./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c -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 fe54aa6cbf5093caec91497905a5a8a5f126c540 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:46:43,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:46:43,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:46:44,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:46:44,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:46:44,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:46:44,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:46:44,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:46:44,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:46:44,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:46:44,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:46:44,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:46:44,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:46:44,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:46:44,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:46:44,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:46:44,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:46:44,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:46:44,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:46:44,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:46:44,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:46:44,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:46:44,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:46:44,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:46:44,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:46:44,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:46:44,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:46:44,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:46:44,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:46:44,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:46:44,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:46:44,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:46:44,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:46:44,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:46:44,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:46:44,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:46:44,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:46:44,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:46:44,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:46:44,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:46:44,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:46:44,108 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 06:46:44,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:46:44,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:46:44,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:46:44,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:46:44,152 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:46:44,152 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 06:46:44,153 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 06:46:44,153 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 06:46:44,153 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 06:46:44,153 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 06:46:44,154 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 06:46:44,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:46:44,155 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:46:44,155 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:46:44,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:46:44,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:46:44,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:46:44,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 06:46:44,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 06:46:44,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 06:46:44,158 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:46:44,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:46:44,158 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 06:46:44,158 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:46:44,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 06:46:44,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:46:44,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:46:44,159 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 06:46:44,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:46:44,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:46:44,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:46:44,160 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 06:46:44,162 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 06:46:44,162 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 -> fe54aa6cbf5093caec91497905a5a8a5f126c540 [2020-10-20 06:46:44,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:46:44,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:46:44,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:46:44,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:46:44,441 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:46:44,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c [2020-10-20 06:46:44,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64c84571d/d18a76b9ab7e418eaed90937d7af1fca/FLAG7a9ad5cd2 [2020-10-20 06:46:45,094 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:46:45,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c [2020-10-20 06:46:45,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64c84571d/d18a76b9ab7e418eaed90937d7af1fca/FLAG7a9ad5cd2 [2020-10-20 06:46:45,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64c84571d/d18a76b9ab7e418eaed90937d7af1fca [2020-10-20 06:46:45,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:46:45,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:46:45,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:46:45,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:46:45,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:46:45,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ad2f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45, skipping insertion in model container [2020-10-20 06:46:45,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:46:45,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:46:45,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:46:45,720 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:46:45,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:46:45,763 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:46:45,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45 WrapperNode [2020-10-20 06:46:45,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:46:45,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:46:45,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:46:45,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:46:45,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:46:45,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:46:45,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:46:45,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:46:45,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (1/1) ... [2020-10-20 06:46:45,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:46:45,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:46:45,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:46:45,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:46:45,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (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 [2020-10-20 06:46:45,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:46:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:46:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:46:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:46:46,162 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:46:46,162 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-20 06:46:46,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:46:46 BoogieIcfgContainer [2020-10-20 06:46:46,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:46:46,165 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 06:46:46,166 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 06:46:46,170 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 06:46:46,171 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:46:46,171 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 06:46:45" (1/3) ... [2020-10-20 06:46:46,172 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@9e731d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:46:46, skipping insertion in model container [2020-10-20 06:46:46,173 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:46:46,173 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:46:45" (2/3) ... [2020-10-20 06:46:46,173 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@9e731d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:46:46, skipping insertion in model container [2020-10-20 06:46:46,174 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:46:46,174 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:46:46" (3/3) ... [2020-10-20 06:46:46,176 INFO L373 chiAutomizerObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-10-20 06:46:46,259 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 06:46:46,259 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 06:46:46,259 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 06:46:46,260 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:46:46,271 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:46:46,271 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 06:46:46,272 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:46:46,272 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 06:46:46,290 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states. [2020-10-20 06:46:46,321 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-20 06:46:46,322 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:46,323 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:46,333 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-20 06:46:46,333 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-20 06:46:46,334 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 06:46:46,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states. [2020-10-20 06:46:46,337 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-20 06:46:46,337 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:46,337 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:46,338 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-20 06:46:46,338 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-20 06:46:46,345 INFO L794 eck$LassoCheckResult]: Stem: 17#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 14#L-1true havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 6#L101true [2020-10-20 06:46:46,346 INFO L796 eck$LassoCheckResult]: Loop: 6#L101true assume !false; 12#L20true assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 4#L26true assume 8466 == main_~s__state~0; 8#L27true assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 5#L59-1true assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 6#L101true [2020-10-20 06:46:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-10-20 06:46:46,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:46,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477292635] [2020-10-20 06:46:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:46,481 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:46,499 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:46,522 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:46,524 INFO L82 PathProgramCache]: Analyzing trace with hash 39284085, now seen corresponding path program 1 times [2020-10-20 06:46:46,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:46,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154914146] [2020-10-20 06:46:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:46,533 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:46,538 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:46,540 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:46,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723571, now seen corresponding path program 1 times [2020-10-20 06:46:46,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:46,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180054029] [2020-10-20 06:46:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:46,560 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:46,573 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:46,579 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:46,700 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:46,701 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:46,701 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:46,701 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:46,701 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:46:46,702 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:46,702 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:46,702 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:46,702 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration1_Loop [2020-10-20 06:46:46,703 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:46,703 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:46,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:46,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:46,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:46,849 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:46,850 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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:46,864 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:46,864 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:46:46,873 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:46:46,874 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~s__hit~0=0} Honda state: {ULTIMATE.start_main_~s__hit~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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:46,900 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:46,900 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2020-10-20 06:46:46,931 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:46:46,931 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:46:46,955 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:46:46,990 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:46,990 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:46,990 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:46,991 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:46,991 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:46:46,991 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:46,991 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:46,991 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:46,991 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration1_Loop [2020-10-20 06:46:46,991 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:46,992 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:46,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:47,007 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:47,030 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:47,097 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:47,103 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:47,108 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 [2020-10-20 06:46:47,110 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:47,111 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:47,112 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:47,112 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:46:47,112 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:47,116 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:46:47,117 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:46:47,120 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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:47,153 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 [2020-10-20 06:46:47,158 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:47,158 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:47,158 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:47,158 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:46:47,158 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:47,160 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:46:47,161 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:46:47,167 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:46:47,197 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:46:47,198 INFO L444 ModelExtractionUtils]: 0 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 7 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:47,210 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:46:47,210 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:46:47,210 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:46:47,211 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~blastFlag~0) = -1*ULTIMATE.start_main_~blastFlag~0 + 1 Supporting invariants [] [2020-10-20 06:46:47,239 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:46:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:47,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:46:47,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:47,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:46:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:47,402 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 [2020-10-20 06:46:47,404 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states. Second operand 4 states. [2020-10-20 06:46:47,492 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states.. Second operand 4 states. Result 53 states and 85 transitions. Complement of second has 5 states. [2020-10-20 06:46:47,493 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 [2020-10-20 06:46:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:46:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2020-10-20 06:46:47,498 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 2 letters. Loop has 5 letters. [2020-10-20 06:46:47,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:47,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 7 letters. Loop has 5 letters. [2020-10-20 06:46:47,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:47,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 2 letters. Loop has 10 letters. [2020-10-20 06:46:47,501 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:47,502 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 85 transitions. [2020-10-20 06:46:47,507 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-20 06:46:47,513 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 38 states and 59 transitions. [2020-10-20 06:46:47,515 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2020-10-20 06:46:47,516 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2020-10-20 06:46:47,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 59 transitions. [2020-10-20 06:46:47,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:47,517 INFO L691 BuchiCegarLoop]: Abstraction has 38 states and 59 transitions. [2020-10-20 06:46:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 59 transitions. [2020-10-20 06:46:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-20 06:46:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 06:46:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 57 transitions. [2020-10-20 06:46:47,554 INFO L714 BuchiCegarLoop]: Abstraction has 36 states and 57 transitions. [2020-10-20 06:46:47,555 INFO L594 BuchiCegarLoop]: Abstraction has 36 states and 57 transitions. [2020-10-20 06:46:47,555 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 06:46:47,555 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 57 transitions. [2020-10-20 06:46:47,557 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-20 06:46:47,557 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:47,557 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:47,558 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 06:46:47,558 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-20 06:46:47,558 INFO L794 eck$LassoCheckResult]: Stem: 155#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 153#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 154#L101 assume !false; 138#L20 [2020-10-20 06:46:47,559 INFO L796 eck$LassoCheckResult]: Loop: 138#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 128#L26 assume 8466 == main_~s__state~0; 129#L27 assume !(0 == main_~blastFlag~0); 134#L59-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 135#L101 assume !false; 138#L20 [2020-10-20 06:46:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2020-10-20 06:46:47,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:47,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705788462] [2020-10-20 06:46:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:47,573 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:47,601 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:47,609 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 44013377, now seen corresponding path program 1 times [2020-10-20 06:46:47,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:47,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239820796] [2020-10-20 06:46:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:47,622 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:47,631 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:47,633 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash 297857786, now seen corresponding path program 1 times [2020-10-20 06:46:47,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:47,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237357721] [2020-10-20 06:46:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:47,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237357721] [2020-10-20 06:46:47,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:46:47,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:46:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097944902] [2020-10-20 06:46:47,745 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:47,745 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:47,745 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:47,745 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:47,745 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:46:47,745 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:47,746 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:47,746 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:47,746 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration2_Loop [2020-10-20 06:46:47,746 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:47,746 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:47,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:47,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:47,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:47,844 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:47,845 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) [2020-10-20 06:46:47,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:47,857 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:47,861 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:46:47,861 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~s__hit~0=0} Honda state: {ULTIMATE.start_main_~s__hit~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2020-10-20 06:46:47,902 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:47,903 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:46:47,909 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:46:47,910 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~blastFlag~0=1} Honda state: {ULTIMATE.start_main_~blastFlag~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2020-10-20 06:46:47,939 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:47,939 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:47,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:46:47,968 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:46:47,978 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:46:48,008 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:48,008 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:48,008 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:48,008 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:48,008 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:46:48,009 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,009 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:48,009 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:48,009 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration2_Loop [2020-10-20 06:46:48,009 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:48,009 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:48,011 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,015 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,086 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:48,086 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 06:46:48,092 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 [2020-10-20 06:46:48,094 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:48,095 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:48,095 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:48,095 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:46:48,095 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:48,097 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:46:48,097 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,100 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:48,152 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 [2020-10-20 06:46:48,155 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:48,155 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:48,156 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:48,156 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-20 06:46:48,156 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:48,158 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-20 06:46:48,158 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,162 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:48,213 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 [2020-10-20 06:46:48,215 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:48,215 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:48,216 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:48,216 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:46:48,216 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:48,218 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:46:48,218 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,222 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:46:48,226 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:46:48,226 INFO L444 ModelExtractionUtils]: 0 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:48,262 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:46:48,263 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:46:48,263 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:46:48,263 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8489 Supporting invariants [] Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,301 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:46:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:46:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:46:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:48,369 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 [2020-10-20 06:46:48,370 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 57 transitions. cyclomatic complexity: 23 Second operand 5 states. [2020-10-20 06:46:48,445 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 57 transitions. cyclomatic complexity: 23. Second operand 5 states. Result 104 states and 155 transitions. Complement of second has 7 states. [2020-10-20 06:46:48,446 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 [2020-10-20 06:46:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 06:46:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2020-10-20 06:46:48,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 3 letters. Loop has 5 letters. [2020-10-20 06:46:48,448 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:48,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 8 letters. Loop has 5 letters. [2020-10-20 06:46:48,448 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:48,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 3 letters. Loop has 10 letters. [2020-10-20 06:46:48,449 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:48,450 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 104 states and 155 transitions. [2020-10-20 06:46:48,454 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-20 06:46:48,456 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 104 states to 77 states and 121 transitions. [2020-10-20 06:46:48,457 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-10-20 06:46:48,457 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2020-10-20 06:46:48,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 121 transitions. [2020-10-20 06:46:48,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:48,458 INFO L691 BuchiCegarLoop]: Abstraction has 77 states and 121 transitions. [2020-10-20 06:46:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states and 121 transitions. [2020-10-20 06:46:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-20 06:46:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 06:46:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 86 transitions. [2020-10-20 06:46:48,465 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 86 transitions. [2020-10-20 06:46:48,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:46:48,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:46:48,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:46:48,470 INFO L87 Difference]: Start difference. First operand 54 states and 86 transitions. Second operand 3 states. [2020-10-20 06:46:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:46:48,508 INFO L93 Difference]: Finished difference Result 90 states and 128 transitions. [2020-10-20 06:46:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:46:48,524 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 90 states and 128 transitions. [2020-10-20 06:46:48,531 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-10-20 06:46:48,539 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 90 states to 87 states and 125 transitions. [2020-10-20 06:46:48,539 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2020-10-20 06:46:48,540 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2020-10-20 06:46:48,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 125 transitions. [2020-10-20 06:46:48,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:48,543 INFO L691 BuchiCegarLoop]: Abstraction has 87 states and 125 transitions. [2020-10-20 06:46:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states and 125 transitions. [2020-10-20 06:46:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-20 06:46:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-20 06:46:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2020-10-20 06:46:48,557 INFO L714 BuchiCegarLoop]: Abstraction has 85 states and 123 transitions. [2020-10-20 06:46:48,557 INFO L594 BuchiCegarLoop]: Abstraction has 85 states and 123 transitions. [2020-10-20 06:46:48,558 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 06:46:48,558 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 85 states and 123 transitions. [2020-10-20 06:46:48,559 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-10-20 06:46:48,560 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:48,560 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:48,560 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 06:46:48,561 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-20 06:46:48,561 INFO L794 eck$LassoCheckResult]: Stem: 493#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 491#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 492#L101 assume !false; 472#L20 [2020-10-20 06:46:48,561 INFO L796 eck$LassoCheckResult]: Loop: 472#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 467#L26 assume !(8466 == main_~s__state~0); 468#L31 assume 8512 == main_~s__state~0; 489#L32 main_~tmp___1~0 := main_#t~nondet8;havoc main_#t~nondet8; 480#L71 assume 0 != main_~tmp___1~0;main_~s__state~0 := 8466; 471#L101 assume !false; 472#L20 [2020-10-20 06:46:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 2 times [2020-10-20 06:46:48,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:48,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835655314] [2020-10-20 06:46:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:48,572 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:48,582 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:48,585 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:48,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1365729718, now seen corresponding path program 1 times [2020-10-20 06:46:48,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:48,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678263747] [2020-10-20 06:46:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:48,591 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:48,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:48,596 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 644971805, now seen corresponding path program 1 times [2020-10-20 06:46:48,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:48,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644048531] [2020-10-20 06:46:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:48,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644048531] [2020-10-20 06:46:48,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:46:48,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:46:48,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027735284] [2020-10-20 06:46:48,662 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:48,662 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:48,662 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:48,663 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:48,663 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:46:48,663 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,663 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:48,664 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:48,664 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration3_Loop [2020-10-20 06:46:48,664 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:48,664 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:48,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,733 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:48,733 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2020-10-20 06:46:48,737 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:48,737 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:46:48,743 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:46:48,743 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet8=-4, ULTIMATE.start_main_~tmp___1~0=-4} Honda state: {ULTIMATE.start_main_#t~nondet8=-4, ULTIMATE.start_main_~tmp___1~0=-4} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2020-10-20 06:46:48,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:48,781 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,808 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:46:48,808 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:46:48,814 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:46:48,847 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:48,847 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:48,847 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:48,847 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:48,847 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:46:48,848 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,848 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:48,848 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:48,848 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration3_Loop [2020-10-20 06:46:48,848 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:48,848 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:48,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,863 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:48,915 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:48,915 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,926 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 [2020-10-20 06:46:48,927 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:48,928 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:48,928 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:48,928 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-20 06:46:48,928 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:48,930 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-20 06:46:48,930 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:46:48,934 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 20 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:48,979 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 [2020-10-20 06:46:48,981 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:48,981 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:48,981 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:48,981 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:46:48,981 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:48,983 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:46:48,983 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:46:48,986 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:46:48,989 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:46:48,990 INFO L444 ModelExtractionUtils]: 0 out of 3 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:49,010 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:46:49,010 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:46:49,010 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:46:49,011 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = 1*ULTIMATE.start_main_~s__state~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:49,052 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:46:49,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:46:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:49,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:46:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:49,160 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 [2020-10-20 06:46:49,161 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 85 states and 123 transitions. cyclomatic complexity: 44 Second operand 5 states. [2020-10-20 06:46:49,243 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 85 states and 123 transitions. cyclomatic complexity: 44. Second operand 5 states. Result 170 states and 232 transitions. Complement of second has 9 states. [2020-10-20 06:46:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 06:46:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 06:46:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2020-10-20 06:46:49,244 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 3 letters. Loop has 6 letters. [2020-10-20 06:46:49,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:49,245 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 9 letters. Loop has 6 letters. [2020-10-20 06:46:49,245 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:49,245 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 3 letters. Loop has 12 letters. [2020-10-20 06:46:49,246 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:49,246 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 232 transitions. [2020-10-20 06:46:49,249 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-10-20 06:46:49,251 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 141 states and 196 transitions. [2020-10-20 06:46:49,251 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 47 [2020-10-20 06:46:49,252 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 49 [2020-10-20 06:46:49,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 196 transitions. [2020-10-20 06:46:49,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:49,253 INFO L691 BuchiCegarLoop]: Abstraction has 141 states and 196 transitions. [2020-10-20 06:46:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states and 196 transitions. [2020-10-20 06:46:49,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 105. [2020-10-20 06:46:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-20 06:46:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2020-10-20 06:46:49,261 INFO L714 BuchiCegarLoop]: Abstraction has 105 states and 148 transitions. [2020-10-20 06:46:49,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:46:49,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:46:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:46:49,262 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand 3 states. [2020-10-20 06:46:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:46:49,284 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2020-10-20 06:46:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:46:49,284 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 94 transitions. [2020-10-20 06:46:49,286 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2020-10-20 06:46:49,286 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 61 states and 90 transitions. [2020-10-20 06:46:49,287 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-10-20 06:46:49,287 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-10-20 06:46:49,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 90 transitions. [2020-10-20 06:46:49,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:49,287 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-10-20 06:46:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 90 transitions. [2020-10-20 06:46:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-20 06:46:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 06:46:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 90 transitions. [2020-10-20 06:46:49,292 INFO L714 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-10-20 06:46:49,292 INFO L594 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-10-20 06:46:49,292 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 06:46:49,292 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 61 states and 90 transitions. [2020-10-20 06:46:49,293 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2020-10-20 06:46:49,294 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:49,294 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:49,294 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:49,295 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-20 06:46:49,295 INFO L794 eck$LassoCheckResult]: Stem: 979#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 978#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 953#L101 assume !false; 954#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 951#L26 assume 8466 == main_~s__state~0; 952#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 988#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 985#L101 assume !false; 984#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 982#L26 assume !(8466 == main_~s__state~0); 974#L31 [2020-10-20 06:46:49,295 INFO L796 eck$LassoCheckResult]: Loop: 974#L31 assume 8512 == main_~s__state~0; 975#L32 main_~tmp___1~0 := main_#t~nondet8;havoc main_#t~nondet8; 961#L71 assume !(0 != main_~tmp___1~0);main_~s__state~0 := 8640; 946#L101 assume !false; 972#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 973#L26 assume !(8466 == main_~s__state~0); 974#L31 [2020-10-20 06:46:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1523382593, now seen corresponding path program 1 times [2020-10-20 06:46:49,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:49,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010566666] [2020-10-20 06:46:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:49,307 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:49,316 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:49,320 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1623382260, now seen corresponding path program 1 times [2020-10-20 06:46:49,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:49,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041019893] [2020-10-20 06:46:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:49,328 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:49,331 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:49,333 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:49,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1141286606, now seen corresponding path program 1 times [2020-10-20 06:46:49,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:49,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752886433] [2020-10-20 06:46:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:49,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752886433] [2020-10-20 06:46:49,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:46:49,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:46:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655236332] [2020-10-20 06:46:49,417 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:49,418 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:49,418 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:49,418 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:49,418 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:46:49,418 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:49,418 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:49,418 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:49,418 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration4_Loop [2020-10-20 06:46:49,419 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:49,419 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:49,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:49,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:49,468 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:49,468 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:49,474 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:49,474 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:49,520 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:46:49,520 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:49,527 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:46:49,563 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:49,563 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:49,563 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:49,563 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:49,563 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:46:49,563 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:49,563 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:49,564 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:49,564 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration4_Loop [2020-10-20 06:46:49,564 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:49,564 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:49,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:49,572 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:49,616 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:49,616 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:49,622 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 [2020-10-20 06:46:49,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:49,624 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:49,624 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:49,625 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:46:49,625 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:49,626 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:46:49,626 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:49,632 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:46:49,635 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:46:49,636 INFO L444 ModelExtractionUtils]: 0 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:49,639 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:46:49,639 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:46:49,639 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:46:49,639 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = -1*ULTIMATE.start_main_~s__state~0 + 8576 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:49,665 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:46:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:49,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:46:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:46:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:49,770 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 [2020-10-20 06:46:49,770 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 90 transitions. cyclomatic complexity: 33 Second operand 4 states. [2020-10-20 06:46:49,851 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61 states and 90 transitions. cyclomatic complexity: 33. Second operand 4 states. Result 183 states and 281 transitions. Complement of second has 9 states. [2020-10-20 06:46:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 06:46:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:46:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2020-10-20 06:46:49,853 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 10 letters. Loop has 6 letters. [2020-10-20 06:46:49,853 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:49,854 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 16 letters. Loop has 6 letters. [2020-10-20 06:46:49,854 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:49,854 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 10 letters. Loop has 12 letters. [2020-10-20 06:46:49,854 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:49,854 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 281 transitions. [2020-10-20 06:46:49,857 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2020-10-20 06:46:49,859 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 163 states and 245 transitions. [2020-10-20 06:46:49,859 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2020-10-20 06:46:49,860 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2020-10-20 06:46:49,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 245 transitions. [2020-10-20 06:46:49,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:49,860 INFO L691 BuchiCegarLoop]: Abstraction has 163 states and 245 transitions. [2020-10-20 06:46:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 245 transitions. [2020-10-20 06:46:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-10-20 06:46:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-20 06:46:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 183 transitions. [2020-10-20 06:46:49,868 INFO L714 BuchiCegarLoop]: Abstraction has 125 states and 183 transitions. [2020-10-20 06:46:49,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:46:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:46:49,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:46:49,869 INFO L87 Difference]: Start difference. First operand 125 states and 183 transitions. Second operand 3 states. [2020-10-20 06:46:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:46:49,900 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-10-20 06:46:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:46:49,901 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 164 states and 223 transitions. [2020-10-20 06:46:49,903 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 36 [2020-10-20 06:46:49,905 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 164 states to 154 states and 211 transitions. [2020-10-20 06:46:49,905 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2020-10-20 06:46:49,905 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-10-20 06:46:49,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 154 states and 211 transitions. [2020-10-20 06:46:49,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:49,906 INFO L691 BuchiCegarLoop]: Abstraction has 154 states and 211 transitions. [2020-10-20 06:46:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states and 211 transitions. [2020-10-20 06:46:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2020-10-20 06:46:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-20 06:46:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 191 transitions. [2020-10-20 06:46:49,912 INFO L714 BuchiCegarLoop]: Abstraction has 134 states and 191 transitions. [2020-10-20 06:46:49,912 INFO L594 BuchiCegarLoop]: Abstraction has 134 states and 191 transitions. [2020-10-20 06:46:49,912 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 06:46:49,912 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 134 states and 191 transitions. [2020-10-20 06:46:49,913 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 35 [2020-10-20 06:46:49,914 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:49,914 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:49,914 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:49,915 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:49,915 INFO L794 eck$LassoCheckResult]: Stem: 1590#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1588#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 1589#L101 assume !false; 1668#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1656#L26 assume 8466 == main_~s__state~0; 1648#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 1646#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1560#L101 [2020-10-20 06:46:49,915 INFO L796 eck$LassoCheckResult]: Loop: 1560#L101 assume !false; 1564#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1554#L26 assume !(8466 == main_~s__state~0); 1555#L31 assume !(8512 == main_~s__state~0); 1550#L47 assume !(8640 == main_~s__state~0); 1551#L51 assume 8656 == main_~s__state~0; 1580#L52 assume 2 == main_~blastFlag~0;main_~blastFlag~0 := 3; 1582#L90-1 assume 4 == main_~blastFlag~0;main_~blastFlag~0 := 5; 1578#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 1559#L101 assume !false; 1627#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1628#L26 assume 8466 == main_~s__state~0; 1621#L27 assume !(0 == main_~blastFlag~0); 1558#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1560#L101 [2020-10-20 06:46:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 1 times [2020-10-20 06:46:49,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:49,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882537357] [2020-10-20 06:46:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,042 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,049 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,052 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1982564596, now seen corresponding path program 1 times [2020-10-20 06:46:50,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666525954] [2020-10-20 06:46:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:50,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666525954] [2020-10-20 06:46:50,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:46:50,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:46:50,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684200147] [2020-10-20 06:46:50,068 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:46:50,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:46:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:46:50,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:46:50,069 INFO L87 Difference]: Start difference. First operand 134 states and 191 transitions. cyclomatic complexity: 65 Second operand 3 states. [2020-10-20 06:46:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:46:50,100 INFO L93 Difference]: Finished difference Result 182 states and 254 transitions. [2020-10-20 06:46:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:46:50,101 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 254 transitions. [2020-10-20 06:46:50,103 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2020-10-20 06:46:50,105 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 182 states and 254 transitions. [2020-10-20 06:46:50,105 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 70 [2020-10-20 06:46:50,106 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 70 [2020-10-20 06:46:50,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 182 states and 254 transitions. [2020-10-20 06:46:50,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:50,106 INFO L691 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-10-20 06:46:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states and 254 transitions. [2020-10-20 06:46:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-20 06:46:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-20 06:46:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 254 transitions. [2020-10-20 06:46:50,112 INFO L714 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-10-20 06:46:50,112 INFO L594 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-10-20 06:46:50,112 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 06:46:50,112 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 182 states and 254 transitions. [2020-10-20 06:46:50,114 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2020-10-20 06:46:50,114 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:50,114 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:50,115 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,115 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,115 INFO L794 eck$LassoCheckResult]: Stem: 1921#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1918#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 1884#L101 assume !false; 1885#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2042#L26 assume 8466 == main_~s__state~0; 2006#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2002#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1925#L101 [2020-10-20 06:46:50,116 INFO L796 eck$LassoCheckResult]: Loop: 1925#L101 assume !false; 1975#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1976#L26 assume !(8466 == main_~s__state~0); 1968#L31 assume !(8512 == main_~s__state~0); 1969#L47 assume !(8640 == main_~s__state~0); 1904#L51 assume 8656 == main_~s__state~0; 1905#L52 assume 2 == main_~blastFlag~0;main_~blastFlag~0 := 3; 1911#L90-1 assume !(4 == main_~blastFlag~0); 1927#L97 assume !(5 == main_~blastFlag~0); 1900#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 1901#L101 assume !false; 2036#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2028#L26 assume 8466 == main_~s__state~0; 2020#L27 assume !(0 == main_~blastFlag~0); 1985#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1925#L101 [2020-10-20 06:46:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 2 times [2020-10-20 06:46:50,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828511717] [2020-10-20 06:46:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,124 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,131 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,134 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,135 INFO L82 PathProgramCache]: Analyzing trace with hash 862619384, now seen corresponding path program 1 times [2020-10-20 06:46:50,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356956109] [2020-10-20 06:46:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:50,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356956109] [2020-10-20 06:46:50,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:46:50,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:46:50,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079952431] [2020-10-20 06:46:50,161 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:46:50,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:46:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:46:50,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:46:50,161 INFO L87 Difference]: Start difference. First operand 182 states and 254 transitions. cyclomatic complexity: 80 Second operand 3 states. [2020-10-20 06:46:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:46:50,196 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2020-10-20 06:46:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:46:50,197 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 202 transitions. [2020-10-20 06:46:50,199 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 45 [2020-10-20 06:46:50,200 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 111 states and 141 transitions. [2020-10-20 06:46:50,200 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 58 [2020-10-20 06:46:50,201 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2020-10-20 06:46:50,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 141 transitions. [2020-10-20 06:46:50,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:50,201 INFO L691 BuchiCegarLoop]: Abstraction has 111 states and 141 transitions. [2020-10-20 06:46:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states and 141 transitions. [2020-10-20 06:46:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2020-10-20 06:46:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-20 06:46:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2020-10-20 06:46:50,205 INFO L714 BuchiCegarLoop]: Abstraction has 105 states and 134 transitions. [2020-10-20 06:46:50,205 INFO L594 BuchiCegarLoop]: Abstraction has 105 states and 134 transitions. [2020-10-20 06:46:50,205 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 06:46:50,205 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 134 transitions. [2020-10-20 06:46:50,206 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 45 [2020-10-20 06:46:50,206 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:50,207 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:50,207 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,207 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,208 INFO L794 eck$LassoCheckResult]: Stem: 2250#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2245#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2246#L101 assume !false; 2287#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2288#L26 assume 8466 == main_~s__state~0; 2276#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2271#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2255#L101 [2020-10-20 06:46:50,208 INFO L796 eck$LassoCheckResult]: Loop: 2255#L101 assume !false; 2290#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2291#L26 assume !(8466 == main_~s__state~0); 2280#L31 assume !(8512 == main_~s__state~0); 2281#L47 assume !(8640 == main_~s__state~0); 2316#L51 assume 8656 == main_~s__state~0; 2243#L52 assume 2 == main_~blastFlag~0;main_~blastFlag~0 := 3; 2244#L90-1 assume !(4 == main_~blastFlag~0); 2256#L97 assume !(5 == main_~blastFlag~0); 2240#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 2227#L101 assume !false; 2228#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2219#L26 assume !(8466 == main_~s__state~0); 2220#L31 assume !(8512 == main_~s__state~0); 2247#L47 assume 8640 == main_~s__state~0; 2317#L48 assume !(3 == main_~blastFlag~0); 2254#L79-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8656; 2255#L101 [2020-10-20 06:46:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 3 times [2020-10-20 06:46:50,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679695428] [2020-10-20 06:46:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,217 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,226 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,226 INFO L82 PathProgramCache]: Analyzing trace with hash 49895967, now seen corresponding path program 1 times [2020-10-20 06:46:50,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496371953] [2020-10-20 06:46:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:50,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496371953] [2020-10-20 06:46:50,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:46:50,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:46:50,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007166354] [2020-10-20 06:46:50,247 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:46:50,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:46:50,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:46:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:46:50,248 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. cyclomatic complexity: 36 Second operand 3 states. [2020-10-20 06:46:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:46:50,269 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2020-10-20 06:46:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:46:50,270 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 146 transitions. [2020-10-20 06:46:50,272 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 56 [2020-10-20 06:46:50,273 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 116 states and 146 transitions. [2020-10-20 06:46:50,273 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2020-10-20 06:46:50,273 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 64 [2020-10-20 06:46:50,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 146 transitions. [2020-10-20 06:46:50,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:50,273 INFO L691 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-10-20 06:46:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states and 146 transitions. [2020-10-20 06:46:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-20 06:46:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-20 06:46:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-10-20 06:46:50,277 INFO L714 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-10-20 06:46:50,277 INFO L594 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-10-20 06:46:50,277 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 06:46:50,277 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 116 states and 146 transitions. [2020-10-20 06:46:50,278 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 56 [2020-10-20 06:46:50,288 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:50,288 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:50,289 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,289 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,289 INFO L794 eck$LassoCheckResult]: Stem: 2476#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2473#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2454#L101 assume !false; 2455#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2530#L26 assume 8466 == main_~s__state~0; 2504#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2497#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2499#L101 [2020-10-20 06:46:50,289 INFO L796 eck$LassoCheckResult]: Loop: 2499#L101 assume !false; 2548#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2547#L26 assume !(8466 == main_~s__state~0); 2546#L31 assume !(8512 == main_~s__state~0); 2545#L47 assume !(8640 == main_~s__state~0); 2544#L51 assume 8656 == main_~s__state~0; 2540#L52 assume !(2 == main_~blastFlag~0); 2481#L90-1 assume !(4 == main_~blastFlag~0); 2482#L97 assume !(5 == main_~blastFlag~0); 2549#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 2525#L101 assume !false; 2531#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2532#L26 assume !(8466 == main_~s__state~0); 2512#L31 assume !(8512 == main_~s__state~0); 2513#L47 assume 8640 == main_~s__state~0; 2485#L48 assume !(3 == main_~blastFlag~0); 2486#L79-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8656; 2499#L101 [2020-10-20 06:46:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 4 times [2020-10-20 06:46:50,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256526290] [2020-10-20 06:46:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,301 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,313 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,319 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 750960545, now seen corresponding path program 1 times [2020-10-20 06:46:50,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737845304] [2020-10-20 06:46:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737845304] [2020-10-20 06:46:50,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:46:50,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:46:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848336413] [2020-10-20 06:46:50,346 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 06:46:50,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:46:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:46:50,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:46:50,348 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. cyclomatic complexity: 38 Second operand 3 states. [2020-10-20 06:46:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:46:50,365 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2020-10-20 06:46:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:46:50,365 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 142 states and 175 transitions. [2020-10-20 06:46:50,366 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-10-20 06:46:50,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 142 states to 137 states and 167 transitions. [2020-10-20 06:46:50,368 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 85 [2020-10-20 06:46:50,368 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2020-10-20 06:46:50,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 167 transitions. [2020-10-20 06:46:50,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:50,368 INFO L691 BuchiCegarLoop]: Abstraction has 137 states and 167 transitions. [2020-10-20 06:46:50,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states and 167 transitions. [2020-10-20 06:46:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 109. [2020-10-20 06:46:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-20 06:46:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2020-10-20 06:46:50,371 INFO L714 BuchiCegarLoop]: Abstraction has 109 states and 136 transitions. [2020-10-20 06:46:50,371 INFO L594 BuchiCegarLoop]: Abstraction has 109 states and 136 transitions. [2020-10-20 06:46:50,371 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-20 06:46:50,371 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 109 states and 136 transitions. [2020-10-20 06:46:50,372 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-10-20 06:46:50,372 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:50,372 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:50,373 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,373 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,373 INFO L794 eck$LassoCheckResult]: Stem: 2741#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2737#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2738#L101 assume !false; 2789#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2790#L26 assume 8466 == main_~s__state~0; 2781#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2778#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2718#L101 [2020-10-20 06:46:50,373 INFO L796 eck$LassoCheckResult]: Loop: 2718#L101 assume !false; 2719#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2710#L26 assume !(8466 == main_~s__state~0); 2711#L31 assume !(8512 == main_~s__state~0); 2708#L47 assume !(8640 == main_~s__state~0); 2709#L51 assume 8656 == main_~s__state~0; 2811#L52 assume !(2 == main_~blastFlag~0); 2747#L90-1 assume !(4 == main_~blastFlag~0); 2748#L97 assume !(5 == main_~blastFlag~0); 2731#L94-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8640; 2718#L101 [2020-10-20 06:46:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 5 times [2020-10-20 06:46:50,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108553908] [2020-10-20 06:46:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,381 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,388 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1947655960, now seen corresponding path program 1 times [2020-10-20 06:46:50,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058239484] [2020-10-20 06:46:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,392 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,394 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:50,395 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,396 INFO L82 PathProgramCache]: Analyzing trace with hash 163931656, now seen corresponding path program 1 times [2020-10-20 06:46:50,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528212187] [2020-10-20 06:46:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:50,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528212187] [2020-10-20 06:46:50,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:46:50,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:46:50,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317853643] [2020-10-20 06:46:50,445 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:50,445 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:50,445 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:50,445 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:50,445 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:46:50,446 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:50,446 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:50,446 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:50,446 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration9_Loop [2020-10-20 06:46:50,446 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:50,446 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:50,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:50,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:50,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:50,556 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:50,557 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:50,567 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:50,567 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:50,571 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:46:50,572 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~s__hit~0=7} Honda state: {ULTIMATE.start_main_~s__hit~0=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:50,601 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:46:50,601 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:50,629 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:46:50,629 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:46:50,634 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:46:50,655 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:46:50,655 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:46:50,655 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:46:50,655 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:46:50,655 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:46:50,655 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:50,655 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:46:50,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:46:50,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration9_Loop [2020-10-20 06:46:50,656 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:46:50,656 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:46:50,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:50,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:50,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 06:46:50,763 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:46:50,763 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:46:50,769 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 [2020-10-20 06:46:50,770 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:50,770 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:50,770 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:50,771 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-20 06:46:50,771 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:50,772 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-20 06:46:50,772 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:50,774 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 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:50,797 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 [2020-10-20 06:46:50,799 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:46:50,799 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:46:50,799 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:46:50,799 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:46:50,799 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:46:50,800 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:46:50,800 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:46:50,802 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:46:50,804 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:46:50,805 INFO L444 ModelExtractionUtils]: 0 out of 3 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 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:46:50,812 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:46:50,812 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:46:50,812 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:46:50,812 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~s__state~0) = 1*ULTIMATE.start_main_~s__state~0 Supporting invariants [] [2020-10-20 06:46:50,832 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:46:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:50,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:46:50,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:46:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:46:50,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:46:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:46:50,909 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 [2020-10-20 06:46:50,909 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 109 states and 136 transitions. cyclomatic complexity: 36 Second operand 4 states. [2020-10-20 06:46:50,947 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 109 states and 136 transitions. cyclomatic complexity: 36. Second operand 4 states. Result 148 states and 178 transitions. Complement of second has 6 states. [2020-10-20 06:46:50,947 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 [2020-10-20 06:46:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 06:46:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2020-10-20 06:46:50,948 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 7 letters. Loop has 10 letters. [2020-10-20 06:46:50,948 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:50,948 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 17 letters. Loop has 10 letters. [2020-10-20 06:46:50,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:50,949 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 7 letters. Loop has 20 letters. [2020-10-20 06:46:50,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:46:50,949 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 148 states and 178 transitions. [2020-10-20 06:46:50,952 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-10-20 06:46:50,953 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 148 states to 109 states and 132 transitions. [2020-10-20 06:46:50,953 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-10-20 06:46:50,953 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-10-20 06:46:50,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 132 transitions. [2020-10-20 06:46:50,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:50,954 INFO L691 BuchiCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-10-20 06:46:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states and 132 transitions. [2020-10-20 06:46:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-20 06:46:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-20 06:46:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2020-10-20 06:46:50,957 INFO L714 BuchiCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-10-20 06:46:50,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:46:50,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:46:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:46:50,958 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 3 states. [2020-10-20 06:46:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:46:50,974 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-20 06:46:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:46:50,975 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 92 states and 106 transitions. [2020-10-20 06:46:50,976 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2020-10-20 06:46:50,977 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 92 states to 62 states and 71 transitions. [2020-10-20 06:46:50,977 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2020-10-20 06:46:50,977 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-10-20 06:46:50,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 71 transitions. [2020-10-20 06:46:50,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:46:50,978 INFO L691 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-20 06:46:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 71 transitions. [2020-10-20 06:46:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-20 06:46:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-20 06:46:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-20 06:46:50,980 INFO L714 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-20 06:46:50,980 INFO L594 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-20 06:46:50,980 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-20 06:46:50,980 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 71 transitions. [2020-10-20 06:46:50,981 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2020-10-20 06:46:50,981 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:46:50,981 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:46:50,981 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,982 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:46:50,982 INFO L794 eck$LassoCheckResult]: Stem: 3274#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3272#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 3273#L101 assume !false; 3298#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3296#L26 assume 8466 == main_~s__state~0; 3258#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 3248#L59-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 3249#L101 assume !false; 3292#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3288#L26 assume !(8466 == main_~s__state~0); 3282#L31 assume 8512 == main_~s__state~0; 3275#L32 [2020-10-20 06:46:50,982 INFO L796 eck$LassoCheckResult]: Loop: 3275#L32 main_~tmp___1~0 := main_#t~nondet8;havoc main_#t~nondet8; 3259#L71 assume 0 != main_~tmp___1~0;main_~s__state~0 := 8466; 3260#L101 assume !false; 3299#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3297#L26 assume 8466 == main_~s__state~0; 3285#L27 assume !(0 == main_~blastFlag~0); 3295#L59-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 3293#L101 assume !false; 3289#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3284#L26 assume !(8466 == main_~s__state~0); 3283#L31 assume 8512 == main_~s__state~0; 3275#L32 [2020-10-20 06:46:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:50,983 INFO L82 PathProgramCache]: Analyzing trace with hash 21626939, now seen corresponding path program 1 times [2020-10-20 06:46:50,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:50,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192094258] [2020-10-20 06:46:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:50,996 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:51,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:51,011 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1294878776, now seen corresponding path program 1 times [2020-10-20 06:46:51,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:51,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678161425] [2020-10-20 06:46:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:51,026 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:51,030 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:51,032 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:46:51,035 INFO L82 PathProgramCache]: Analyzing trace with hash 937672638, now seen corresponding path program 1 times [2020-10-20 06:46:51,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:46:51,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858948735] [2020-10-20 06:46:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:46:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:51,053 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:46:51,061 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:46:51,074 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:46:51,340 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-20 06:46:51,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 06:46:51 BoogieIcfgContainer [2020-10-20 06:46:51,438 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 06:46:51,439 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:46:51,439 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:46:51,439 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:46:51,440 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:46:46" (3/4) ... [2020-10-20 06:46:51,443 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-20 06:46:51,490 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:46:51,490 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:46:51,494 INFO L168 Benchmark]: Toolchain (without parser) took 6030.52 ms. Allocated memory was 37.7 MB in the beginning and 68.2 MB in the end (delta: 30.4 MB). Free memory was 13.3 MB in the beginning and 19.6 MB in the end (delta: -6.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:46:51,496 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 29.9 MB. Free memory was 16.1 MB in the beginning and 16.1 MB in the end (delta: 28.8 kB). Peak memory consumption was 28.8 kB. Max. memory is 14.3 GB. [2020-10-20 06:46:51,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.23 ms. Allocated memory was 37.7 MB in the beginning and 38.3 MB in the end (delta: 524.3 kB). Free memory was 12.5 MB in the beginning and 12.7 MB in the end (delta: -221.8 kB). Peak memory consumption was 5.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:46:51,498 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.57 ms. Allocated memory is still 38.3 MB. Free memory was 12.7 MB in the beginning and 11.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:46:51,500 INFO L168 Benchmark]: Boogie Preprocessor took 23.95 ms. Allocated memory is still 38.3 MB. Free memory was 11.0 MB in the beginning and 9.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:46:51,501 INFO L168 Benchmark]: RCFGBuilder took 338.74 ms. Allocated memory was 38.3 MB in the beginning and 40.4 MB in the end (delta: 2.1 MB). Free memory was 9.6 MB in the beginning and 11.6 MB in the end (delta: -2.0 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:46:51,506 INFO L168 Benchmark]: BuchiAutomizer took 5272.74 ms. Allocated memory was 40.4 MB in the beginning and 68.2 MB in the end (delta: 27.8 MB). Free memory was 11.4 MB in the beginning and 22.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:46:51,507 INFO L168 Benchmark]: Witness Printer took 51.69 ms. Allocated memory is still 68.2 MB. Free memory was 22.4 MB in the beginning and 20.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:46:51,510 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 29.9 MB. Free memory was 16.1 MB in the beginning and 16.1 MB in the end (delta: 28.8 kB). Peak memory consumption was 28.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 296.23 ms. Allocated memory was 37.7 MB in the beginning and 38.3 MB in the end (delta: 524.3 kB). Free memory was 12.5 MB in the beginning and 12.7 MB in the end (delta: -221.8 kB). Peak memory consumption was 5.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 36.57 ms. Allocated memory is still 38.3 MB. Free memory was 12.7 MB in the beginning and 11.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 23.95 ms. Allocated memory is still 38.3 MB. Free memory was 11.0 MB in the beginning and 9.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 338.74 ms. Allocated memory was 38.3 MB in the beginning and 40.4 MB in the end (delta: 2.1 MB). Free memory was 9.6 MB in the beginning and 11.6 MB in the end (delta: -2.0 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 5272.74 ms. Allocated memory was 40.4 MB in the beginning and 68.2 MB in the end (delta: 27.8 MB). Free memory was 11.4 MB in the beginning and 22.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.3 GB. * Witness Printer took 51.69 ms. Allocated memory is still 68.2 MB. Free memory was 22.4 MB in the beginning and 20.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 13 terminating modules (8 trivial, 5 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * blastFlag + 1 and consists of 4 locations. One deterministic module has affine ranking function -1 * s__state + 8489 and consists of 4 locations. One deterministic module has affine ranking function s__state and consists of 5 locations. One deterministic module has affine ranking function -1 * s__state + 8576 and consists of 5 locations. One deterministic module has affine ranking function s__state and consists of 4 locations. 8 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 62 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.2s and 10 iterations. TraceHistogramMax:2. Analysis of lassos took 3.7s. Construction of modules took 0.3s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 13. Automata minimization 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 155 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 182 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 352 SDtfs, 248 SDslu, 196 SDs, 0 SdLazy, 269 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time LassoAnalysisResults: nont1 unkn0 SFLI4 SFLT1 conc0 concLT4 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf97 lsp52 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq190 hnf91 smp100 dnf177 smp79 tf112 neg94 sie115 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 24ms VariablesStem: 0 VariablesLoop: 1 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 0 MotzkinApplications: 4 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 31]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {NULL=0, NULL=0, NULL=0, NULL=2, NULL=0, \result=0, tmp___1=14, NULL=3, NULL=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6c5c1830=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2cd6fd47=14, NULL=0, s__hit=0, NULL=4, blastFlag=2, s__state=8512} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 31]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L11] int s__state ; [L12] int s__hit = __VERIFIER_nondet_int() ; [L13] int blastFlag ; [L14] int tmp___1; [L16] s__state = 8466 [L17] blastFlag = 0 [L19] COND TRUE 1 [L20] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L26] COND TRUE s__state == 8466 [L59] COND TRUE blastFlag == 0 [L60] blastFlag = 2 [L62] COND FALSE !(\read(s__hit)) [L65] s__state = 8512 [L19] COND TRUE 1 [L20] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L26] COND FALSE !(s__state == 8466) [L31] COND TRUE s__state == 8512 Loop: [L70] tmp___1 = __VERIFIER_nondet_int() [L71] COND TRUE \read(tmp___1) [L72] s__state = 8466 [L19] COND TRUE 1 [L20] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L26] COND TRUE s__state == 8466 [L59] COND FALSE !(blastFlag == 0) [L62] COND FALSE !(\read(s__hit)) [L65] s__state = 8512 [L19] COND TRUE 1 [L20] COND FALSE !(s__state <= 8512 && blastFlag > 2) [L26] COND FALSE !(s__state == 8466) [L31] COND TRUE s__state == 8512 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...