./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/recHanoi03-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/recHanoi03-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f30ad67ccdaa679199b144fc55a3359f87c5bd3e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 23:09:25,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 23:09:25,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 23:09:25,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 23:09:25,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 23:09:25,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 23:09:25,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 23:09:25,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 23:09:25,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 23:09:25,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 23:09:25,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 23:09:25,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 23:09:25,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 23:09:25,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 23:09:25,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 23:09:25,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 23:09:25,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 23:09:25,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 23:09:25,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 23:09:25,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 23:09:25,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 23:09:25,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 23:09:25,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 23:09:25,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 23:09:25,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 23:09:25,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 23:09:25,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 23:09:25,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 23:09:25,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 23:09:25,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 23:09:25,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 23:09:25,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 23:09:25,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 23:09:25,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 23:09:25,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 23:09:25,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 23:09:25,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 23:09:25,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 23:09:25,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 23:09:25,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 23:09:25,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 23:09:25,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 23:09:25,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 23:09:25,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 23:09:25,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 23:09:25,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 23:09:25,224 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 23:09:25,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 23:09:25,225 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 23:09:25,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 23:09:25,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 23:09:25,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 23:09:25,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 23:09:25,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 23:09:25,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 23:09:25,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 23:09:25,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 23:09:25,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 23:09:25,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 23:09:25,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 23:09:25,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 23:09:25,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 23:09:25,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 23:09:25,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:09:25,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 23:09:25,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 23:09:25,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 23:09:25,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 23:09:25,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 23:09:25,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 23:09:25,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 23:09:25,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f30ad67ccdaa679199b144fc55a3359f87c5bd3e [2020-10-25 23:09:25,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 23:09:25,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 23:09:25,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 23:09:25,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 23:09:25,680 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 23:09:25,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi03-2.c [2020-10-25 23:09:25,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af01bfc2a/0b47c45f4abb44018ccdec621229c600/FLAGb6da6c449 [2020-10-25 23:09:26,474 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 23:09:26,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c [2020-10-25 23:09:26,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af01bfc2a/0b47c45f4abb44018ccdec621229c600/FLAGb6da6c449 [2020-10-25 23:09:26,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af01bfc2a/0b47c45f4abb44018ccdec621229c600 [2020-10-25 23:09:26,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 23:09:26,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 23:09:26,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 23:09:26,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 23:09:26,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 23:09:26,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:09:26" (1/1) ... [2020-10-25 23:09:26,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e01bd4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:26, skipping insertion in model container [2020-10-25 23:09:26,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:09:26" (1/1) ... [2020-10-25 23:09:26,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 23:09:26,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 23:09:27,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:09:27,136 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 23:09:27,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:09:27,169 INFO L208 MainTranslator]: Completed translation [2020-10-25 23:09:27,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27 WrapperNode [2020-10-25 23:09:27,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 23:09:27,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 23:09:27,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 23:09:27,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 23:09:27,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 23:09:27,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 23:09:27,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 23:09:27,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 23:09:27,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (1/1) ... [2020-10-25 23:09:27,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 23:09:27,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 23:09:27,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 23:09:27,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 23:09:27,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (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 [2020-10-25 23:09:27,332 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-10-25 23:09:27,333 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-10-25 23:09:27,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 23:09:27,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 23:09:27,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 23:09:27,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 23:09:27,573 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 23:09:27,574 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-25 23:09:27,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:27 BoogieIcfgContainer [2020-10-25 23:09:27,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 23:09:27,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 23:09:27,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 23:09:27,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 23:09:27,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 11:09:26" (1/3) ... [2020-10-25 23:09:27,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755c0b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:09:27, skipping insertion in model container [2020-10-25 23:09:27,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:27" (2/3) ... [2020-10-25 23:09:27,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755c0b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:09:27, skipping insertion in model container [2020-10-25 23:09:27,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:27" (3/3) ... [2020-10-25 23:09:27,586 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-10-25 23:09:27,604 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 23:09:27,610 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 23:09:27,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 23:09:27,655 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 23:09:27,656 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 23:09:27,656 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 23:09:27,656 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 23:09:27,657 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 23:09:27,657 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 23:09:27,657 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 23:09:27,657 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 23:09:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-25 23:09:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 23:09:27,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:27,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:27,685 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:27,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1397741056, now seen corresponding path program 1 times [2020-10-25 23:09:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:27,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964808680] [2020-10-25 23:09:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:27,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 23:09:27,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964808680] [2020-10-25 23:09:27,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:09:27,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-25 23:09:27,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019285771] [2020-10-25 23:09:28,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 23:09:28,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:28,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 23:09:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-25 23:09:28,029 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2020-10-25 23:09:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:28,189 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-25 23:09:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 23:09:28,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-25 23:09:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:28,202 INFO L225 Difference]: With dead ends: 30 [2020-10-25 23:09:28,202 INFO L226 Difference]: Without dead ends: 16 [2020-10-25 23:09:28,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-25 23:09:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-25 23:09:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-25 23:09:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-25 23:09:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-25 23:09:28,250 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-10-25 23:09:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:28,251 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-25 23:09:28,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 23:09:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-25 23:09:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 23:09:28,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:28,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:28,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 23:09:28,255 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:28,256 INFO L82 PathProgramCache]: Analyzing trace with hash -588624460, now seen corresponding path program 1 times [2020-10-25 23:09:28,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:28,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57694460] [2020-10-25 23:09:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:28,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:28,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:09:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 23:09:28,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57694460] [2020-10-25 23:09:28,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446987230] [2020-10-25 23:09:28,493 INFO L95 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 [2020-10-25 23:09:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:28,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 23:09:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:09:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 23:09:29,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:09:29,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-25 23:09:29,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653795171] [2020-10-25 23:09:29,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 23:09:29,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:29,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 23:09:29,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-25 23:09:29,013 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 14 states. [2020-10-25 23:09:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:29,360 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-25 23:09:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 23:09:29,363 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-25 23:09:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:29,364 INFO L225 Difference]: With dead ends: 23 [2020-10-25 23:09:29,364 INFO L226 Difference]: Without dead ends: 19 [2020-10-25 23:09:29,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-25 23:09:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-25 23:09:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-25 23:09:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-25 23:09:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-25 23:09:29,379 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-10-25 23:09:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:29,385 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-25 23:09:29,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 23:09:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-25 23:09:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 23:09:29,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:29,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:29,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 23:09:29,604 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:29,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1786431680, now seen corresponding path program 2 times [2020-10-25 23:09:29,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:29,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005208727] [2020-10-25 23:09:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:29,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:29,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:09:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:29,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:09:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 23:09:29,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005208727] [2020-10-25 23:09:29,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929245047] [2020-10-25 23:09:29,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:30,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:09:30,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:09:30,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-25 23:09:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:09:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 23:09:30,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:09:30,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-10-25 23:09:30,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420062681] [2020-10-25 23:09:30,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-25 23:09:30,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:30,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-25 23:09:30,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-25 23:09:30,576 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2020-10-25 23:09:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:31,000 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-25 23:09:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-25 23:09:31,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-10-25 23:09:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:31,002 INFO L225 Difference]: With dead ends: 31 [2020-10-25 23:09:31,002 INFO L226 Difference]: Without dead ends: 25 [2020-10-25 23:09:31,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-25 23:09:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-25 23:09:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-25 23:09:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-25 23:09:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-25 23:09:31,010 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2020-10-25 23:09:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:31,011 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-25 23:09:31,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-25 23:09:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-25 23:09:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-25 23:09:31,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:31,013 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:31,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:31,228 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:31,230 INFO L82 PathProgramCache]: Analyzing trace with hash -669566080, now seen corresponding path program 3 times [2020-10-25 23:09:31,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:31,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309440021] [2020-10-25 23:09:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:31,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:31,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:09:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:31,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:09:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:31,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:09:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:31,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:09:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-25 23:09:31,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309440021] [2020-10-25 23:09:31,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096701055] [2020-10-25 23:09:31,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:31,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-25 23:09:31,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:09:31,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 23:09:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:09:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-25 23:09:32,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 23:09:32,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 26 [2020-10-25 23:09:32,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783819443] [2020-10-25 23:09:32,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 23:09:32,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:32,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 23:09:32,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-10-25 23:09:32,479 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 14 states. [2020-10-25 23:09:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:32,566 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-25 23:09:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-25 23:09:32,567 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-25 23:09:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:32,568 INFO L225 Difference]: With dead ends: 25 [2020-10-25 23:09:32,568 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 23:09:32,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-10-25 23:09:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 23:09:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 23:09:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 23:09:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 23:09:32,572 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-25 23:09:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:32,573 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 23:09:32,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 23:09:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 23:09:32,573 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 23:09:32,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:32,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 23:09:32,795 INFO L274 CegarLoopResult]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2020-10-25 23:09:32,796 INFO L277 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-10-25 23:09:32,801 INFO L274 CegarLoopResult]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2020-10-25 23:09:32,802 INFO L270 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2020-10-25 23:09:32,802 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-10-25 23:09:32,802 INFO L274 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-10-25 23:09:32,802 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 23:09:32,802 INFO L274 CegarLoopResult]: For program point L32(lines 32 36) no Hoare annotation was computed. [2020-10-25 23:09:32,802 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 23:09:32,803 INFO L270 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (<= ULTIMATE.start_main_~n~0 31) [2020-10-25 23:09:32,803 INFO L274 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-10-25 23:09:32,803 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 23:09:32,803 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 23:09:32,803 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-10-25 23:09:32,804 INFO L277 CegarLoopResult]: At program point L26(lines 26 37) the Hoare annotation is: true [2020-10-25 23:09:32,804 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 23:09:32,804 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-10-25 23:09:32,804 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 23:09:32,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 11:09:32 BoogieIcfgContainer [2020-10-25 23:09:32,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 23:09:32,815 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 23:09:32,815 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 23:09:32,815 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 23:09:32,816 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:27" (3/4) ... [2020-10-25 23:09:32,819 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 23:09:32,826 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2020-10-25 23:09:32,831 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-25 23:09:32,831 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 23:09:32,832 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 23:09:32,832 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 23:09:32,874 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 23:09:32,874 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 23:09:32,876 INFO L168 Benchmark]: Toolchain (without parser) took 6022.33 ms. Allocated memory was 44.0 MB in the beginning and 81.8 MB in the end (delta: 37.7 MB). Free memory was 22.1 MB in the beginning and 61.3 MB in the end (delta: -39.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:09:32,877 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 44.0 MB. Free memory was 31.4 MB in the beginning and 31.4 MB in the end (delta: 35.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:09:32,878 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.29 ms. Allocated memory is still 44.0 MB. Free memory was 21.5 MB in the beginning and 23.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:32,878 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.83 ms. Allocated memory is still 44.0 MB. Free memory was 23.7 MB in the beginning and 22.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:09:32,879 INFO L168 Benchmark]: Boogie Preprocessor took 24.23 ms. Allocated memory is still 44.0 MB. Free memory was 22.4 MB in the beginning and 21.4 MB in the end (delta: 976.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:32,880 INFO L168 Benchmark]: RCFGBuilder took 338.28 ms. Allocated memory is still 44.0 MB. Free memory was 21.4 MB in the beginning and 19.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:32,881 INFO L168 Benchmark]: TraceAbstraction took 5236.70 ms. Allocated memory was 44.0 MB in the beginning and 81.8 MB in the end (delta: 37.7 MB). Free memory was 19.3 MB in the beginning and 63.4 MB in the end (delta: -44.1 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:32,882 INFO L168 Benchmark]: Witness Printer took 59.13 ms. Allocated memory is still 81.8 MB. Free memory was 63.4 MB in the beginning and 61.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:32,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 44.0 MB. Free memory was 31.4 MB in the beginning and 31.4 MB in the end (delta: 35.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 309.29 ms. Allocated memory is still 44.0 MB. Free memory was 21.5 MB in the beginning and 23.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.83 ms. Allocated memory is still 44.0 MB. Free memory was 23.7 MB in the beginning and 22.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.23 ms. Allocated memory is still 44.0 MB. Free memory was 22.4 MB in the beginning and 21.4 MB in the end (delta: 976.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 338.28 ms. Allocated memory is still 44.0 MB. Free memory was 21.4 MB in the beginning and 19.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5236.70 ms. Allocated memory was 44.0 MB in the beginning and 81.8 MB in the end (delta: 37.7 MB). Free memory was 19.3 MB in the beginning and 63.4 MB in the end (delta: -44.1 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. * Witness Printer took 59.13 ms. Allocated memory is still 81.8 MB. Free memory was 63.4 MB in the beginning and 61.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.1s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 20 SDslu, 282 SDs, 0 SdLazy, 309 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 8 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 154 ConstructedInterpolants, 14 QuantifiedInterpolants, 24552 SizeOfPredicates, 11 NumberOfNonLiveVariables, 266 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 96/140 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...