./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.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-invgen/seq-3.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 a6fcc511e5e199bb4964a3b49fd7a49c7f36043d ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:13:13,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 19:13:13,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 19:13:13,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 19:13:13,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 19:13:13,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 19:13:13,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 19:13:13,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 19:13:13,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 19:13:13,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 19:13:13,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 19:13:13,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 19:13:13,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 19:13:13,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 19:13:13,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 19:13:13,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 19:13:13,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 19:13:13,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 19:13:13,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 19:13:13,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 19:13:13,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 19:13:13,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 19:13:13,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 19:13:13,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 19:13:13,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 19:13:13,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 19:13:13,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 19:13:13,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 19:13:13,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 19:13:13,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 19:13:13,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 19:13:13,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 19:13:13,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 19:13:13,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 19:13:13,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 19:13:13,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 19:13:13,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 19:13:13,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 19:13:13,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 19:13:13,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 19:13:13,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 19:13:13,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 19:13:13,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 19:13:13,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 19:13:13,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 19:13:13,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 19:13:13,175 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 19:13:13,176 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 19:13:13,176 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 19:13:13,176 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 19:13:13,177 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 19:13:13,177 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 19:13:13,177 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 19:13:13,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 19:13:13,178 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 19:13:13,178 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 19:13:13,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 19:13:13,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 19:13:13,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 19:13:13,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 19:13:13,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 19:13:13,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 19:13:13,180 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 19:13:13,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 19:13:13,181 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 19:13:13,181 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 19:13:13,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 19:13:13,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 19:13:13,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 19:13:13,182 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 19:13:13,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 19:13:13,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 19:13:13,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 19:13:13,183 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 19:13:13,185 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 19:13:13,185 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 -> a6fcc511e5e199bb4964a3b49fd7a49c7f36043d [2020-10-19 19:13:13,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 19:13:13,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 19:13:13,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 19:13:13,554 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 19:13:13,554 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 19:13:13,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/seq-3.i [2020-10-19 19:13:13,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53162281/506b0d9cb5f34a3fad6b54b58f2429bb/FLAG5b63e0789 [2020-10-19 19:13:14,172 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 19:13:14,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i [2020-10-19 19:13:14,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53162281/506b0d9cb5f34a3fad6b54b58f2429bb/FLAG5b63e0789 [2020-10-19 19:13:14,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53162281/506b0d9cb5f34a3fad6b54b58f2429bb [2020-10-19 19:13:14,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 19:13:14,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 19:13:14,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 19:13:14,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 19:13:14,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 19:13:14,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:14,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7893e276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14, skipping insertion in model container [2020-10-19 19:13:14,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:14,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 19:13:14,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 19:13:14,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 19:13:14,848 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 19:13:14,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 19:13:14,881 INFO L208 MainTranslator]: Completed translation [2020-10-19 19:13:14,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14 WrapperNode [2020-10-19 19:13:14,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 19:13:14,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 19:13:14,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 19:13:14,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 19:13:14,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:14,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:14,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 19:13:14,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 19:13:14,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 19:13:14,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 19:13:15,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:15,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:15,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:15,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:15,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:15,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:15,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (1/1) ... [2020-10-19 19:13:15,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 19:13:15,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 19:13:15,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 19:13:15,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 19:13:15,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (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 19:13:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 19:13:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 19:13:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 19:13:15,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 19:13:15,313 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 19:13:15,313 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-19 19:13:15,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:15 BoogieIcfgContainer [2020-10-19 19:13:15,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 19:13:15,316 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 19:13:15,316 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 19:13:15,320 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 19:13:15,321 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:15,321 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 07:13:14" (1/3) ... [2020-10-19 19:13:15,322 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@77b1db00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 07:13:15, skipping insertion in model container [2020-10-19 19:13:15,323 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:15,323 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 07:13:14" (2/3) ... [2020-10-19 19:13:15,323 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@77b1db00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 07:13:15, skipping insertion in model container [2020-10-19 19:13:15,323 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 19:13:15,324 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:15" (3/3) ... [2020-10-19 19:13:15,326 INFO L373 chiAutomizerObserver]: Analyzing ICFG seq-3.i [2020-10-19 19:13:15,382 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 19:13:15,383 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 19:13:15,383 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 19:13:15,384 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 19:13:15,384 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 19:13:15,384 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 19:13:15,385 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 19:13:15,385 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 19:13:15,407 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-10-19 19:13:15,438 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 8 [2020-10-19 19:13:15,438 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:15,439 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:15,448 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-19 19:13:15,448 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 19:13:15,449 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 19:13:15,449 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-10-19 19:13:15,451 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 8 [2020-10-19 19:13:15,451 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:15,452 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:15,452 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-10-19 19:13:15,453 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 19:13:15,461 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 10#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post5, main_#t~post6, main_#t~post7, main_#t~post8, main_#t~post9, main_#t~post10, main_~n0~0, main_~n1~0, main_~i0~0, main_~k~0, main_~i1~0, main_~j1~0;havoc main_~n0~0;havoc main_~n1~0;main_~i0~0 := 0;main_~k~0 := 0;main_~n0~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n1~0 := main_#t~nondet4;havoc main_#t~nondet4; 8#L30true assume !!(-1000000 <= main_~n0~0 && main_~n0~0 < 1000000); 11#L31true assume !!(-1000000 <= main_~n1~0 && main_~n1~0 < 1000000); 9#L32-2true [2020-10-19 19:13:15,462 INFO L796 eck$LassoCheckResult]: Loop: 9#L32-2true assume !!(main_~i0~0 < main_~n0~0);main_#t~post5 := main_~i0~0;main_~i0~0 := 1 + main_#t~post5;havoc main_#t~post5;main_#t~post6 := main_~k~0;main_~k~0 := 1 + main_#t~post6;havoc main_#t~post6; 9#L32-2true [2020-10-19 19:13:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:15,470 INFO L82 PathProgramCache]: Analyzing trace with hash 925672, now seen corresponding path program 1 times [2020-10-19 19:13:15,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:15,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847704177] [2020-10-19 19:13:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:15,595 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:15,612 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:15,633 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:15,634 INFO L82 PathProgramCache]: Analyzing trace with hash 52, now seen corresponding path program 1 times [2020-10-19 19:13:15,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:15,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686866920] [2020-10-19 19:13:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:15,641 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:15,653 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:15,661 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash 28695853, now seen corresponding path program 1 times [2020-10-19 19:13:15,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:15,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349648802] [2020-10-19 19:13:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:15,699 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:15,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:15,735 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:15,784 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:15,785 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:15,785 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:15,785 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:15,786 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:15,786 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:15,786 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:15,786 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:15,786 INFO L133 ssoRankerPreferences]: Filename of dumped script: seq-3.i_Iteration1_Loop [2020-10-19 19:13:15,787 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:15,787 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:15,806 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 19:13:15,813 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 19:13:15,824 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 19:13:15,835 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 19:13:15,906 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:15,907 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 19:13:15,914 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:15,914 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 19:13:15,924 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 19:13:15,925 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post6=0} Honda state: {ULTIMATE.start_main_#t~post6=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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:15,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:15,968 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:15,974 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 19:13:15,974 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 19:13:16,000 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:16,000 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:16,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:16,174 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:16,175 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:16,176 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:16,176 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:16,176 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:16,176 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:16,176 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,177 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:16,177 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:16,178 INFO L133 ssoRankerPreferences]: Filename of dumped script: seq-3.i_Iteration1_Loop [2020-10-19 19:13:16,178 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:16,178 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:16,180 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 19:13:16,184 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 19:13:16,196 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 19:13:16,201 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 19:13:16,245 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:16,251 INFO L489 LassoAnalysis]: Using template 'affine'. 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 19:13:16,264 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 19:13:16,267 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:16,267 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:16,268 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:16,268 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:16,268 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:16,271 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:16,271 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 19:13:16,274 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:16,317 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 19:13:16,319 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:16,320 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:16,320 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:16,320 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:16,320 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:16,322 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:16,322 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,326 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:16,338 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 19:13:16,338 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 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 19:13:16,351 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:16,351 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:16,351 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:16,352 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i0~0, ULTIMATE.start_main_~n0~0) = -1*ULTIMATE.start_main_~i0~0 + 1*ULTIMATE.start_main_~n0~0 Supporting invariants [] [2020-10-19 19:13:16,383 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:16,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:16,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:16,455 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 19:13:16,474 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 19:13:16,476 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 2 states. [2020-10-19 19:13:16,539 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 2 states. Result 43 states and 61 transitions. Complement of second has 5 states. [2020-10-19 19:13:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 19:13:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 19:13:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2020-10-19 19:13:16,546 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 44 transitions. Stem has 4 letters. Loop has 1 letters. [2020-10-19 19:13:16,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:16,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 44 transitions. Stem has 5 letters. Loop has 1 letters. [2020-10-19 19:13:16,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:16,549 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 44 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-19 19:13:16,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:16,550 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 61 transitions. [2020-10-19 19:13:16,555 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-10-19 19:13:16,560 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 12 states and 15 transitions. [2020-10-19 19:13:16,562 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-10-19 19:13:16,563 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-19 19:13:16,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 15 transitions. [2020-10-19 19:13:16,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:16,565 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-10-19 19:13:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 15 transitions. [2020-10-19 19:13:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-19 19:13:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 19:13:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2020-10-19 19:13:16,597 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-10-19 19:13:16,597 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-10-19 19:13:16,597 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 19:13:16,597 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 15 transitions. [2020-10-19 19:13:16,598 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-10-19 19:13:16,598 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:16,598 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:16,599 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-10-19 19:13:16,599 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-10-19 19:13:16,599 INFO L794 eck$LassoCheckResult]: Stem: 104#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 98#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post5, main_#t~post6, main_#t~post7, main_#t~post8, main_#t~post9, main_#t~post10, main_~n0~0, main_~n1~0, main_~i0~0, main_~k~0, main_~i1~0, main_~j1~0;havoc main_~n0~0;havoc main_~n1~0;main_~i0~0 := 0;main_~k~0 := 0;main_~n0~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n1~0 := main_#t~nondet4;havoc main_#t~nondet4; 99#L30 assume !!(-1000000 <= main_~n0~0 && main_~n0~0 < 1000000); 100#L31 assume !!(-1000000 <= main_~n1~0 && main_~n1~0 < 1000000); 101#L32-2 assume !(main_~i0~0 < main_~n0~0); 107#L32-3 main_~i1~0 := 0; 108#L37-2 [2020-10-19 19:13:16,600 INFO L796 eck$LassoCheckResult]: Loop: 108#L37-2 assume !!(main_~i1~0 < main_~n1~0);main_#t~post7 := main_~i1~0;main_~i1~0 := 1 + main_#t~post7;havoc main_#t~post7;main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 108#L37-2 [2020-10-19 19:13:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:16,600 INFO L82 PathProgramCache]: Analyzing trace with hash 889571406, now seen corresponding path program 1 times [2020-10-19 19:13:16,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:16,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590820642] [2020-10-19 19:13:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:16,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:16,626 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:16,631 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash 65, now seen corresponding path program 1 times [2020-10-19 19:13:16,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:16,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894976466] [2020-10-19 19:13:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:16,636 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:16,639 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:16,641 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:16,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1806909844, now seen corresponding path program 1 times [2020-10-19 19:13:16,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:16,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062333625] [2020-10-19 19:13:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:16,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:16,672 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:16,676 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:16,694 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:16,694 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:16,694 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:16,694 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:16,694 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:16,694 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,695 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:16,695 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:16,695 INFO L133 ssoRankerPreferences]: Filename of dumped script: seq-3.i_Iteration2_Loop [2020-10-19 19:13:16,695 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:16,695 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:16,697 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 19:13:16,705 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 19:13:16,708 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 19:13:16,711 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 19:13:16,758 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:16,758 INFO L404 LassoAnalysis]: Checking for nontermination... 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 19:13:16,764 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:16,764 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,809 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 19:13:16,810 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:16,963 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:16,965 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:16,965 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:16,966 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:16,966 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:16,966 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:16,966 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:16,966 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:16,966 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:16,966 INFO L133 ssoRankerPreferences]: Filename of dumped script: seq-3.i_Iteration2_Loop [2020-10-19 19:13:16,967 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:16,967 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:16,968 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 19:13:16,980 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 19:13:16,983 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 19:13:16,992 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 19:13:17,041 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:17,042 INFO L489 LassoAnalysis]: Using template 'affine'. 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 19:13:17,049 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:17,051 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:17,051 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:17,052 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:17,052 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:17,052 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:17,054 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:17,054 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 19:13:17,057 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:17,071 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 19:13:17,071 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:17,078 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:17,078 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:17,078 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:17,078 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n1~0, ULTIMATE.start_main_~i1~0) = 1*ULTIMATE.start_main_~n1~0 - 1*ULTIMATE.start_main_~i1~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:17,110 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:17,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 19:13:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:17,173 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 19:13:17,173 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-19 19:13:17,173 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 6 Second operand 2 states. [2020-10-19 19:13:17,194 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 6. Second operand 2 states. Result 17 states and 23 transitions. Complement of second has 4 states. [2020-10-19 19:13:17,196 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 19:13:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-19 19:13:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 13 transitions. [2020-10-19 19:13:17,198 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 6 letters. Loop has 1 letters. [2020-10-19 19:13:17,198 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:17,198 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 7 letters. Loop has 1 letters. [2020-10-19 19:13:17,198 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:17,199 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 13 transitions. Stem has 6 letters. Loop has 2 letters. [2020-10-19 19:13:17,200 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:17,201 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 23 transitions. [2020-10-19 19:13:17,202 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 19:13:17,204 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 13 states and 17 transitions. [2020-10-19 19:13:17,205 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-10-19 19:13:17,205 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-19 19:13:17,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2020-10-19 19:13:17,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:17,206 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-10-19 19:13:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2020-10-19 19:13:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-19 19:13:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-19 19:13:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2020-10-19 19:13:17,211 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-10-19 19:13:17,211 INFO L594 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-10-19 19:13:17,211 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 19:13:17,212 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 17 transitions. [2020-10-19 19:13:17,214 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 19:13:17,215 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 19:13:17,215 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 19:13:17,216 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 19:13:17,216 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 19:13:17,217 INFO L794 eck$LassoCheckResult]: Stem: 173#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 167#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~post5, main_#t~post6, main_#t~post7, main_#t~post8, main_#t~post9, main_#t~post10, main_~n0~0, main_~n1~0, main_~i0~0, main_~k~0, main_~i1~0, main_~j1~0;havoc main_~n0~0;havoc main_~n1~0;main_~i0~0 := 0;main_~k~0 := 0;main_~n0~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n1~0 := main_#t~nondet4;havoc main_#t~nondet4; 168#L30 assume !!(-1000000 <= main_~n0~0 && main_~n0~0 < 1000000); 169#L31 assume !!(-1000000 <= main_~n1~0 && main_~n1~0 < 1000000); 170#L32-2 assume !(main_~i0~0 < main_~n0~0); 176#L32-3 main_~i1~0 := 0; 177#L37-2 assume !(main_~i1~0 < main_~n1~0); 175#L37-3 main_~j1~0 := 0; 172#L42-2 [2020-10-19 19:13:17,217 INFO L796 eck$LassoCheckResult]: Loop: 172#L42-2 assume !!(main_~j1~0 < main_~n0~0 + main_~n1~0);__VERIFIER_assert_#in~cond := (if main_~k~0 > 0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 174#L18 assume !(0 == __VERIFIER_assert_~cond); 171#L18-2 main_#t~post9 := main_~j1~0;main_~j1~0 := 1 + main_#t~post9;havoc main_#t~post9;main_#t~post10 := main_~k~0;main_~k~0 := main_#t~post10 - 1;havoc main_#t~post10; 172#L42-2 [2020-10-19 19:13:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 179630292, now seen corresponding path program 1 times [2020-10-19 19:13:17,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:17,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331985366] [2020-10-19 19:13:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:17,258 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:17,280 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:17,286 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash 76913, now seen corresponding path program 1 times [2020-10-19 19:13:17,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:17,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875084856] [2020-10-19 19:13:17,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:17,302 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 19:13:17,327 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 19:13:17,329 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 19:13:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash -163174722, now seen corresponding path program 1 times [2020-10-19 19:13:17,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 19:13:17,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082269172] [2020-10-19 19:13:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 19:13:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:17,412 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 19:13:17,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082269172] [2020-10-19 19:13:17,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 19:13:17,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 19:13:17,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723517580] [2020-10-19 19:13:17,485 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:17,486 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:17,486 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:17,486 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:17,486 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 19:13:17,486 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:17,487 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:17,487 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:17,487 INFO L133 ssoRankerPreferences]: Filename of dumped script: seq-3.i_Iteration3_Loop [2020-10-19 19:13:17,487 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:17,487 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:17,489 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 19:13:17,496 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 19:13:17,503 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 19:13:17,511 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 19:13:17,514 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 19:13:17,575 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:17,575 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 19:13:17,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:17,579 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 [2020-10-19 19:13:17,585 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 19:13:17,585 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Honda state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-19 19:13:17,636 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 19:13:17,636 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 19:13:17,687 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:17,687 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 19:13:17,729 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 19:13:17,731 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 19:13:17,731 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 19:13:17,731 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 19:13:17,731 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 19:13:17,732 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 19:13:17,732 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:17,732 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 19:13:17,732 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 19:13:17,732 INFO L133 ssoRankerPreferences]: Filename of dumped script: seq-3.i_Iteration3_Loop [2020-10-19 19:13:17,732 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 19:13:17,732 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 19:13:17,735 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 19:13:17,742 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 19:13:17,750 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 19:13:17,757 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 19:13:17,760 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 19:13:17,819 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 19:13:17,819 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-19 19:13:17,834 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 19:13:17,836 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 19:13:17,837 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 19:13:17,837 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 19:13:17,837 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 19:13:17,837 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 19:13:17,839 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 19:13:17,839 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:17,842 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 19:13:17,845 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 19:13:17,845 INFO L444 ModelExtractionUtils]: 1 out of 3 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 17 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 19:13:17,850 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 19:13:17,850 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 19:13:17,850 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 19:13:17,850 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~k~0) = 1*ULTIMATE.start_main_~k~0 Supporting invariants [] [2020-10-19 19:13:17,886 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 19:13:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 19:13:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:17,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 19:13:17,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 19:13:17,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 19:13:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 19:13:17,979 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-19 19:13:17,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 19:13:17,994 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 19:13:17,995 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-19 19:13:17,995 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 17 transitions. cyclomatic complexity: 7 Second operand 4 states. [2020-10-19 19:13:18,037 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 17 transitions. cyclomatic complexity: 7. Second operand 4 states. Result 16 states and 21 transitions. Complement of second has 6 states. [2020-10-19 19:13:18,038 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 19:13:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 19:13:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2020-10-19 19:13:18,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 3 letters. [2020-10-19 19:13:18,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:18,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 11 letters. Loop has 3 letters. [2020-10-19 19:13:18,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:18,040 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 6 letters. [2020-10-19 19:13:18,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 19:13:18,040 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 21 transitions. [2020-10-19 19:13:18,042 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:18,042 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 0 states and 0 transitions. [2020-10-19 19:13:18,042 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 19:13:18,042 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 19:13:18,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 19:13:18,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:18,042 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:18,042 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:18,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 19:13:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 19:13:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-19 19:13:18,048 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 7 states. [2020-10-19 19:13:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 19:13:18,052 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-19 19:13:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 19:13:18,053 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-19 19:13:18,053 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:18,054 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 19:13:18,054 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 19:13:18,054 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 19:13:18,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 19:13:18,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 19:13:18,054 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:18,055 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:18,055 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 19:13:18,055 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 19:13:18,055 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 19:13:18,055 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 19:13:18,056 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 19:13:18,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 07:13:18 BoogieIcfgContainer [2020-10-19 19:13:18,063 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 19:13:18,064 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 19:13:18,064 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 19:13:18,065 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 19:13:18,065 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 07:13:15" (3/4) ... [2020-10-19 19:13:18,070 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 19:13:18,070 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 19:13:18,073 INFO L168 Benchmark]: Toolchain (without parser) took 3473.39 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 954.6 MB in the beginning and 845.8 MB in the end (delta: 108.8 MB). Peak memory consumption was 229.4 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:18,074 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 19:13:18,075 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.49 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 19:13:18,076 INFO L168 Benchmark]: Boogie Procedure Inliner took 111.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -172.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:18,077 INFO L168 Benchmark]: Boogie Preprocessor took 26.33 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:18,078 INFO L168 Benchmark]: RCFGBuilder took 293.32 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: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:18,079 INFO L168 Benchmark]: BuchiAutomizer took 2747.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 845.8 MB in the end (delta: 239.8 MB). Peak memory consumption was 239.8 MB. Max. memory is 11.5 GB. [2020-10-19 19:13:18,079 INFO L168 Benchmark]: Witness Printer took 6.37 ms. Allocated memory is still 1.1 GB. Free memory is still 845.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 19:13:18,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 274.49 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 111.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -172.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.33 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 293.32 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: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2747.86 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 845.8 MB in the end (delta: 239.8 MB). Peak memory consumption was 239.8 MB. Max. memory is 11.5 GB. * Witness Printer took 6.37 ms. Allocated memory is still 1.1 GB. Free memory is still 845.8 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 4 terminating modules (1 trivial, 3 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * i0 + n0 and consists of 4 locations. One deterministic module has affine ranking function n1 + -1 * i1 and consists of 3 locations. One deterministic module has affine ranking function k and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 7 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.6s and 4 iterations. TraceHistogramMax:1. 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 4. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 13 states and ocurred in iteration 2. Nontrivial modules had stage [3, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 38 SDtfs, 41 SDslu, 13 SDs, 0 SdLazy, 18 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf100 lsp59 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq156 hnf93 smp100 dnf100 smp100 tf112 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...