MB in the beginning and 22.1 MB in the end (delta: 348.3 kB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:23:00,190 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 33.0 MB. Free memory was 6.6 MB in the beginning and 6.5 MB in the end (delta: 91.0 kB). Peak memory consumption was 91.0 kB. Max. memory is 14.3 GB. [2020-10-19 22:23:00,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.61 ms. Allocated memory is still 41.4 MB. Free memory was 21.6 MB in the beginning and 11.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:23:00,192 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.68 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 10.8 MB in the beginning and 24.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:23:00,192 INFO L168 Benchmark]: Boogie Preprocessor took 23.73 ms. Allocated memory is still 43.0 MB. Free memory was 24.7 MB in the beginning and 23.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:23:00,193 INFO L168 Benchmark]: RCFGBuilder took 339.61 ms. Allocated memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Free memory was 23.3 MB in the beginning and 27.5 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:23:00,194 INFO L168 Benchmark]: TraceAbstraction took 2477.21 ms. Allocated memory was 45.1 MB in the beginning and 48.8 MB in the end (delta: 3.7 MB). Free memory was 27.2 MB in the beginning and 22.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:23:00,195 INFO L168 Benchmark]: Witness Printer took 4.57 ms. Allocated memory is still 48.8 MB. Free memory was 22.5 MB in the beginning and 22.1 MB in the end (delta: 408.9 kB). Peak memory consumption was 408.9 kB. Max. memory is 14.3 GB. [2020-10-19 22:23:00,201 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 33.0 MB. Free memory was 6.6 MB in the beginning and 6.5 MB in the end (delta: 91.0 kB). Peak memory consumption was 91.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 284.61 ms. Allocated memory is still 41.4 MB. Free memory was 21.6 MB in the beginning and 11.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 50.68 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 10.8 MB in the beginning and 24.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 23.73 ms. Allocated memory is still 43.0 MB. Free memory was 24.7 MB in the beginning and 23.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 339.61 ms. Allocated memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Free memory was 23.3 MB in the beginning and 27.5 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2477.21 ms. Allocated memory was 45.1 MB in the beginning and 48.8 MB in the end (delta: 3.7 MB). Free memory was 27.2 MB in the beginning and 22.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. * Witness Printer took 4.57 ms. Allocated memory is still 48.8 MB. Free memory was 22.5 MB in the beginning and 22.1 MB in the end (delta: 408.9 kB). Peak memory consumption was 408.9 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) [L31] CALL, EXPR hanoi(n) [L19] COND FALSE !(n == 1) [L22] CALL, EXPR hanoi(n-1) [L19] COND TRUE n == 1 [L20] return 1; [L22] RET, EXPR hanoi(n-1) [L22] return 2 * (hanoi(n-1)) + 1; [L31] RET, EXPR hanoi(n) [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1<