./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 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/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 0.1.25-906a4fb [2020-10-19 18:53:45,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:53:45,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:53:45,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:53:45,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:53:45,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:53:45,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:53:45,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:53:45,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:53:45,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:53:45,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:53:45,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:53:45,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:53:45,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:53:45,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:53:45,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:53:45,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:53:45,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:53:45,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:53:45,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:53:45,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:53:45,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:53:45,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:53:45,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:53:45,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:53:45,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:53:45,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:53:45,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:53:45,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:53:45,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:53:45,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:53:45,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:53:45,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:53:45,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:53:45,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:53:45,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:53:45,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:53:45,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:53:45,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:53:45,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:53:45,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:53:45,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 18:53:45,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:53:45,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:53:45,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:53:45,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:53:45,937 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:53:45,938 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:53:45,938 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:53:45,938 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:53:45,939 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:53:45,939 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:53:45,940 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:53:45,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:53:45,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:53:45,942 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:53:45,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:53:45,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:53:45,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:53:45,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:53:45,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:53:45,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:53:45,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:53:45,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:53:45,945 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:53:45,945 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:53:45,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:53:45,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:53:45,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:53:45,946 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:53:45,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:53:45,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:53:45,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:53:45,947 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:53:45,949 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:53:45,950 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 [2020-10-19 18:53:46,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:53:46,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:53:46,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:53:46,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:53:46,290 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:53:46,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c [2020-10-19 18:53:46,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db59258df/73d3244c2e034fad8000026db448ebd4/FLAG0a2088dcf [2020-10-19 18:53:46,828 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:53:46,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c [2020-10-19 18:53:46,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db59258df/73d3244c2e034fad8000026db448ebd4/FLAG0a2088dcf [2020-10-19 18:53:47,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db59258df/73d3244c2e034fad8000026db448ebd4 [2020-10-19 18:53:47,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:53:47,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:53:47,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:53:47,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:53:47,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:53:47,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec80a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47, skipping insertion in model container [2020-10-19 18:53:47,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:53:47,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:53:47,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:53:47,450 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:53:47,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:53:47,545 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:53:47,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47 WrapperNode [2020-10-19 18:53:47,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:53:47,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:53:47,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:53:47,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:53:47,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:53:47,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:53:47,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:53:47,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:53:47,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... [2020-10-19 18:53:47,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:53:47,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:53:47,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:53:47,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:53:47,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:53:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:53:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:53:47,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:53:47,935 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:53:47,936 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-19 18:53:47,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:53:47 BoogieIcfgContainer [2020-10-19 18:53:47,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:53:47,939 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:53:47,939 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:53:47,943 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:53:47,944 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:53:47,944 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:53:47" (1/3) ... [2020-10-19 18:53:47,946 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43630cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:53:47, skipping insertion in model container [2020-10-19 18:53:47,946 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:53:47,946 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:53:47" (2/3) ... [2020-10-19 18:53:47,947 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@43630cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:53:47, skipping insertion in model container [2020-10-19 18:53:47,947 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:53:47,947 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:53:47" (3/3) ... [2020-10-19 18:53:47,949 INFO L373 chiAutomizerObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-10-19 18:53:48,021 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:53:48,022 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:53:48,022 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:53:48,022 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:53:48,023 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:53:48,023 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:53:48,023 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:53:48,023 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:53:48,043 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states. [2020-10-19 18:53:48,072 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-19 18:53:48,072 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:48,073 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:48,083 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:53:48,083 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-19 18:53:48,083 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:53:48,084 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states. [2020-10-19 18:53:48,086 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-19 18:53:48,087 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:48,087 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:48,087 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-19 18:53:48,088 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-19 18:53:48,097 INFO L794 eck$LassoCheckResult]: Stem: 17#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 14#L-1true havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 6#L101true [2020-10-19 18:53:48,097 INFO L796 eck$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 [2020-10-19 18:53:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:48,106 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-10-19 18:53:48,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:48,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92360773] [2020-10-19 18:53:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:48,225 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:48,243 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:48,268 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 39284085, now seen corresponding path program 1 times [2020-10-19 18:53:48,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:48,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238457708] [2020-10-19 18:53:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:48,280 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:48,285 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:48,288 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:48,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723571, now seen corresponding path program 1 times [2020-10-19 18:53:48,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:48,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003971436] [2020-10-19 18:53:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:48,307 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:48,322 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:48,327 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:48,430 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:48,431 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:48,431 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:48,431 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:48,431 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:53:48,432 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:48,432 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:48,432 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:48,432 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration1_Loop [2020-10-19 18:53:48,433 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:48,433 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:48,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:48,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:48,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:48,562 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:48,563 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:53:48,573 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:48,573 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:48,585 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:53:48,586 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) [2020-10-19 18:53:48,628 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:48,628 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:48,668 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:53:48,668 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:53:48,676 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:53:48,707 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:48,707 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:48,707 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:48,708 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:48,708 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:53:48,708 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:48,708 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:48,708 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:48,708 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration1_Loop [2020-10-19 18:53:48,708 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:48,710 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:48,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:48,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:48,734 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:48,810 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:48,817 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 [2020-10-19 18:53:48,831 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:53:48,834 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:48,834 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:48,835 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:48,835 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:53:48,835 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:48,840 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:53:48,840 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:53:48,844 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 [2020-10-19 18:53:48,875 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:53:48,877 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:48,877 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:48,877 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:48,877 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:53:48,878 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:48,880 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:53:48,880 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:53:48,883 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:53:48,896 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:53:48,897 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) [2020-10-19 18:53:48,913 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:53:48,914 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:53:48,914 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:53:48,915 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~blastFlag~0) = -1*ULTIMATE.start_main_~blastFlag~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:48,952 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:53:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:53:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:53:49,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:49,090 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 18:53:49,092 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states. Second operand 4 states. [2020-10-19 18:53:49,185 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. [2020-10-19 18:53:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-19 18:53:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:53:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2020-10-19 18:53:49,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 2 letters. Loop has 5 letters. [2020-10-19 18:53:49,193 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:49,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 7 letters. Loop has 5 letters. [2020-10-19 18:53:49,194 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:49,195 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 47 transitions. Stem has 2 letters. Loop has 10 letters. [2020-10-19 18:53:49,195 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:49,196 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 85 transitions. [2020-10-19 18:53:49,202 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-19 18:53:49,208 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 38 states and 59 transitions. [2020-10-19 18:53:49,209 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2020-10-19 18:53:49,210 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2020-10-19 18:53:49,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 59 transitions. [2020-10-19 18:53:49,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:49,212 INFO L691 BuchiCegarLoop]: Abstraction has 38 states and 59 transitions. [2020-10-19 18:53:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 59 transitions. [2020-10-19 18:53:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-19 18:53:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 18:53:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 57 transitions. [2020-10-19 18:53:49,250 INFO L714 BuchiCegarLoop]: Abstraction has 36 states and 57 transitions. [2020-10-19 18:53:49,250 INFO L594 BuchiCegarLoop]: Abstraction has 36 states and 57 transitions. [2020-10-19 18:53:49,250 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:53:49,250 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 57 transitions. [2020-10-19 18:53:49,252 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-19 18:53:49,253 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:49,253 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:49,253 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:53:49,254 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-19 18:53:49,254 INFO L794 eck$LassoCheckResult]: Stem: 155#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 153#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 154#L101 assume !false; 138#L20 [2020-10-19 18:53:49,254 INFO L796 eck$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 [2020-10-19 18:53:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:49,255 INFO L82 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2020-10-19 18:53:49,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:49,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136715670] [2020-10-19 18:53:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:49,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:49,280 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:49,284 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:49,285 INFO L82 PathProgramCache]: Analyzing trace with hash 44013377, now seen corresponding path program 1 times [2020-10-19 18:53:49,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:49,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116029614] [2020-10-19 18:53:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:49,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:49,294 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:49,296 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash 297857786, now seen corresponding path program 1 times [2020-10-19 18:53:49,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:49,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234373273] [2020-10-19 18:53:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:49,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234373273] [2020-10-19 18:53:49,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:53:49,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:53:49,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384732515] [2020-10-19 18:53:49,397 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:49,398 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:49,398 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:49,398 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:49,398 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:53:49,398 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:49,398 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:49,398 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:49,399 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration2_Loop [2020-10-19 18:53:49,399 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:49,399 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:49,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:49,408 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:49,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:49,480 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:49,481 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) [2020-10-19 18:53:49,493 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:49,493 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 [2020-10-19 18:53:49,503 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:53:49,503 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) [2020-10-19 18:53:49,549 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:49,549 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:49,555 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:53:49,555 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) [2020-10-19 18:53:49,601 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:49,602 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 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 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 [2020-10-19 18:53:49,650 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:53:49,650 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:53:49,656 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:53:49,688 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:49,688 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:49,688 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:49,689 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:49,689 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:53:49,689 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:49,689 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:49,689 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:49,689 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration2_Loop [2020-10-19 18:53:49,689 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:49,690 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:49,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:49,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:49,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:49,762 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:49,762 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) [2020-10-19 18:53:49,772 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:49,774 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:49,774 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:49,775 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:49,775 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:53:49,775 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:49,781 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:53:49,781 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:53:49,786 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) [2020-10-19 18:53:49,838 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:49,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:49,840 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:49,841 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:49,841 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-19 18:53:49,841 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:49,844 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-19 18:53:49,844 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:53:49,848 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) [2020-10-19 18:53:49,894 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:53:49,898 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:49,899 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:49,899 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:49,899 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:53:49,899 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:49,901 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:53:49,901 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 [2020-10-19 18:53:49,904 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:53:49,908 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:53:49,908 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) [2020-10-19 18:53:49,912 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:53:49,912 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:53:49,912 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:53:49,912 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 [2020-10-19 18:53:49,951 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:53:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:49,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:53:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:49,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:53:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:50,021 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-19 18:53:50,021 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 57 transitions. cyclomatic complexity: 23 Second operand 5 states. [2020-10-19 18:53:50,088 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. [2020-10-19 18:53:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:53:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 18:53:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2020-10-19 18:53:50,091 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 3 letters. Loop has 5 letters. [2020-10-19 18:53:50,091 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:50,091 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 8 letters. Loop has 5 letters. [2020-10-19 18:53:50,091 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:50,092 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 3 letters. Loop has 10 letters. [2020-10-19 18:53:50,092 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:50,093 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 104 states and 155 transitions. [2020-10-19 18:53:50,097 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-10-19 18:53:50,099 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 104 states to 77 states and 121 transitions. [2020-10-19 18:53:50,099 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-10-19 18:53:50,100 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2020-10-19 18:53:50,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 121 transitions. [2020-10-19 18:53:50,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:50,101 INFO L691 BuchiCegarLoop]: Abstraction has 77 states and 121 transitions. [2020-10-19 18:53:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states and 121 transitions. [2020-10-19 18:53:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-19 18:53:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 18:53:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 86 transitions. [2020-10-19 18:53:50,108 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 86 transitions. [2020-10-19 18:53:50,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:53:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:53:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:53:50,113 INFO L87 Difference]: Start difference. First operand 54 states and 86 transitions. Second operand 3 states. [2020-10-19 18:53:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:53:50,152 INFO L93 Difference]: Finished difference Result 90 states and 128 transitions. [2020-10-19 18:53:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:53:50,153 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 90 states and 128 transitions. [2020-10-19 18:53:50,155 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-10-19 18:53:50,157 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 90 states to 87 states and 125 transitions. [2020-10-19 18:53:50,158 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2020-10-19 18:53:50,158 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2020-10-19 18:53:50,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 125 transitions. [2020-10-19 18:53:50,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:50,159 INFO L691 BuchiCegarLoop]: Abstraction has 87 states and 125 transitions. [2020-10-19 18:53:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states and 125 transitions. [2020-10-19 18:53:50,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-19 18:53:50,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-19 18:53:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2020-10-19 18:53:50,167 INFO L714 BuchiCegarLoop]: Abstraction has 85 states and 123 transitions. [2020-10-19 18:53:50,167 INFO L594 BuchiCegarLoop]: Abstraction has 85 states and 123 transitions. [2020-10-19 18:53:50,167 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:53:50,168 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 85 states and 123 transitions. [2020-10-19 18:53:50,169 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-10-19 18:53:50,170 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:50,170 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:50,170 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:53:50,171 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-19 18:53:50,171 INFO L794 eck$LassoCheckResult]: Stem: 493#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 491#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 492#L101 assume !false; 472#L20 [2020-10-19 18:53:50,171 INFO L796 eck$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 [2020-10-19 18:53:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 2 times [2020-10-19 18:53:50,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:50,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137891993] [2020-10-19 18:53:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:50,184 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:50,193 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:50,197 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:50,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1365729718, now seen corresponding path program 1 times [2020-10-19 18:53:50,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:50,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281294347] [2020-10-19 18:53:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:50,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:50,210 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:50,213 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash 644971805, now seen corresponding path program 1 times [2020-10-19 18:53:50,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:50,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094529845] [2020-10-19 18:53:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:50,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094529845] [2020-10-19 18:53:50,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:53:50,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:53:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360314286] [2020-10-19 18:53:50,275 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:50,276 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:50,276 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:50,276 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:50,276 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:53:50,276 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:50,276 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:50,276 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:50,277 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration3_Loop [2020-10-19 18:53:50,277 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:50,277 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:50,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:50,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:50,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:50,349 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:50,349 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) [2020-10-19 18:53:50,361 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:50,362 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:50,369 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:53:50,369 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) [2020-10-19 18:53:50,410 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:50,410 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 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 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 [2020-10-19 18:53:50,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:53:50,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:53:50,446 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:53:50,477 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:50,477 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:50,478 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:50,478 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:50,478 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:53:50,478 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:50,478 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:50,478 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:50,478 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration3_Loop [2020-10-19 18:53:50,479 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:50,479 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:50,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:50,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:50,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:50,556 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:50,556 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) [2020-10-19 18:53:50,574 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:53:50,576 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:50,576 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:50,576 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:50,576 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-19 18:53:50,576 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:50,578 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-19 18:53:50,579 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:50,583 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) [2020-10-19 18:53:50,628 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:50,630 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:50,630 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:50,630 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:50,630 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:53:50,630 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:50,632 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:53:50,632 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:53:50,635 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:53:50,640 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:53:50,640 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) [2020-10-19 18:53:50,660 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:53:50,660 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:53:50,660 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:53:50,661 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 [2020-10-19 18:53:50,692 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:53:50,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:53:50,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:53:50,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:50,767 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-19 18:53:50,767 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 85 states and 123 transitions. cyclomatic complexity: 44 Second operand 5 states. [2020-10-19 18:53:50,848 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. [2020-10-19 18:53:50,849 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 [2020-10-19 18:53:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 18:53:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 39 transitions. [2020-10-19 18:53:50,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 3 letters. Loop has 6 letters. [2020-10-19 18:53:50,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:50,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 9 letters. Loop has 6 letters. [2020-10-19 18:53:50,851 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:50,851 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 39 transitions. Stem has 3 letters. Loop has 12 letters. [2020-10-19 18:53:50,851 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:50,852 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 232 transitions. [2020-10-19 18:53:50,855 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 30 [2020-10-19 18:53:50,857 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 141 states and 196 transitions. [2020-10-19 18:53:50,857 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 47 [2020-10-19 18:53:50,858 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 49 [2020-10-19 18:53:50,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 196 transitions. [2020-10-19 18:53:50,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:50,859 INFO L691 BuchiCegarLoop]: Abstraction has 141 states and 196 transitions. [2020-10-19 18:53:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states and 196 transitions. [2020-10-19 18:53:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 105. [2020-10-19 18:53:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-19 18:53:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2020-10-19 18:53:50,867 INFO L714 BuchiCegarLoop]: Abstraction has 105 states and 148 transitions. [2020-10-19 18:53:50,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:53:50,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:53:50,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:53:50,868 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand 3 states. [2020-10-19 18:53:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:53:50,902 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2020-10-19 18:53:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:53:50,902 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 94 transitions. [2020-10-19 18:53:50,904 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2020-10-19 18:53:50,905 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 61 states and 90 transitions. [2020-10-19 18:53:50,905 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-10-19 18:53:50,905 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-10-19 18:53:50,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 90 transitions. [2020-10-19 18:53:50,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:50,906 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-10-19 18:53:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 90 transitions. [2020-10-19 18:53:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-19 18:53:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-19 18:53:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 90 transitions. [2020-10-19 18:53:50,910 INFO L714 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-10-19 18:53:50,910 INFO L594 BuchiCegarLoop]: Abstraction has 61 states and 90 transitions. [2020-10-19 18:53:50,910 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:53:50,910 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 61 states and 90 transitions. [2020-10-19 18:53:50,911 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 19 [2020-10-19 18:53:50,911 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:50,912 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:50,912 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:50,912 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-19 18:53:50,913 INFO L794 eck$LassoCheckResult]: Stem: 979#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 978#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 953#L101 assume !false; 954#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 951#L26 assume 8466 == main_~s__state~0; 952#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 988#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 985#L101 assume !false; 984#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 982#L26 assume !(8466 == main_~s__state~0); 974#L31 [2020-10-19 18:53:50,913 INFO L796 eck$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 [2020-10-19 18:53:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1523382593, now seen corresponding path program 1 times [2020-10-19 18:53:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:50,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178780470] [2020-10-19 18:53:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:50,961 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:50,984 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,008 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:51,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1623382260, now seen corresponding path program 1 times [2020-10-19 18:53:51,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046570054] [2020-10-19 18:53:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,025 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,037 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,039 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1141286606, now seen corresponding path program 1 times [2020-10-19 18:53:51,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195952401] [2020-10-19 18:53:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:51,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195952401] [2020-10-19 18:53:51,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:53:51,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:53:51,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311932249] [2020-10-19 18:53:51,182 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:51,182 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:51,183 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:51,183 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:51,183 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:53:51,183 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:51,183 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:51,183 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:51,183 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration4_Loop [2020-10-19 18:53:51,183 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:51,183 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:51,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:51,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:51,230 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:51,231 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) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:51,234 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:51,235 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) [2020-10-19 18:53:51,276 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:53:51,276 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 [2020-10-19 18:53:51,282 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:53:51,315 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:51,315 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:51,316 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:51,316 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:51,316 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:53:51,316 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:51,316 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:51,316 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:51,316 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration4_Loop [2020-10-19 18:53:51,316 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:51,316 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:51,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:51,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:51,360 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:51,361 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) [2020-10-19 18:53:51,364 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:53:51,366 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:51,366 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:51,366 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:51,366 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:53:51,366 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:51,368 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:53:51,368 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 [2020-10-19 18:53:51,371 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:53:51,374 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:53:51,374 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) [2020-10-19 18:53:51,377 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:53:51,377 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:53:51,378 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:53:51,378 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 [2020-10-19 18:53:51,410 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:53:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:51,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:53:51,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:51,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:53:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:51,474 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-19 18:53:51,474 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 90 transitions. cyclomatic complexity: 33 Second operand 4 states. [2020-10-19 18:53:51,566 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. [2020-10-19 18:53:51,566 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 [2020-10-19 18:53:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:53:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2020-10-19 18:53:51,567 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 10 letters. Loop has 6 letters. [2020-10-19 18:53:51,567 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:51,567 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 16 letters. Loop has 6 letters. [2020-10-19 18:53:51,568 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:51,568 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 55 transitions. Stem has 10 letters. Loop has 12 letters. [2020-10-19 18:53:51,568 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:51,568 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 281 transitions. [2020-10-19 18:53:51,575 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2020-10-19 18:53:51,576 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 163 states and 245 transitions. [2020-10-19 18:53:51,577 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2020-10-19 18:53:51,578 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2020-10-19 18:53:51,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 245 transitions. [2020-10-19 18:53:51,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:51,578 INFO L691 BuchiCegarLoop]: Abstraction has 163 states and 245 transitions. [2020-10-19 18:53:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 245 transitions. [2020-10-19 18:53:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-10-19 18:53:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-19 18:53:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 183 transitions. [2020-10-19 18:53:51,599 INFO L714 BuchiCegarLoop]: Abstraction has 125 states and 183 transitions. [2020-10-19 18:53:51,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:53:51,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:53:51,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:53:51,600 INFO L87 Difference]: Start difference. First operand 125 states and 183 transitions. Second operand 3 states. [2020-10-19 18:53:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:53:51,642 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-10-19 18:53:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:53:51,643 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 164 states and 223 transitions. [2020-10-19 18:53:51,645 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 36 [2020-10-19 18:53:51,646 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 164 states to 154 states and 211 transitions. [2020-10-19 18:53:51,646 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2020-10-19 18:53:51,646 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-10-19 18:53:51,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 154 states and 211 transitions. [2020-10-19 18:53:51,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:51,647 INFO L691 BuchiCegarLoop]: Abstraction has 154 states and 211 transitions. [2020-10-19 18:53:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states and 211 transitions. [2020-10-19 18:53:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2020-10-19 18:53:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-19 18:53:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 191 transitions. [2020-10-19 18:53:51,652 INFO L714 BuchiCegarLoop]: Abstraction has 134 states and 191 transitions. [2020-10-19 18:53:51,653 INFO L594 BuchiCegarLoop]: Abstraction has 134 states and 191 transitions. [2020-10-19 18:53:51,653 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 18:53:51,653 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 134 states and 191 transitions. [2020-10-19 18:53:51,654 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 35 [2020-10-19 18:53:51,654 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:51,654 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:51,655 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,655 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,655 INFO L794 eck$LassoCheckResult]: Stem: 1590#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1588#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 1589#L101 assume !false; 1668#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 1656#L26 assume 8466 == main_~s__state~0; 1648#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 1646#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 1560#L101 [2020-10-19 18:53:51,655 INFO L796 eck$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 [2020-10-19 18:53:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 1 times [2020-10-19 18:53:51,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942172171] [2020-10-19 18:53:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,672 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,674 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1982564596, now seen corresponding path program 1 times [2020-10-19 18:53:51,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107297718] [2020-10-19 18:53:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:51,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107297718] [2020-10-19 18:53:51,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:53:51,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:53:51,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669818987] [2020-10-19 18:53:51,689 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:53:51,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:53:51,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:53:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:53:51,690 INFO L87 Difference]: Start difference. First operand 134 states and 191 transitions. cyclomatic complexity: 65 Second operand 3 states. [2020-10-19 18:53:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:53:51,716 INFO L93 Difference]: Finished difference Result 182 states and 254 transitions. [2020-10-19 18:53:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:53:51,716 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 254 transitions. [2020-10-19 18:53:51,718 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2020-10-19 18:53:51,720 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 182 states and 254 transitions. [2020-10-19 18:53:51,720 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 70 [2020-10-19 18:53:51,721 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 70 [2020-10-19 18:53:51,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 182 states and 254 transitions. [2020-10-19 18:53:51,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:51,721 INFO L691 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-10-19 18:53:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states and 254 transitions. [2020-10-19 18:53:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-19 18:53:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-19 18:53:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 254 transitions. [2020-10-19 18:53:51,728 INFO L714 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-10-19 18:53:51,728 INFO L594 BuchiCegarLoop]: Abstraction has 182 states and 254 transitions. [2020-10-19 18:53:51,728 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 18:53:51,729 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 182 states and 254 transitions. [2020-10-19 18:53:51,730 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2020-10-19 18:53:51,730 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:51,730 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:51,731 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,731 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,732 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 [2020-10-19 18:53:51,732 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 [2020-10-19 18:53:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 2 times [2020-10-19 18:53:51,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445055385] [2020-10-19 18:53:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,742 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,753 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash 862619384, now seen corresponding path program 1 times [2020-10-19 18:53:51,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788721168] [2020-10-19 18:53:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:51,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788721168] [2020-10-19 18:53:51,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:53:51,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:53:51,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870793683] [2020-10-19 18:53:51,794 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:53:51,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:53:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:53:51,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:53:51,795 INFO L87 Difference]: Start difference. First operand 182 states and 254 transitions. cyclomatic complexity: 80 Second operand 3 states. [2020-10-19 18:53:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:53:51,846 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2020-10-19 18:53:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:53:51,846 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 202 transitions. [2020-10-19 18:53:51,848 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 45 [2020-10-19 18:53:51,850 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 111 states and 141 transitions. [2020-10-19 18:53:51,850 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 58 [2020-10-19 18:53:51,850 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2020-10-19 18:53:51,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 141 transitions. [2020-10-19 18:53:51,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:51,850 INFO L691 BuchiCegarLoop]: Abstraction has 111 states and 141 transitions. [2020-10-19 18:53:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states and 141 transitions. [2020-10-19 18:53:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2020-10-19 18:53:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-19 18:53:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2020-10-19 18:53:51,853 INFO L714 BuchiCegarLoop]: Abstraction has 105 states and 134 transitions. [2020-10-19 18:53:51,854 INFO L594 BuchiCegarLoop]: Abstraction has 105 states and 134 transitions. [2020-10-19 18:53:51,854 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 18:53:51,854 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 134 transitions. [2020-10-19 18:53:51,855 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 45 [2020-10-19 18:53:51,855 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:51,855 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:51,855 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,856 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,856 INFO L794 eck$LassoCheckResult]: Stem: 2250#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2245#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2246#L101 assume !false; 2287#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2288#L26 assume 8466 == main_~s__state~0; 2276#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2271#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2255#L101 [2020-10-19 18:53:51,856 INFO L796 eck$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 [2020-10-19 18:53:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 3 times [2020-10-19 18:53:51,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302042753] [2020-10-19 18:53:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,864 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,874 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,874 INFO L82 PathProgramCache]: Analyzing trace with hash 49895967, now seen corresponding path program 1 times [2020-10-19 18:53:51,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875934605] [2020-10-19 18:53:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:51,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875934605] [2020-10-19 18:53:51,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:53:51,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:53:51,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334766780] [2020-10-19 18:53:51,892 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:53:51,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:53:51,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:53:51,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:53:51,893 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. cyclomatic complexity: 36 Second operand 3 states. [2020-10-19 18:53:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:53:51,916 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2020-10-19 18:53:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:53:51,916 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 146 transitions. [2020-10-19 18:53:51,918 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 56 [2020-10-19 18:53:51,919 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 116 states and 146 transitions. [2020-10-19 18:53:51,919 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2020-10-19 18:53:51,920 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 64 [2020-10-19 18:53:51,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 146 transitions. [2020-10-19 18:53:51,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:51,920 INFO L691 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-10-19 18:53:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states and 146 transitions. [2020-10-19 18:53:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-19 18:53:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-19 18:53:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-10-19 18:53:51,924 INFO L714 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-10-19 18:53:51,924 INFO L594 BuchiCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-10-19 18:53:51,924 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 18:53:51,924 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 116 states and 146 transitions. [2020-10-19 18:53:51,925 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 56 [2020-10-19 18:53:51,925 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:51,925 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:51,926 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,926 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,926 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 [2020-10-19 18:53:51,927 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 [2020-10-19 18:53:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 4 times [2020-10-19 18:53:51,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152606879] [2020-10-19 18:53:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,935 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,941 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,943 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,944 INFO L82 PathProgramCache]: Analyzing trace with hash 750960545, now seen corresponding path program 1 times [2020-10-19 18:53:51,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106437632] [2020-10-19 18:53:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:51,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106437632] [2020-10-19 18:53:51,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:53:51,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:53:51,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123691492] [2020-10-19 18:53:51,959 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 18:53:51,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:53:51,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:53:51,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:53:51,960 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. cyclomatic complexity: 38 Second operand 3 states. [2020-10-19 18:53:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:53:51,968 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2020-10-19 18:53:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:53:51,969 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 142 states and 175 transitions. [2020-10-19 18:53:51,971 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-10-19 18:53:51,972 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 142 states to 137 states and 167 transitions. [2020-10-19 18:53:51,972 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 85 [2020-10-19 18:53:51,972 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2020-10-19 18:53:51,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 167 transitions. [2020-10-19 18:53:51,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:51,973 INFO L691 BuchiCegarLoop]: Abstraction has 137 states and 167 transitions. [2020-10-19 18:53:51,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states and 167 transitions. [2020-10-19 18:53:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 109. [2020-10-19 18:53:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-19 18:53:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2020-10-19 18:53:51,976 INFO L714 BuchiCegarLoop]: Abstraction has 109 states and 136 transitions. [2020-10-19 18:53:51,976 INFO L594 BuchiCegarLoop]: Abstraction has 109 states and 136 transitions. [2020-10-19 18:53:51,976 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-19 18:53:51,976 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 109 states and 136 transitions. [2020-10-19 18:53:51,977 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-10-19 18:53:51,977 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:51,978 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:51,978 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,978 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:51,979 INFO L794 eck$LassoCheckResult]: Stem: 2741#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2737#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 2738#L101 assume !false; 2789#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 2790#L26 assume 8466 == main_~s__state~0; 2781#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 2778#L59-1 assume 0 != main_~s__hit~0;main_~s__state~0 := 8656; 2718#L101 [2020-10-19 18:53:51,979 INFO L796 eck$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 [2020-10-19 18:53:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723569, now seen corresponding path program 5 times [2020-10-19 18:53:51,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900691635] [2020-10-19 18:53:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,987 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:51,993 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:51,996 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:51,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:51,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1947655960, now seen corresponding path program 1 times [2020-10-19 18:53:51,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:51,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397807528] [2020-10-19 18:53:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:52,001 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:52,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:52,005 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash 163931656, now seen corresponding path program 1 times [2020-10-19 18:53:52,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:52,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621197126] [2020-10-19 18:53:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:52,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621197126] [2020-10-19 18:53:52,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:53:52,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:53:52,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592774060] [2020-10-19 18:53:52,064 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:52,064 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:52,065 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:52,065 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:52,065 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:53:52,065 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:52,065 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:52,065 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:52,065 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration9_Loop [2020-10-19 18:53:52,065 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:52,066 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:52,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:52,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:52,077 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:52,160 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:52,161 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) [2020-10-19 18:53:52,177 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:52,177 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 [2020-10-19 18:53:52,182 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:53:52,182 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 [2020-10-19 18:53:52,210 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:53:52,210 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 [2020-10-19 18:53:52,243 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:53:52,243 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:53:52,249 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:53:52,269 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:53:52,269 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:53:52,270 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:53:52,270 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:53:52,270 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:53:52,270 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:52,270 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:53:52,270 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:53:52,270 INFO L133 ssoRankerPreferences]: Filename of dumped script: s3_srvr_1b.cil.c_Iteration9_Loop [2020-10-19 18:53:52,271 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:53:52,271 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:53:52,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:52,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:52,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:53:52,376 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:53:52,376 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) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:52,380 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:53:52,381 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:52,381 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:52,381 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:52,381 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-19 18:53:52,382 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:53:52,383 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-19 18:53:52,383 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:53:52,385 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) [2020-10-19 18:53:52,407 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 18:53:52,409 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:53:52,409 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:53:52,409 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:53:52,409 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:53:52,410 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:53:52,410 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:53:52,410 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:53:52,412 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:53:52,416 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:53:52,416 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 [2020-10-19 18:53:52,419 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:53:52,419 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:53:52,420 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:53:52,420 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 [] [2020-10-19 18:53:52,440 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:53:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:52,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:53:52,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:53:52,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:53:52,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:53:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:53:52,494 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-10-19 18:53:52,495 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 109 states and 136 transitions. cyclomatic complexity: 36 Second operand 4 states. [2020-10-19 18:53:52,543 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. [2020-10-19 18:53:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 18:53:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:53:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2020-10-19 18:53:52,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 7 letters. Loop has 10 letters. [2020-10-19 18:53:52,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:52,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 17 letters. Loop has 10 letters. [2020-10-19 18:53:52,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:52,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 38 transitions. Stem has 7 letters. Loop has 20 letters. [2020-10-19 18:53:52,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:53:52,546 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 148 states and 178 transitions. [2020-10-19 18:53:52,550 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 41 [2020-10-19 18:53:52,551 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 148 states to 109 states and 132 transitions. [2020-10-19 18:53:52,551 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-10-19 18:53:52,551 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-10-19 18:53:52,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 132 transitions. [2020-10-19 18:53:52,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:52,552 INFO L691 BuchiCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-10-19 18:53:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states and 132 transitions. [2020-10-19 18:53:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-19 18:53:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-19 18:53:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2020-10-19 18:53:52,556 INFO L714 BuchiCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-10-19 18:53:52,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:53:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:53:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:53:52,557 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 3 states. [2020-10-19 18:53:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:53:52,582 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-19 18:53:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:53:52,582 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 92 states and 106 transitions. [2020-10-19 18:53:52,583 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2020-10-19 18:53:52,584 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 92 states to 62 states and 71 transitions. [2020-10-19 18:53:52,584 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2020-10-19 18:53:52,584 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-10-19 18:53:52,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 71 transitions. [2020-10-19 18:53:52,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:53:52,585 INFO L691 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-19 18:53:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 71 transitions. [2020-10-19 18:53:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-19 18:53:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-19 18:53:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-19 18:53:52,588 INFO L714 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-19 18:53:52,588 INFO L594 BuchiCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-19 18:53:52,588 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-19 18:53:52,588 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 71 transitions. [2020-10-19 18:53:52,589 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2020-10-19 18:53:52,589 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:53:52,589 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:53:52,590 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:52,590 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:53:52,590 INFO L794 eck$LassoCheckResult]: Stem: 3274#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(17);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3272#L-1 havoc main_#res;havoc main_#t~nondet7, main_#t~nondet8, main_~s__state~0, main_~s__hit~0, main_~blastFlag~0, main_~tmp___1~0;havoc main_~s__state~0;main_~s__hit~0 := main_#t~nondet7;havoc main_#t~nondet7;havoc main_~blastFlag~0;havoc main_~tmp___1~0;main_~s__state~0 := 8466;main_~blastFlag~0 := 0; 3273#L101 assume !false; 3298#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3296#L26 assume 8466 == main_~s__state~0; 3258#L27 assume 0 == main_~blastFlag~0;main_~blastFlag~0 := 2; 3248#L59-1 assume !(0 != main_~s__hit~0);main_~s__state~0 := 8512; 3249#L101 assume !false; 3292#L20 assume !(main_~s__state~0 <= 8512 && main_~blastFlag~0 > 2); 3288#L26 assume !(8466 == main_~s__state~0); 3282#L31 assume 8512 == main_~s__state~0; 3275#L32 [2020-10-19 18:53:52,590 INFO L796 eck$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 [2020-10-19 18:53:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:52,591 INFO L82 PathProgramCache]: Analyzing trace with hash 21626939, now seen corresponding path program 1 times [2020-10-19 18:53:52,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:52,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158894692] [2020-10-19 18:53:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:52,604 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:52,612 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:52,619 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1294878776, now seen corresponding path program 1 times [2020-10-19 18:53:52,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:52,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559730909] [2020-10-19 18:53:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:52,636 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:52,645 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:52,647 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:53:52,656 INFO L82 PathProgramCache]: Analyzing trace with hash 937672638, now seen corresponding path program 1 times [2020-10-19 18:53:52,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:53:52,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972584835] [2020-10-19 18:53:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:53:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:52,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:53:52,682 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:53:52,691 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:53:52,925 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-19 18:53:53,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:53:53 BoogieIcfgContainer [2020-10-19 18:53:53,023 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:53:53,024 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:53:53,024 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:53:53,024 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:53:53,024 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:53:47" (3/4) ... [2020-10-19 18:53:53,027 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-19 18:53:53,074 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:53:53,074 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:53:53,076 INFO L168 Benchmark]: Toolchain (without parser) took 5865.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 215.0 MB). Free memory was 954.6 MB in the beginning and 934.9 MB in the end (delta: 19.7 MB). Peak memory consumption was 234.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:53:53,076 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:53:53,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -179.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:53:53,077 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:53:53,078 INFO L168 Benchmark]: Boogie Preprocessor took 24.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:53:53,078 INFO L168 Benchmark]: RCFGBuilder took 324.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:53:53,079 INFO L168 Benchmark]: BuchiAutomizer took 5084.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.1 MB). Free memory was 1.1 GB in the beginning and 934.9 MB in the end (delta: 168.1 MB). Peak memory consumption was 245.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:53:53,079 INFO L168 Benchmark]: Witness Printer took 50.27 ms. Allocated memory is still 1.2 GB. Free memory is still 934.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:53:53,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 328.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -179.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 324.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5084.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.1 MB). Free memory was 1.1 GB in the beginning and 934.9 MB in the end (delta: 168.1 MB). Peak memory consumption was 245.1 MB. Max. memory is 11.5 GB. * Witness Printer took 50.27 ms. Allocated memory is still 1.2 GB. Free memory is still 934.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 5.0s and 10 iterations. TraceHistogramMax:2. Analysis of lassos took 3.6s. Construction of modules took 0.3s. Büchi inclusion checks took 0.7s. 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=24897} State at position 1 is {NULL=0, NULL=0, NULL=0, NULL=24900, NULL=0, \result=0, tmp___1=10, NULL=24898, NULL=24897, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@69bd25fd=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@20aec017=10, NULL=0, s__hit=0, NULL=24899, 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...