./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-new/nested-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/loop-new/nested-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-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(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f63971ff7e1e47adf4fc8a9c16196a6401c3822 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 19:13:39,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 19:13:39,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 19:13:39,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 19:13:39,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 19:13:39,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 19:13:39,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 19:13:39,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 19:13:39,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 19:13:39,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 19:13:39,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 19:13:39,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 19:13:39,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 19:13:39,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 19:13:39,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 19:13:39,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 19:13:39,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 19:13:39,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 19:13:39,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 19:13:39,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 19:13:39,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 19:13:39,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 19:13:39,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 19:13:39,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 19:13:39,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 19:13:39,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 19:13:39,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 19:13:39,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 19:13:39,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 19:13:39,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 19:13:39,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 19:13:39,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 19:13:39,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 19:13:39,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 19:13:39,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 19:13:39,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 19:13:39,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 19:13:39,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 19:13:39,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 19:13:39,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 19:13:39,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 19:13:39,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 19:13:39,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 19:13:39,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 19:13:39,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 19:13:39,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 19:13:39,259 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 19:13:39,259 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 19:13:39,259 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 19:13:39,259 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 19:13:39,260 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 19:13:39,260 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 19:13:39,260 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 19:13:39,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 19:13:39,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 19:13:39,261 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 19:13:39,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 19:13:39,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 19:13:39,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 19:13:39,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 19:13:39,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 19:13:39,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 19:13:39,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 19:13:39,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 19:13:39,264 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 19:13:39,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 19:13:39,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 19:13:39,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 19:13:39,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 19:13:39,265 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 19:13:39,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 19:13:39,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 19:13:39,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 19:13:39,267 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 19:13:39,268 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 19:13:39,268 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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(F end) ) 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 -> 7f63971ff7e1e47adf4fc8a9c16196a6401c3822 [2020-10-19 19:13:39,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 19:13:39,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 19:13:39,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 19:13:39,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 19:13:39,651 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 19:13:39,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/nested-1.i [2020-10-19 19:13:39,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4254e4ea4/a5b02ca4208b487eae8f7f8294a26b60/FLAGe55f2d718 [2020-10-19 19:13:40,136 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 19:13:40,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/nested-1.i [2020-10-19 19:13:40,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4254e4ea4/a5b02ca4208b487eae8f7f8294a26b60/FLAGe55f2d718 [2020-10-19 19:13:40,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4254e4ea4/a5b02ca4208b487eae8f7f8294a26b60 [2020-10-19 19:13:40,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 19:13:40,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 19:13:40,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 19:13:40,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 19:13:40,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 19:13:40,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65655e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40, skipping insertion in model container [2020-10-19 19:13:40,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 19:13:40,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 19:13:40,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 19:13:40,791 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 19:13:40,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 19:13:40,823 INFO L208 MainTranslator]: Completed translation [2020-10-19 19:13:40,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40 WrapperNode [2020-10-19 19:13:40,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 19:13:40,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 19:13:40,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 19:13:40,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 19:13:40,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 19:13:40,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 19:13:40,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 19:13:40,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 19:13:40,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (1/1) ... [2020-10-19 19:13:40,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 19:13:40,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 19:13:40,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 19:13:40,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 19:13:40,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (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:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:41,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 19:13:41,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 19:13:41,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 19:13:41,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 19:13:41,250 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 19:13:41,250 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-19 19:13:41,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:41 BoogieIcfgContainer [2020-10-19 19:13:41,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 19:13:41,253 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 19:13:41,253 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 19:13:41,256 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 19:13:41,257 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:41,257 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 07:13:40" (1/3) ... [2020-10-19 19:13:41,258 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@649b0782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 07:13:41, skipping insertion in model container [2020-10-19 19:13:41,258 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:41,259 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:40" (2/3) ... [2020-10-19 19:13:41,259 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@649b0782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 07:13:41, skipping insertion in model container [2020-10-19 19:13:41,259 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:41,259 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:41" (3/3) ... [2020-10-19 19:13:41,261 INFO L373 chiAutomizerObserver]: Analyzing ICFG nested-1.i [2020-10-19 19:13:41,313 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 19:13:41,314 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 19:13:41,314 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 19:13:41,314 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 19:13:41,314 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 19:13:41,315 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 19:13:41,315 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 19:13:41,315 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 19:13:41,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-10-19 19:13:41,368 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 19:13:41,369 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:41,369 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:41,379 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-19 19:13:41,379 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:41,380 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 19:13:41,380 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-10-19 19:13:41,382 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 19:13:41,382 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:41,382 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:41,383 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-19 19:13:41,383 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:41,395 INFO L794 eck$LassoCheckResult]: Stem: 16#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 14#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post7, main_#t~post6, main_#t~post5, main_~n~0, main_~m~0, main_~k~0, main_~i~0, main_~j~0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~m~0 := main_#t~nondet4;havoc main_#t~nondet4;main_~k~0 := 0;havoc main_~i~0;havoc main_~j~0; 8#L29true assume !!(10 <= main_~n~0 && main_~n~0 <= 10000); 12#L30true assume !!(10 <= main_~m~0 && main_~m~0 <= 10000);main_~i~0 := 0; 6#L31-3true [2020-10-19 19:13:41,395 INFO L796 eck$LassoCheckResult]: Loop: 6#L31-3true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 9#L32-3true assume !true; 10#L31-2true main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 6#L31-3true [2020-10-19 19:13:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash 925672, now seen corresponding path program 1 times [2020-10-19 19:13:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:41,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47580096] [2020-10-19 19:13:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:41,533 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:41,549 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:41,570 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash 50037, now seen corresponding path program 1 times [2020-10-19 19:13:41,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:41,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882985097] [2020-10-19 19:13:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:41,605 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 19:13:41,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882985097] [2020-10-19 19:13:41,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 19:13:41,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 19:13:41,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576728303] [2020-10-19 19:13:41,615 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 19:13:41,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:41,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 19:13:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 19:13:41,630 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-19 19:13:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:41,637 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2020-10-19 19:13:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 19:13:41,639 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 19 transitions. [2020-10-19 19:13:41,641 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 19:13:41,646 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 8 states and 9 transitions. [2020-10-19 19:13:41,647 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-10-19 19:13:41,648 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-19 19:13:41,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2020-10-19 19:13:41,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:41,649 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-19 19:13:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2020-10-19 19:13:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-19 19:13:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 19:13:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-10-19 19:13:41,673 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-19 19:13:41,674 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-19 19:13:41,674 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 19:13:41,674 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2020-10-19 19:13:41,675 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-10-19 19:13:41,675 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:41,676 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:41,676 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-19 19:13:41,676 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:41,677 INFO L794 eck$LassoCheckResult]: Stem: 43#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 41#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post7, main_#t~post6, main_#t~post5, main_~n~0, main_~m~0, main_~k~0, main_~i~0, main_~j~0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~m~0 := main_#t~nondet4;havoc main_#t~nondet4;main_~k~0 := 0;havoc main_~i~0;havoc main_~j~0; 42#L29 assume !!(10 <= main_~n~0 && main_~n~0 <= 10000); 48#L30 assume !!(10 <= main_~m~0 && main_~m~0 <= 10000);main_~i~0 := 0; 44#L31-3 [2020-10-19 19:13:41,677 INFO L796 eck$LassoCheckResult]: Loop: 44#L31-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 45#L32-3 assume !(main_~j~0 < main_~m~0); 46#L31-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 44#L31-3 [2020-10-19 19:13:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:41,677 INFO L82 PathProgramCache]: Analyzing trace with hash 925672, now seen corresponding path program 2 times [2020-10-19 19:13:41,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:41,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829110613] [2020-10-19 19:13:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:41,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:41,710 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:41,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:41,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:41,715 INFO L82 PathProgramCache]: Analyzing trace with hash 49851, now seen corresponding path program 1 times [2020-10-19 19:13:41,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:41,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288755031] [2020-10-19 19:13:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:41,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:41,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:41,727 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:41,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1806910836, now seen corresponding path program 1 times [2020-10-19 19:13:41,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:41,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224527572] [2020-10-19 19:13:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:41,817 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 19:13:41,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224527572] [2020-10-19 19:13:41,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 19:13:41,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 19:13:41,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324870781] [2020-10-19 19:13:41,859 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:41,860 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:41,860 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:41,861 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:41,861 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:41,861 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:41,861 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:41,861 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:41,862 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration2_Loop [2020-10-19 19:13:41,862 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:41,862 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:41,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:41,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:41,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:41,968 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:41,969 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:41,979 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:41,979 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:41,990 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 19:13:41,991 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~j~0=0, ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~j~0=0, ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:42,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:42,033 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:42,078 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:42,078 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:42,221 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:42,223 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:42,223 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:42,223 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:42,223 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:42,223 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:42,223 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:42,224 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:42,224 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:42,224 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration2_Loop [2020-10-19 19:13:42,225 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:42,225 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:42,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:42,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:42,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:42,291 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:42,297 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:42,314 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 19:13:42,318 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:42,318 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:42,319 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:42,319 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:42,319 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:42,323 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:42,323 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:42,332 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:42,377 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 19:13:42,379 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:42,380 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:42,380 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:42,380 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:42,380 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:42,382 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:42,382 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:42,387 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:42,395 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-19 19:13:42,396 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:42,413 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:42,413 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:42,413 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:42,414 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:42,451 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:42,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:42,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:42,536 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 19:13:42,540 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:42,541 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-10-19 19:13:42,582 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 13 states and 17 transitions. Complement of second has 4 states. [2020-10-19 19:13:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-10-19 19:13:42,586 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 4 letters. Loop has 3 letters. [2020-10-19 19:13:42,588 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:42,588 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 3 letters. [2020-10-19 19:13:42,588 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:42,588 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 4 letters. Loop has 6 letters. [2020-10-19 19:13:42,589 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:42,589 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 17 transitions. [2020-10-19 19:13:42,590 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 19:13:42,591 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 12 states and 15 transitions. [2020-10-19 19:13:42,591 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-19 19:13:42,592 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-10-19 19:13:42,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2020-10-19 19:13:42,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:42,592 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-10-19 19:13:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2020-10-19 19:13:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-10-19 19:13:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-19 19:13:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2020-10-19 19:13:42,594 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2020-10-19 19:13:42,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 19:13:42,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 19:13:42,596 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2020-10-19 19:13:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:42,619 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2020-10-19 19:13:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 19:13:42,620 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 18 transitions. [2020-10-19 19:13:42,621 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 19:13:42,622 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 18 transitions. [2020-10-19 19:13:42,622 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-10-19 19:13:42,623 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-10-19 19:13:42,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 18 transitions. [2020-10-19 19:13:42,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:42,624 INFO L691 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-19 19:13:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 18 transitions. [2020-10-19 19:13:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2020-10-19 19:13:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 19:13:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2020-10-19 19:13:42,626 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-10-19 19:13:42,627 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-10-19 19:13:42,627 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 19:13:42,627 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 15 transitions. [2020-10-19 19:13:42,628 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 19:13:42,628 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:42,628 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:42,629 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 19:13:42,629 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 19:13:42,629 INFO L794 eck$LassoCheckResult]: Stem: 133#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 131#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post7, main_#t~post6, main_#t~post5, main_~n~0, main_~m~0, main_~k~0, main_~i~0, main_~j~0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~m~0 := main_#t~nondet4;havoc main_#t~nondet4;main_~k~0 := 0;havoc main_~i~0;havoc main_~j~0; 132#L29 assume !!(10 <= main_~n~0 && main_~n~0 <= 10000); 139#L30 assume !!(10 <= main_~m~0 && main_~m~0 <= 10000);main_~i~0 := 0; 134#L31-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 135#L32-3 [2020-10-19 19:13:42,630 INFO L796 eck$LassoCheckResult]: Loop: 135#L32-3 assume !!(main_~j~0 < main_~m~0);main_#t~post7 := main_~k~0;main_~k~0 := 1 + main_#t~post7;havoc main_#t~post7; 140#L32-2 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 135#L32-3 [2020-10-19 19:13:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash 28695852, now seen corresponding path program 1 times [2020-10-19 19:13:42,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:42,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996255820] [2020-10-19 19:13:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:42,644 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:42,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:42,659 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1859, now seen corresponding path program 1 times [2020-10-19 19:13:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:42,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956044267] [2020-10-19 19:13:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:42,666 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:42,669 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:42,671 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1806910894, now seen corresponding path program 1 times [2020-10-19 19:13:42,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:42,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919837123] [2020-10-19 19:13:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:42,696 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:42,710 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:42,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:42,738 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:42,738 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:42,738 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:42,738 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:42,739 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:42,739 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:42,739 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:42,739 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:42,739 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration3_Loop [2020-10-19 19:13:42,739 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:42,740 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:42,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:42,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:42,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:42,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:42,803 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:42,803 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:42,809 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:42,809 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:42,850 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:42,850 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:43,054 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:43,056 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:43,056 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:43,056 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:43,057 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:43,057 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:43,057 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:43,057 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:43,057 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:43,057 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration3_Loop [2020-10-19 19:13:43,057 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:43,057 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:43,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,066 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,111 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:43,111 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:43,122 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 19:13:43,124 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:43,124 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:43,124 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:43,125 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:43,125 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:43,126 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:43,126 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:43,129 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:43,133 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 19:13:43,133 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:43,144 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:43,144 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:43,144 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:43,144 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~m~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~m~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:43,181 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,230 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 19:13:43,231 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:43,231 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-10-19 19:13:43,250 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 24 states and 31 transitions. Complement of second has 7 states. [2020-10-19 19:13:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2020-10-19 19:13:43,251 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2020-10-19 19:13:43,252 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:43,252 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 2 letters. [2020-10-19 19:13:43,252 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:43,252 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 5 letters. Loop has 4 letters. [2020-10-19 19:13:43,253 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:43,253 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 31 transitions. [2020-10-19 19:13:43,255 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 19:13:43,256 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 17 states and 21 transitions. [2020-10-19 19:13:43,256 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-19 19:13:43,257 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-19 19:13:43,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 21 transitions. [2020-10-19 19:13:43,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 19:13:43,257 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-10-19 19:13:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 21 transitions. [2020-10-19 19:13:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2020-10-19 19:13:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 19:13:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-10-19 19:13:43,259 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-10-19 19:13:43,260 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-10-19 19:13:43,260 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 19:13:43,260 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 14 transitions. [2020-10-19 19:13:43,261 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-19 19:13:43,261 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:43,261 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:43,262 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 19:13:43,262 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-19 19:13:43,262 INFO L794 eck$LassoCheckResult]: Stem: 214#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 212#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post7, main_#t~post6, main_#t~post5, main_~n~0, main_~m~0, main_~k~0, main_~i~0, main_~j~0;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~m~0 := main_#t~nondet4;havoc main_#t~nondet4;main_~k~0 := 0;havoc main_~i~0;havoc main_~j~0; 213#L29 assume !!(10 <= main_~n~0 && main_~n~0 <= 10000); 222#L30 assume !!(10 <= main_~m~0 && main_~m~0 <= 10000);main_~i~0 := 0; 215#L31-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 216#L32-3 assume !!(main_~j~0 < main_~m~0);main_#t~post7 := main_~k~0;main_~k~0 := 1 + main_#t~post7;havoc main_#t~post7; 220#L32-2 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 223#L32-3 assume !(main_~j~0 < main_~m~0); 221#L31-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 217#L31-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 218#L32-3 [2020-10-19 19:13:43,262 INFO L796 eck$LassoCheckResult]: Loop: 218#L32-3 assume !!(main_~j~0 < main_~m~0);main_#t~post7 := main_~k~0;main_~k~0 := 1 + main_#t~post7;havoc main_#t~post7; 219#L32-2 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 218#L32-3 [2020-10-19 19:13:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:43,262 INFO L82 PathProgramCache]: Analyzing trace with hash 857348446, now seen corresponding path program 1 times [2020-10-19 19:13:43,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:43,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60713116] [2020-10-19 19:13:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 19:13:43,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60713116] [2020-10-19 19:13:43,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837655798] [2020-10-19 19:13:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 19:13:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 19:13:43,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 19:13:43,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-19 19:13:43,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849771216] [2020-10-19 19:13:43,413 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 19:13:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1859, now seen corresponding path program 2 times [2020-10-19 19:13:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:43,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304171721] [2020-10-19 19:13:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:43,418 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:43,421 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:43,422 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:43,438 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:43,438 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:43,438 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:43,439 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:43,439 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:43,439 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:43,439 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:43,439 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:43,439 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration4_Loop [2020-10-19 19:13:43,439 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:43,440 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:43,442 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,454 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,498 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:43,498 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:43,511 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:43,511 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:43,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:43,571 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:43,702 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:43,705 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:43,705 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:43,705 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:43,706 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:43,706 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:43,706 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:43,706 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:43,706 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:43,706 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested-1.i_Iteration4_Loop [2020-10-19 19:13:43,706 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:43,706 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:43,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 19:13:43,756 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:43,756 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:43,766 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:43,767 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:43,768 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:43,768 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:43,768 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:43,768 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:43,769 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:43,769 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 19:13:43,775 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:43,779 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 19:13:43,779 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:43,791 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:43,792 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:43,792 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:43,792 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~m~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~m~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2020-10-19 19:13:43,823 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,874 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 19:13:43,874 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:43,874 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-19 19:13:43,891 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 20 states and 25 transitions. Complement of second has 7 states. [2020-10-19 19:13:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2020-10-19 19:13:43,892 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2020-10-19 19:13:43,892 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:43,893 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 19:13:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,937 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 19:13:43,938 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:43,938 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-19 19:13:43,951 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 20 states and 25 transitions. Complement of second has 7 states. [2020-10-19 19:13:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2020-10-19 19:13:43,952 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2020-10-19 19:13:43,953 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:43,953 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 19:13:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:43,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:43,995 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 19:13:43,996 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 19:13:43,996 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-19 19:13:44,012 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 14 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 17 states and 21 transitions. Complement of second has 6 states. [2020-10-19 19:13:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-19 19:13:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2020-10-19 19:13:44,013 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 10 letters. Loop has 2 letters. [2020-10-19 19:13:44,013 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:44,013 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 2 letters. [2020-10-19 19:13:44,014 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:44,014 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 10 letters. Loop has 4 letters. [2020-10-19 19:13:44,014 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:44,015 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 21 transitions. [2020-10-19 19:13:44,016 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:44,016 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 0 states and 0 transitions. [2020-10-19 19:13:44,016 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 19:13:44,016 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 19:13:44,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 19:13:44,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:44,016 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:44,016 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:44,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 19:13:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-19 19:13:44,017 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 7 states. [2020-10-19 19:13:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:44,017 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-19 19:13:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 19:13:44,018 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-19 19:13:44,018 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:44,018 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 19:13:44,018 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 19:13:44,018 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 19:13:44,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 19:13:44,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:44,018 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:44,019 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:44,019 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:44,019 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 19:13:44,019 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 19:13:44,019 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:44,019 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 19:13:44,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 07:13:44 BoogieIcfgContainer [2020-10-19 19:13:44,026 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 19:13:44,027 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 19:13:44,027 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 19:13:44,027 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 19:13:44,027 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:41" (3/4) ... [2020-10-19 19:13:44,031 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 19:13:44,031 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 19:13:44,034 INFO L168 Benchmark]: Toolchain (without parser) took 3477.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 85.5 MB). Free memory was 954.6 MB in the beginning and 804.1 MB in the end (delta: 150.5 MB). Peak memory consumption was 236.0 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:44,034 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 19:13:44,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.24 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:44,036 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 85.5 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -137.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:44,037 INFO L168 Benchmark]: Boogie Preprocessor took 24.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:44,037 INFO L168 Benchmark]: RCFGBuilder took 292.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:44,038 INFO L168 Benchmark]: BuchiAutomizer took 2773.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 804.1 MB in the end (delta: 250.2 MB). Peak memory consumption was 250.2 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:44,039 INFO L168 Benchmark]: Witness Printer took 4.42 ms. Allocated memory is still 1.1 GB. Free memory is still 804.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 19:13:44,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 259.24 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 110.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 85.5 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -137.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 292.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2773.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 804.1 MB in the end (delta: 250.2 MB). Peak memory consumption was 250.2 MB. Max. memory is 11.5 GB. * Witness Printer took 4.42 ms. Allocated memory is still 1.1 GB. Free memory is still 804.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (3 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function n + -1 * i and consists of 3 locations. One deterministic module has affine ranking function m + -1 * j and consists of 4 locations. One nondeterministic module has affine ranking function m + -1 * j and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 7 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.7s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.1s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 12 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 64 SDtfs, 50 SDslu, 13 SDs, 0 SdLazy, 40 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT1 conc0 concLT1 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf98 lsp65 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...