./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/systemc/pipeline.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/systemc/pipeline.cil-1.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 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 23:42:21,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 23:42:21,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 23:42:21,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 23:42:21,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 23:42:21,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 23:42:21,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 23:42:21,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 23:42:21,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 23:42:21,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 23:42:21,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 23:42:21,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 23:42:21,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 23:42:21,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 23:42:21,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 23:42:21,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 23:42:21,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 23:42:21,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 23:42:21,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 23:42:21,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 23:42:21,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 23:42:21,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 23:42:21,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 23:42:21,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 23:42:21,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 23:42:21,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 23:42:21,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 23:42:21,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 23:42:21,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 23:42:21,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 23:42:21,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 23:42:21,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 23:42:21,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 23:42:21,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 23:42:21,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 23:42:21,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 23:42:21,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 23:42:21,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 23:42:21,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 23:42:21,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 23:42:21,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 23:42:21,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-14 23:42:21,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 23:42:21,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 23:42:21,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 23:42:21,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 23:42:21,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 23:42:21,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 23:42:21,245 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 23:42:21,246 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-14 23:42:21,246 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-14 23:42:21,246 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-14 23:42:21,246 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-14 23:42:21,247 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-14 23:42:21,247 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-14 23:42:21,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 23:42:21,247 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 23:42:21,247 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 23:42:21,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 23:42:21,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 23:42:21,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 23:42:21,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-14 23:42:21,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-14 23:42:21,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-14 23:42:21,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 23:42:21,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 23:42:21,249 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-14 23:42:21,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 23:42:21,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-14 23:42:21,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 23:42:21,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 23:42:21,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 23:42:21,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 23:42:21,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 23:42:21,251 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-14 23:42:21,251 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2021-12-14 23:42:21,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 23:42:21,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 23:42:21,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 23:42:21,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 23:42:21,531 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 23:42:21,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/pipeline.cil-1.c [2021-12-14 23:42:21,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d032af34d/1cbf8eb5dc5f42cc9729593bfc036e3d/FLAG7cdadc3e9 [2021-12-14 23:42:21,953 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 23:42:21,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pipeline.cil-1.c [2021-12-14 23:42:21,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d032af34d/1cbf8eb5dc5f42cc9729593bfc036e3d/FLAG7cdadc3e9 [2021-12-14 23:42:22,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d032af34d/1cbf8eb5dc5f42cc9729593bfc036e3d [2021-12-14 23:42:22,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 23:42:22,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 23:42:22,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 23:42:22,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 23:42:22,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 23:42:22,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6b1a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22, skipping insertion in model container [2021-12-14 23:42:22,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 23:42:22,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 23:42:22,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2021-12-14 23:42:22,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 23:42:22,662 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 23:42:22,673 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2021-12-14 23:42:22,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 23:42:22,743 INFO L208 MainTranslator]: Completed translation [2021-12-14 23:42:22,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22 WrapperNode [2021-12-14 23:42:22,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 23:42:22,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 23:42:22,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 23:42:22,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 23:42:22,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,801 INFO L137 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 12, calls inlined = 24, statements flattened = 1037 [2021-12-14 23:42:22,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 23:42:22,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 23:42:22,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 23:42:22,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 23:42:22,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 23:42:22,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 23:42:22,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 23:42:22,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 23:42:22,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (1/1) ... [2021-12-14 23:42:22,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-14 23:42:22,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 23:42:22,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-14 23:42:22,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-14 23:42:23,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 23:42:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 23:42:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 23:42:23,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 23:42:23,110 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 23:42:23,111 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 23:42:23,776 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 23:42:23,783 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 23:42:23,784 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-14 23:42:23,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:42:23 BoogieIcfgContainer [2021-12-14 23:42:23,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 23:42:23,787 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-14 23:42:23,787 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-14 23:42:23,789 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-14 23:42:23,790 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 23:42:23,790 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.12 11:42:22" (1/3) ... [2021-12-14 23:42:23,791 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2f7239ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.12 11:42:23, skipping insertion in model container [2021-12-14 23:42:23,791 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 23:42:23,791 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:42:22" (2/3) ... [2021-12-14 23:42:23,791 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2f7239ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.12 11:42:23, skipping insertion in model container [2021-12-14 23:42:23,791 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-14 23:42:23,792 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:42:23" (3/3) ... [2021-12-14 23:42:23,792 INFO L388 chiAutomizerObserver]: Analyzing ICFG pipeline.cil-1.c [2021-12-14 23:42:23,818 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-14 23:42:23,819 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-14 23:42:23,819 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-14 23:42:23,819 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-14 23:42:23,819 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-14 23:42:23,819 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-14 23:42:23,819 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-14 23:42:23,819 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-14 23:42:23,836 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 422 states, 421 states have (on average 1.814726840855107) internal successors, (764), 421 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:23,865 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 360 [2021-12-14 23:42:23,866 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:23,866 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:23,873 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:23,873 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:23,873 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-14 23:42:23,874 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 422 states, 421 states have (on average 1.814726840855107) internal successors, (764), 421 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:23,900 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 360 [2021-12-14 23:42:23,901 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:23,901 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:23,902 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:23,902 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:23,907 INFO L791 eck$LassoCheckResult]: Stem: 414#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 359#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 31#L256true assume !(1 == ~main_in1_req_up~0); 10#L256-2true assume !(1 == ~main_in2_req_up~0); 25#L267-1true assume !(1 == ~main_sum_req_up~0); 303#L278-1true assume !(1 == ~main_diff_req_up~0); 3#L289-1true assume !(1 == ~main_pres_req_up~0); 255#L300-1true assume !(1 == ~main_dbl_req_up~0); 149#L311-1true assume !(1 == ~main_zero_req_up~0); 328#L322-1true assume !(1 == ~main_clk_req_up~0); 194#L333-1true assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 125#L351-1true assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 19#L356-1true assume 1 == ~S2_presdbl_i~0;~S2_presdbl_st~0 := 0; 119#L361-1true assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 341#L366-1true assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 113#L371-1true assume !(0 == ~main_in1_ev~0); 44#L376-1true assume !(0 == ~main_in2_ev~0); 305#L381-1true assume !(0 == ~main_sum_ev~0); 133#L386-1true assume !(0 == ~main_diff_ev~0); 323#L391-1true assume !(0 == ~main_pres_ev~0); 229#L396-1true assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1; 81#L401-1true assume !(0 == ~main_zero_ev~0); 87#L406-1true assume !(0 == ~main_clk_ev~0); 354#L411-1true assume !(0 == ~main_clk_pos_edge~0); 338#L416-1true assume !(0 == ~main_clk_neg_edge~0); 394#L421-1true assume !(1 == ~main_clk_pos_edge~0); 291#L426-1true assume !(1 == ~main_clk_pos_edge~0); 106#L431-1true assume !(1 == ~main_clk_pos_edge~0); 234#L436-1true assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0; 95#L441-1true assume !(1 == ~main_clk_pos_edge~0); 386#L446-1true assume !(1 == ~main_in1_ev~0); 277#L451-1true assume !(1 == ~main_in2_ev~0); 395#L456-1true assume !(1 == ~main_sum_ev~0); 138#L461-1true assume !(1 == ~main_diff_ev~0); 381#L466-1true assume !(1 == ~main_pres_ev~0); 406#L471-1true assume !(1 == ~main_dbl_ev~0); 26#L476-1true assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 195#L481-1true assume !(1 == ~main_clk_ev~0); 92#L486-1true assume !(1 == ~main_clk_pos_edge~0); 28#L491-1true assume !(1 == ~main_clk_neg_edge~0); 250#L742-1true [2021-12-14 23:42:23,908 INFO L793 eck$LassoCheckResult]: Loop: 250#L742-1true assume !false; 376#L503true start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 206#L229true assume false; 239#L245true assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 256#L509true assume !(1 == ~main_in1_req_up~0); 173#L509-2true assume !(1 == ~main_in2_req_up~0); 339#L520-1true assume !(1 == ~main_sum_req_up~0); 220#L531-1true assume !(1 == ~main_diff_req_up~0); 144#L542-1true assume !(1 == ~main_pres_req_up~0); 393#L553-1true assume !(1 == ~main_dbl_req_up~0); 159#L564-1true assume !(1 == ~main_zero_req_up~0); 245#L575-1true assume !(1 == ~main_clk_req_up~0); 343#L586-1true start_simulation_~kernel_st~0#1 := 3; 369#L605true assume !(0 == ~main_in1_ev~0); 287#L605-2true assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 17#L610-1true assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 193#L615-1true assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 190#L620-1true assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 186#L625-1true assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1; 270#L630-1true assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 329#L635-1true assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 327#L640-1true assume !(0 == ~main_clk_pos_edge~0); 85#L645-1true assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 112#L650-1true assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0; 132#L655-1true assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0; 204#L660-1true assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0; 240#L665-1true assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0; 290#L670-1true assume 1 == ~main_clk_pos_edge~0;~D_print_st~0 := 0; 182#L675-1true assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 237#L680-1true assume !(1 == ~main_in2_ev~0); 312#L685-1true assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 215#L690-1true assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 405#L695-1true assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 275#L700-1true assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2; 268#L705-1true assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 375#L710-1true assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 178#L715-1true assume 1 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 2; 135#L720-1true assume !(1 == ~main_clk_neg_edge~0); 165#L725-1true assume 0 == ~N_generate_st~0; 250#L742-1true [2021-12-14 23:42:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1291793407, now seen corresponding path program 1 times [2021-12-14 23:42:23,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:23,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170907012] [2021-12-14 23:42:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:23,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:24,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:24,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170907012] [2021-12-14 23:42:24,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170907012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:24,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:24,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:24,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134058348] [2021-12-14 23:42:24,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:24,133 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -727719859, now seen corresponding path program 1 times [2021-12-14 23:42:24,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340234082] [2021-12-14 23:42:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:24,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:24,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:24,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340234082] [2021-12-14 23:42:24,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340234082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:24,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:24,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 23:42:24,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941630048] [2021-12-14 23:42:24,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:24,165 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:24,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 23:42:24,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 23:42:24,204 INFO L87 Difference]: Start difference. First operand has 422 states, 421 states have (on average 1.814726840855107) internal successors, (764), 421 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:24,235 INFO L93 Difference]: Finished difference Result 417 states and 745 transitions. [2021-12-14 23:42:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 23:42:24,240 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 417 states and 745 transitions. [2021-12-14 23:42:24,245 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 358 [2021-12-14 23:42:24,251 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 417 states to 416 states and 744 transitions. [2021-12-14 23:42:24,252 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 416 [2021-12-14 23:42:24,254 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 416 [2021-12-14 23:42:24,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 416 states and 744 transitions. [2021-12-14 23:42:24,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:24,257 INFO L681 BuchiCegarLoop]: Abstraction has 416 states and 744 transitions. [2021-12-14 23:42:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states and 744 transitions. [2021-12-14 23:42:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-12-14 23:42:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 416 states have (on average 1.7884615384615385) internal successors, (744), 415 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 744 transitions. [2021-12-14 23:42:24,293 INFO L704 BuchiCegarLoop]: Abstraction has 416 states and 744 transitions. [2021-12-14 23:42:24,294 INFO L587 BuchiCegarLoop]: Abstraction has 416 states and 744 transitions. [2021-12-14 23:42:24,294 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-14 23:42:24,294 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 416 states and 744 transitions. [2021-12-14 23:42:24,297 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 358 [2021-12-14 23:42:24,298 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:24,298 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:24,302 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:24,302 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:24,303 INFO L791 eck$LassoCheckResult]: Stem: 1264#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 1256#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 909#L256 assume !(1 == ~main_in1_req_up~0); 866#L256-2 assume !(1 == ~main_in2_req_up~0); 868#L267-1 assume !(1 == ~main_sum_req_up~0); 897#L278-1 assume !(1 == ~main_diff_req_up~0); 849#L289-1 assume !(1 == ~main_pres_req_up~0); 850#L300-1 assume !(1 == ~main_dbl_req_up~0); 957#L311-1 assume !(1 == ~main_zero_req_up~0); 1102#L322-1 assume !(1 == ~main_clk_req_up~0); 1076#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 1067#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 886#L356-1 assume 1 == ~S2_presdbl_i~0;~S2_presdbl_st~0 := 0; 887#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 1061#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 1055#L371-1 assume !(0 == ~main_in1_ev~0); 937#L376-1 assume !(0 == ~main_in2_ev~0); 938#L381-1 assume !(0 == ~main_sum_ev~0); 1078#L386-1 assume !(0 == ~main_diff_ev~0); 1079#L391-1 assume !(0 == ~main_pres_ev~0); 1186#L396-1 assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1; 1006#L401-1 assume !(0 == ~main_zero_ev~0); 1007#L406-1 assume !(0 == ~main_clk_ev~0); 1016#L411-1 assume !(0 == ~main_clk_pos_edge~0); 1247#L416-1 assume !(0 == ~main_clk_neg_edge~0); 1248#L421-1 assume !(1 == ~main_clk_pos_edge~0); 1233#L426-1 assume !(1 == ~main_clk_pos_edge~0); 1044#L431-1 assume !(1 == ~main_clk_pos_edge~0); 1045#L436-1 assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0; 1025#L441-1 assume !(1 == ~main_clk_pos_edge~0); 1026#L446-1 assume !(1 == ~main_in1_ev~0); 1225#L451-1 assume !(1 == ~main_in2_ev~0); 1226#L456-1 assume !(1 == ~main_sum_ev~0); 1087#L461-1 assume !(1 == ~main_diff_ev~0); 1088#L466-1 assume !(1 == ~main_pres_ev~0); 1261#L471-1 assume !(1 == ~main_dbl_ev~0); 899#L476-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 900#L481-1 assume !(1 == ~main_clk_ev~0); 1023#L486-1 assume !(1 == ~main_clk_pos_edge~0); 904#L491-1 assume !(1 == ~main_clk_neg_edge~0); 905#L742-1 [2021-12-14 23:42:24,303 INFO L793 eck$LassoCheckResult]: Loop: 905#L742-1 assume !false; 1205#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 941#L229 assume !false; 1164#L147 assume !(0 == ~N_generate_st~0); 969#L151 assume !(0 == ~S1_addsub_st~0); 970#L154 assume !(0 == ~S2_presdbl_st~0); 859#L157 assume !(0 == ~S3_zero_st~0); 861#L160 assume !(0 == ~D_print_st~0); 1195#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 1196#L509 assume !(1 == ~main_in1_req_up~0); 863#L509-2 assume !(1 == ~main_in2_req_up~0); 1132#L520-1 assume !(1 == ~main_sum_req_up~0); 1178#L531-1 assume !(1 == ~main_diff_req_up~0); 1096#L542-1 assume !(1 == ~main_pres_req_up~0); 870#L553-1 assume !(1 == ~main_dbl_req_up~0); 1105#L564-1 assume !(1 == ~main_zero_req_up~0); 1115#L575-1 assume !(1 == ~main_clk_req_up~0); 1200#L586-1 start_simulation_~kernel_st~0#1 := 3; 1249#L605 assume !(0 == ~main_in1_ev~0); 1232#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 883#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 884#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 1155#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 1150#L625-1 assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1; 1151#L630-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 1220#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 1243#L640-1 assume !(0 == ~main_clk_pos_edge~0); 1014#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 1015#L650-1 assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0; 1054#L655-1 assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0; 1077#L660-1 assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0; 1163#L665-1 assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0; 1197#L670-1 assume 1 == ~main_clk_pos_edge~0;~D_print_st~0 := 0; 1143#L675-1 assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 1144#L680-1 assume !(1 == ~main_in2_ev~0); 1193#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 1173#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 1174#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 1221#L700-1 assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2; 1218#L705-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 1219#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 1139#L715-1 assume 1 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 2; 1083#L720-1 assume !(1 == ~main_clk_neg_edge~0); 1084#L725-1 assume 0 == ~N_generate_st~0; 905#L742-1 [2021-12-14 23:42:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:24,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1291793407, now seen corresponding path program 2 times [2021-12-14 23:42:24,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:24,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340726009] [2021-12-14 23:42:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:24,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:24,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:24,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340726009] [2021-12-14 23:42:24,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340726009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:24,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:24,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:24,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973791603] [2021-12-14 23:42:24,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:24,368 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:24,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1802774254, now seen corresponding path program 1 times [2021-12-14 23:42:24,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:24,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386232553] [2021-12-14 23:42:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:24,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:24,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:24,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386232553] [2021-12-14 23:42:24,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386232553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:24,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:24,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:24,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138396247] [2021-12-14 23:42:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:24,422 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:24,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:24,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:24,423 INFO L87 Difference]: Start difference. First operand 416 states and 744 transitions. cyclomatic complexity: 330 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:24,627 INFO L93 Difference]: Finished difference Result 760 states and 1352 transitions. [2021-12-14 23:42:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 23:42:24,628 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 760 states and 1352 transitions. [2021-12-14 23:42:24,640 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 703 [2021-12-14 23:42:24,644 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 760 states to 760 states and 1352 transitions. [2021-12-14 23:42:24,645 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 760 [2021-12-14 23:42:24,647 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 760 [2021-12-14 23:42:24,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 760 states and 1352 transitions. [2021-12-14 23:42:24,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:24,665 INFO L681 BuchiCegarLoop]: Abstraction has 760 states and 1352 transitions. [2021-12-14 23:42:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states and 1352 transitions. [2021-12-14 23:42:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2021-12-14 23:42:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 760 states have (on average 1.7789473684210526) internal successors, (1352), 759 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1352 transitions. [2021-12-14 23:42:24,687 INFO L704 BuchiCegarLoop]: Abstraction has 760 states and 1352 transitions. [2021-12-14 23:42:24,688 INFO L587 BuchiCegarLoop]: Abstraction has 760 states and 1352 transitions. [2021-12-14 23:42:24,688 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-14 23:42:24,688 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 760 states and 1352 transitions. [2021-12-14 23:42:24,690 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 703 [2021-12-14 23:42:24,691 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:24,691 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:24,694 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:24,694 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:24,694 INFO L791 eck$LassoCheckResult]: Stem: 2461#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 2453#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 2096#L256 assume !(1 == ~main_in1_req_up~0); 2053#L256-2 assume !(1 == ~main_in2_req_up~0); 2055#L267-1 assume !(1 == ~main_sum_req_up~0); 2084#L278-1 assume !(1 == ~main_diff_req_up~0); 2036#L289-1 assume !(1 == ~main_pres_req_up~0); 2037#L300-1 assume !(1 == ~main_dbl_req_up~0); 2142#L311-1 assume !(1 == ~main_zero_req_up~0); 2290#L322-1 assume !(1 == ~main_clk_req_up~0); 2263#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 2254#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 2073#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 2074#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 2248#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 2242#L371-1 assume !(0 == ~main_in1_ev~0); 2122#L376-1 assume !(0 == ~main_in2_ev~0); 2123#L381-1 assume !(0 == ~main_sum_ev~0); 2265#L386-1 assume !(0 == ~main_diff_ev~0); 2266#L391-1 assume !(0 == ~main_pres_ev~0); 2377#L396-1 assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1; 2193#L401-1 assume !(0 == ~main_zero_ev~0); 2194#L406-1 assume !(0 == ~main_clk_ev~0); 2203#L411-1 assume !(0 == ~main_clk_pos_edge~0); 2444#L416-1 assume !(0 == ~main_clk_neg_edge~0); 2445#L421-1 assume !(1 == ~main_clk_pos_edge~0); 2428#L426-1 assume !(1 == ~main_clk_pos_edge~0); 2231#L431-1 assume !(1 == ~main_clk_pos_edge~0); 2232#L436-1 assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0; 2211#L441-1 assume !(1 == ~main_clk_pos_edge~0); 2212#L446-1 assume !(1 == ~main_in1_ev~0); 2420#L451-1 assume !(1 == ~main_in2_ev~0); 2421#L456-1 assume !(1 == ~main_sum_ev~0); 2275#L461-1 assume !(1 == ~main_diff_ev~0); 2276#L466-1 assume !(1 == ~main_pres_ev~0); 2457#L471-1 assume !(1 == ~main_dbl_ev~0); 2086#L476-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 2087#L481-1 assume !(1 == ~main_clk_ev~0); 2210#L486-1 assume !(1 == ~main_clk_pos_edge~0); 2091#L491-1 assume !(1 == ~main_clk_neg_edge~0); 2092#L742-1 [2021-12-14 23:42:24,694 INFO L793 eck$LassoCheckResult]: Loop: 2092#L742-1 assume !false; 2744#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 2739#L229 assume !false; 2737#L147 assume !(0 == ~N_generate_st~0); 2735#L151 assume !(0 == ~S1_addsub_st~0); 2733#L154 assume !(0 == ~S2_presdbl_st~0); 2046#L157 assume !(0 == ~S3_zero_st~0); 2048#L160 assume !(0 == ~D_print_st~0); 2387#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 2388#L509 assume !(1 == ~main_in1_req_up~0); 2321#L509-2 assume !(1 == ~main_in2_req_up~0); 2322#L520-1 assume !(1 == ~main_sum_req_up~0); 2369#L531-1 assume !(1 == ~main_diff_req_up~0); 2284#L542-1 assume !(1 == ~main_pres_req_up~0); 2057#L553-1 assume !(1 == ~main_dbl_req_up~0); 2293#L564-1 assume !(1 == ~main_zero_req_up~0); 2304#L575-1 assume !(1 == ~main_clk_req_up~0); 2393#L586-1 start_simulation_~kernel_st~0#1 := 3; 2446#L605 assume !(0 == ~main_in1_ev~0); 2427#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 2070#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 2071#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 2346#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 2340#L625-1 assume 0 == ~main_dbl_ev~0;~main_dbl_ev~0 := 1; 2341#L630-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 2415#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 2440#L640-1 assume !(0 == ~main_clk_pos_edge~0); 2201#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 2202#L650-1 assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0; 2241#L655-1 assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0; 2264#L660-1 assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0; 2354#L665-1 assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0; 2389#L670-1 assume 1 == ~main_clk_pos_edge~0;~D_print_st~0 := 0; 2333#L675-1 assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 2334#L680-1 assume !(1 == ~main_in2_ev~0); 2385#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 2364#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 2365#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 2416#L700-1 assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2; 2413#L705-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 2414#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 2329#L715-1 assume 1 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 2; 2270#L720-1 assume !(1 == ~main_clk_neg_edge~0); 2271#L725-1 assume 0 == ~N_generate_st~0; 2092#L742-1 [2021-12-14 23:42:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash 782320317, now seen corresponding path program 1 times [2021-12-14 23:42:24,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:24,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891649494] [2021-12-14 23:42:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:24,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:24,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:24,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891649494] [2021-12-14 23:42:24,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891649494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:24,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:24,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:24,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984075619] [2021-12-14 23:42:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:24,765 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1802774254, now seen corresponding path program 2 times [2021-12-14 23:42:24,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:24,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726646527] [2021-12-14 23:42:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:24,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:24,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726646527] [2021-12-14 23:42:24,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726646527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:24,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:24,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:24,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029327822] [2021-12-14 23:42:24,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:24,801 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:24,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:24,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:24,802 INFO L87 Difference]: Start difference. First operand 760 states and 1352 transitions. cyclomatic complexity: 596 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:24,936 INFO L93 Difference]: Finished difference Result 1669 states and 2937 transitions. [2021-12-14 23:42:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 23:42:24,937 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1669 states and 2937 transitions. [2021-12-14 23:42:24,946 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 1572 [2021-12-14 23:42:24,977 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1669 states to 1669 states and 2937 transitions. [2021-12-14 23:42:24,978 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1669 [2021-12-14 23:42:24,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1669 [2021-12-14 23:42:24,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1669 states and 2937 transitions. [2021-12-14 23:42:24,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:24,981 INFO L681 BuchiCegarLoop]: Abstraction has 1669 states and 2937 transitions. [2021-12-14 23:42:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states and 2937 transitions. [2021-12-14 23:42:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1669. [2021-12-14 23:42:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1669 states have (on average 1.7597363690832835) internal successors, (2937), 1668 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2937 transitions. [2021-12-14 23:42:25,004 INFO L704 BuchiCegarLoop]: Abstraction has 1669 states and 2937 transitions. [2021-12-14 23:42:25,004 INFO L587 BuchiCegarLoop]: Abstraction has 1669 states and 2937 transitions. [2021-12-14 23:42:25,004 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-14 23:42:25,004 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1669 states and 2937 transitions. [2021-12-14 23:42:25,010 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 1572 [2021-12-14 23:42:25,010 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:25,010 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:25,012 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:25,012 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:25,012 INFO L791 eck$LassoCheckResult]: Stem: 4958#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 4937#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 4535#L256 assume !(1 == ~main_in1_req_up~0); 4492#L256-2 assume !(1 == ~main_in2_req_up~0); 4494#L267-1 assume !(1 == ~main_sum_req_up~0); 4523#L278-1 assume !(1 == ~main_diff_req_up~0); 4475#L289-1 assume !(1 == ~main_pres_req_up~0); 4476#L300-1 assume !(1 == ~main_dbl_req_up~0); 4745#L311-1 assume !(1 == ~main_zero_req_up~0); 4744#L322-1 assume !(1 == ~main_clk_req_up~0); 4972#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 4971#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 4512#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 4513#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 4697#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 4691#L371-1 assume !(0 == ~main_in1_ev~0); 4562#L376-1 assume !(0 == ~main_in2_ev~0); 4563#L381-1 assume !(0 == ~main_sum_ev~0); 4966#L386-1 assume !(0 == ~main_diff_ev~0); 4917#L391-1 assume !(0 == ~main_pres_ev~0); 4845#L396-1 assume !(0 == ~main_dbl_ev~0); 4846#L401-1 assume !(0 == ~main_zero_ev~0); 5814#L406-1 assume !(0 == ~main_clk_ev~0); 5813#L411-1 assume !(0 == ~main_clk_pos_edge~0); 5812#L416-1 assume !(0 == ~main_clk_neg_edge~0); 5811#L421-1 assume !(1 == ~main_clk_pos_edge~0); 5810#L426-1 assume !(1 == ~main_clk_pos_edge~0); 5809#L431-1 assume !(1 == ~main_clk_pos_edge~0); 5808#L436-1 assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0; 5804#L441-1 assume !(1 == ~main_clk_pos_edge~0); 5800#L446-1 assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 4889#L451-1 assume !(1 == ~main_in2_ev~0); 4890#L456-1 assume !(1 == ~main_sum_ev~0); 4725#L461-1 assume !(1 == ~main_diff_ev~0); 4726#L466-1 assume !(1 == ~main_pres_ev~0); 4946#L471-1 assume !(1 == ~main_dbl_ev~0); 4525#L476-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 4526#L481-1 assume !(1 == ~main_clk_ev~0); 4656#L486-1 assume !(1 == ~main_clk_pos_edge~0); 4530#L491-1 assume !(1 == ~main_clk_neg_edge~0); 4531#L742-1 [2021-12-14 23:42:25,014 INFO L793 eck$LassoCheckResult]: Loop: 4531#L742-1 assume !false; 4868#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 4566#L229 assume !false; 4817#L147 assume !(0 == ~N_generate_st~0); 4596#L151 assume !(0 == ~S1_addsub_st~0); 4597#L154 assume !(0 == ~S2_presdbl_st~0); 4485#L157 assume !(0 == ~S3_zero_st~0); 4487#L160 assume !(0 == ~D_print_st~0); 4856#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 4857#L509 assume !(1 == ~main_in1_req_up~0); 4777#L509-2 assume !(1 == ~main_in2_req_up~0); 4778#L520-1 assume !(1 == ~main_sum_req_up~0); 5113#L531-1 assume !(1 == ~main_diff_req_up~0); 5111#L542-1 assume !(1 == ~main_pres_req_up~0); 4952#L553-1 assume !(1 == ~main_dbl_req_up~0); 4953#L564-1 assume !(1 == ~main_zero_req_up~0); 5944#L575-1 assume !(1 == ~main_clk_req_up~0); 5942#L586-1 start_simulation_~kernel_st~0#1 := 3; 5941#L605 assume !(0 == ~main_in1_ev~0); 5940#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 5939#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 5938#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 5937#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 4799#L625-1 assume !(0 == ~main_dbl_ev~0); 4800#L630-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 4884#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 4918#L640-1 assume !(0 == ~main_clk_pos_edge~0); 4643#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 4644#L650-1 assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0; 4690#L655-1 assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0; 4715#L660-1 assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0; 4816#L665-1 assume 1 == ~main_clk_pos_edge~0;~S3_zero_st~0 := 0; 4858#L670-1 assume 1 == ~main_clk_pos_edge~0;~D_print_st~0 := 0; 4792#L675-1 assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 4793#L680-1 assume !(1 == ~main_in2_ev~0); 4854#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 4829#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 4830#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 4885#L700-1 assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2; 4882#L705-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 4883#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 4786#L715-1 assume 1 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 2; 4723#L720-1 assume !(1 == ~main_clk_neg_edge~0); 4724#L725-1 assume 0 == ~N_generate_st~0; 4531#L742-1 [2021-12-14 23:42:25,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash 357698877, now seen corresponding path program 1 times [2021-12-14 23:42:25,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:25,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463839316] [2021-12-14 23:42:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:25,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:25,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463839316] [2021-12-14 23:42:25,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463839316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:25,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:25,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:25,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092943724] [2021-12-14 23:42:25,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:25,087 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2069491216, now seen corresponding path program 1 times [2021-12-14 23:42:25,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:25,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290304483] [2021-12-14 23:42:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:25,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:25,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:25,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290304483] [2021-12-14 23:42:25,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290304483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:25,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:25,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:25,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511063419] [2021-12-14 23:42:25,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:25,117 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:25,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:25,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 23:42:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 23:42:25,118 INFO L87 Difference]: Start difference. First operand 1669 states and 2937 transitions. cyclomatic complexity: 1276 Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:25,263 INFO L93 Difference]: Finished difference Result 1999 states and 3465 transitions. [2021-12-14 23:42:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 23:42:25,264 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1999 states and 3465 transitions. [2021-12-14 23:42:25,272 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 1872 [2021-12-14 23:42:25,278 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1999 states to 1999 states and 3465 transitions. [2021-12-14 23:42:25,279 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1999 [2021-12-14 23:42:25,280 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1999 [2021-12-14 23:42:25,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1999 states and 3465 transitions. [2021-12-14 23:42:25,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:25,281 INFO L681 BuchiCegarLoop]: Abstraction has 1999 states and 3465 transitions. [2021-12-14 23:42:25,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states and 3465 transitions. [2021-12-14 23:42:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1999. [2021-12-14 23:42:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1999 states have (on average 1.7333666833416708) internal successors, (3465), 1998 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3465 transitions. [2021-12-14 23:42:25,306 INFO L704 BuchiCegarLoop]: Abstraction has 1999 states and 3465 transitions. [2021-12-14 23:42:25,306 INFO L587 BuchiCegarLoop]: Abstraction has 1999 states and 3465 transitions. [2021-12-14 23:42:25,306 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-14 23:42:25,306 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1999 states and 3465 transitions. [2021-12-14 23:42:25,312 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 1872 [2021-12-14 23:42:25,313 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:25,313 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:25,313 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:25,313 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:25,314 INFO L791 eck$LassoCheckResult]: Stem: 8642#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 8618#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 8211#L256 assume !(1 == ~main_in1_req_up~0); 8167#L256-2 assume !(1 == ~main_in2_req_up~0); 8169#L267-1 assume !(1 == ~main_sum_req_up~0); 8198#L278-1 assume !(1 == ~main_diff_req_up~0); 8150#L289-1 assume !(1 == ~main_pres_req_up~0); 8151#L300-1 assume !(1 == ~main_dbl_req_up~0); 8258#L311-1 assume !(1 == ~main_zero_req_up~0); 8598#L322-1 assume !(1 == ~main_clk_req_up~0); 8389#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 8378#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 8379#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 8653#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 8606#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 8366#L371-1 assume !(0 == ~main_in1_ev~0); 8238#L376-1 assume !(0 == ~main_in2_ev~0); 8239#L381-1 assume !(0 == ~main_sum_ev~0); 8650#L386-1 assume !(0 == ~main_diff_ev~0); 8595#L391-1 assume !(0 == ~main_pres_ev~0); 8520#L396-1 assume !(0 == ~main_dbl_ev~0); 8312#L401-1 assume !(0 == ~main_zero_ev~0); 8313#L406-1 assume !(0 == ~main_clk_ev~0); 8324#L411-1 assume 0 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 1; 8614#L416-1 assume !(0 == ~main_clk_neg_edge~0); 10148#L421-1 assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0; 10122#L426-1 assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0; 10121#L431-1 assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0; 10120#L436-1 assume !(1 == ~main_clk_pos_edge~0); 8333#L441-1 assume !(1 == ~main_clk_pos_edge~0); 8334#L446-1 assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 9017#L451-1 assume !(1 == ~main_in2_ev~0); 10027#L456-1 assume !(1 == ~main_sum_ev~0); 10026#L461-1 assume !(1 == ~main_diff_ev~0); 10025#L466-1 assume !(1 == ~main_pres_ev~0); 10024#L471-1 assume !(1 == ~main_dbl_ev~0); 9006#L476-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 10023#L481-1 assume !(1 == ~main_clk_ev~0); 10022#L486-1 assume !(1 == ~main_clk_pos_edge~0); 10020#L491-1 assume !(1 == ~main_clk_neg_edge~0); 8293#L742-1 [2021-12-14 23:42:25,314 INFO L793 eck$LassoCheckResult]: Loop: 8293#L742-1 assume !false; 10019#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 10015#L229 assume !false; 10014#L147 assume !(0 == ~N_generate_st~0); 10013#L151 assume !(0 == ~S1_addsub_st~0); 10012#L154 assume !(0 == ~S2_presdbl_st~0); 10011#L157 assume !(0 == ~S3_zero_st~0); 10009#L160 assume !(0 == ~D_print_st~0); 10008#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 10007#L509 assume !(1 == ~main_in1_req_up~0); 10005#L509-2 assume !(1 == ~main_in2_req_up~0); 10002#L520-1 assume !(1 == ~main_sum_req_up~0); 9998#L531-1 assume !(1 == ~main_diff_req_up~0); 9994#L542-1 assume !(1 == ~main_pres_req_up~0); 9990#L553-1 assume !(1 == ~main_dbl_req_up~0); 9984#L564-1 assume !(1 == ~main_zero_req_up~0); 9978#L575-1 assume !(1 == ~main_clk_req_up~0); 9975#L586-1 start_simulation_~kernel_st~0#1 := 3; 9973#L605 assume !(0 == ~main_in1_ev~0); 9971#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 9969#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 9967#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 9965#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 9964#L625-1 assume !(0 == ~main_dbl_ev~0); 9962#L630-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 9961#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 9959#L640-1 assume 0 == ~main_clk_pos_edge~0;~main_clk_pos_edge~0 := 1; 9958#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 9957#L650-1 assume 1 == ~main_clk_pos_edge~0;~N_generate_st~0 := 0; 9956#L655-1 assume 1 == ~main_clk_pos_edge~0;~S1_addsub_st~0 := 0; 9954#L660-1 assume 1 == ~main_clk_pos_edge~0;~S2_presdbl_st~0 := 0; 9953#L665-1 assume !(1 == ~main_clk_pos_edge~0); 8532#L670-1 assume !(1 == ~main_clk_pos_edge~0); 8471#L675-1 assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 8472#L680-1 assume !(1 == ~main_in2_ev~0); 8528#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 8505#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 8506#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 8564#L700-1 assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2; 8560#L705-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 8561#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 8466#L715-1 assume !(1 == ~main_clk_pos_edge~0); 8397#L720-1 assume !(1 == ~main_clk_neg_edge~0); 8398#L725-1 assume 0 == ~N_generate_st~0; 8293#L742-1 [2021-12-14 23:42:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 787031863, now seen corresponding path program 1 times [2021-12-14 23:42:25,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:25,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57190566] [2021-12-14 23:42:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:25,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:25,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:25,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57190566] [2021-12-14 23:42:25,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57190566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:25,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:25,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:25,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131685330] [2021-12-14 23:42:25,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:25,379 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:25,379 INFO L85 PathProgramCache]: Analyzing trace with hash -403985164, now seen corresponding path program 1 times [2021-12-14 23:42:25,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:25,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931060752] [2021-12-14 23:42:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:25,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:25,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:25,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931060752] [2021-12-14 23:42:25,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931060752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:25,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:25,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:25,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854644836] [2021-12-14 23:42:25,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:25,422 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:25,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:25,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:25,423 INFO L87 Difference]: Start difference. First operand 1999 states and 3465 transitions. cyclomatic complexity: 1474 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:25,639 INFO L93 Difference]: Finished difference Result 4015 states and 6814 transitions. [2021-12-14 23:42:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 23:42:25,641 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 4015 states and 6814 transitions. [2021-12-14 23:42:25,661 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 3762 [2021-12-14 23:42:25,680 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 4015 states to 4015 states and 6814 transitions. [2021-12-14 23:42:25,680 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4015 [2021-12-14 23:42:25,684 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4015 [2021-12-14 23:42:25,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4015 states and 6814 transitions. [2021-12-14 23:42:25,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:25,689 INFO L681 BuchiCegarLoop]: Abstraction has 4015 states and 6814 transitions. [2021-12-14 23:42:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states and 6814 transitions. [2021-12-14 23:42:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3985. [2021-12-14 23:42:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3985 states, 3985 states have (on average 1.6948557089084064) internal successors, (6754), 3984 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 6754 transitions. [2021-12-14 23:42:25,808 INFO L704 BuchiCegarLoop]: Abstraction has 3985 states and 6754 transitions. [2021-12-14 23:42:25,808 INFO L587 BuchiCegarLoop]: Abstraction has 3985 states and 6754 transitions. [2021-12-14 23:42:25,808 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-14 23:42:25,809 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3985 states and 6754 transitions. [2021-12-14 23:42:25,827 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 3762 [2021-12-14 23:42:25,828 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:25,828 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:25,830 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:25,830 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:25,830 INFO L791 eck$LassoCheckResult]: Stem: 14698#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 14672#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 14235#L256 assume !(1 == ~main_in1_req_up~0); 14191#L256-2 assume !(1 == ~main_in2_req_up~0); 14193#L267-1 assume !(1 == ~main_sum_req_up~0); 14222#L278-1 assume !(1 == ~main_diff_req_up~0); 14174#L289-1 assume !(1 == ~main_pres_req_up~0); 14175#L300-1 assume !(1 == ~main_dbl_req_up~0); 14449#L311-1 assume !(1 == ~main_zero_req_up~0); 14446#L322-1 assume !(1 == ~main_clk_req_up~0); 14519#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 14405#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 14406#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 15390#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 14658#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 14391#L371-1 assume !(0 == ~main_in1_ev~0); 14392#L376-1 assume !(0 == ~main_in2_ev~0); 14785#L381-1 assume !(0 == ~main_sum_ev~0); 14786#L386-1 assume !(0 == ~main_diff_ev~0); 14645#L391-1 assume !(0 == ~main_pres_ev~0); 14557#L396-1 assume !(0 == ~main_dbl_ev~0); 14336#L401-1 assume !(0 == ~main_zero_ev~0); 14337#L406-1 assume !(0 == ~main_clk_ev~0); 14346#L411-1 assume !(0 == ~main_clk_pos_edge~0); 14655#L416-1 assume !(0 == ~main_clk_neg_edge~0); 14656#L421-1 assume !(1 == ~main_clk_pos_edge~0); 14623#L426-1 assume !(1 == ~main_clk_pos_edge~0); 14378#L431-1 assume !(1 == ~main_clk_pos_edge~0); 14379#L436-1 assume !(1 == ~main_clk_pos_edge~0); 14357#L441-1 assume !(1 == ~main_clk_pos_edge~0); 14358#L446-1 assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 14688#L451-1 assume !(1 == ~main_in2_ev~0); 15332#L456-1 assume !(1 == ~main_sum_ev~0); 15330#L461-1 assume !(1 == ~main_diff_ev~0); 15291#L466-1 assume !(1 == ~main_pres_ev~0); 15283#L471-1 assume !(1 == ~main_dbl_ev~0); 14224#L476-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 14225#L481-1 assume !(1 == ~main_clk_ev~0); 15093#L486-1 assume !(1 == ~main_clk_pos_edge~0); 15092#L491-1 assume !(1 == ~main_clk_neg_edge~0); 15213#L742-1 [2021-12-14 23:42:25,830 INFO L793 eck$LassoCheckResult]: Loop: 15213#L742-1 assume !false; 15212#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 15208#L229 assume !false; 15206#L147 assume !(0 == ~N_generate_st~0); 15202#L151 assume !(0 == ~S1_addsub_st~0); 15203#L154 assume !(0 == ~S2_presdbl_st~0); 15204#L157 assume !(0 == ~S3_zero_st~0); 15205#L160 assume !(0 == ~D_print_st~0); 15207#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 15416#L509 assume !(1 == ~main_in1_req_up~0); 15414#L509-2 assume !(1 == ~main_in2_req_up~0); 15411#L520-1 assume !(1 == ~main_sum_req_up~0); 15407#L531-1 assume !(1 == ~main_diff_req_up~0); 15397#L542-1 assume !(1 == ~main_pres_req_up~0); 15393#L553-1 assume !(1 == ~main_dbl_req_up~0); 15388#L564-1 assume !(1 == ~main_zero_req_up~0); 15382#L575-1 assume !(1 == ~main_clk_req_up~0); 15378#L586-1 start_simulation_~kernel_st~0#1 := 3; 15376#L605 assume !(0 == ~main_in1_ev~0); 15374#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 15371#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 15369#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 15366#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 15362#L625-1 assume !(0 == ~main_dbl_ev~0); 15356#L630-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 15352#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 15350#L640-1 assume !(0 == ~main_clk_pos_edge~0); 15318#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 15344#L650-1 assume !(1 == ~main_clk_pos_edge~0); 15314#L655-1 assume !(1 == ~main_clk_pos_edge~0); 15312#L660-1 assume !(1 == ~main_clk_pos_edge~0); 15309#L665-1 assume !(1 == ~main_clk_pos_edge~0); 15303#L670-1 assume !(1 == ~main_clk_pos_edge~0); 15301#L675-1 assume 1 == ~main_in1_ev~0;~main_in1_ev~0 := 2; 15300#L680-1 assume !(1 == ~main_in2_ev~0); 15298#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 15296#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 15295#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 15289#L700-1 assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2; 15282#L705-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 15280#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 15278#L715-1 assume !(1 == ~main_clk_pos_edge~0); 15276#L720-1 assume !(1 == ~main_clk_neg_edge~0); 15219#L725-1 assume 0 == ~N_generate_st~0; 15213#L742-1 [2021-12-14 23:42:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash 615864315, now seen corresponding path program 1 times [2021-12-14 23:42:25,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:25,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023591598] [2021-12-14 23:42:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:25,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:25,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:25,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023591598] [2021-12-14 23:42:25,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023591598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:25,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:25,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:25,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285196236] [2021-12-14 23:42:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:25,856 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1415211856, now seen corresponding path program 1 times [2021-12-14 23:42:25,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:25,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580053712] [2021-12-14 23:42:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:25,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:25,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:25,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580053712] [2021-12-14 23:42:25,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580053712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:25,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:25,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:25,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039532770] [2021-12-14 23:42:25,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:25,881 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:25,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:25,882 INFO L87 Difference]: Start difference. First operand 3985 states and 6754 transitions. cyclomatic complexity: 2785 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:26,110 INFO L93 Difference]: Finished difference Result 4445 states and 7522 transitions. [2021-12-14 23:42:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 23:42:26,111 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 4445 states and 7522 transitions. [2021-12-14 23:42:26,136 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 4162 [2021-12-14 23:42:26,195 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 4445 states to 4445 states and 7522 transitions. [2021-12-14 23:42:26,196 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4445 [2021-12-14 23:42:26,200 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4445 [2021-12-14 23:42:26,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4445 states and 7522 transitions. [2021-12-14 23:42:26,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:26,204 INFO L681 BuchiCegarLoop]: Abstraction has 4445 states and 7522 transitions. [2021-12-14 23:42:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4445 states and 7522 transitions. [2021-12-14 23:42:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4445 to 4415. [2021-12-14 23:42:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4415 states have (on average 1.6901472253680634) internal successors, (7462), 4414 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 7462 transitions. [2021-12-14 23:42:26,265 INFO L704 BuchiCegarLoop]: Abstraction has 4415 states and 7462 transitions. [2021-12-14 23:42:26,265 INFO L587 BuchiCegarLoop]: Abstraction has 4415 states and 7462 transitions. [2021-12-14 23:42:26,265 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-12-14 23:42:26,265 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 4415 states and 7462 transitions. [2021-12-14 23:42:26,278 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 4162 [2021-12-14 23:42:26,278 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:26,279 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:26,279 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:26,279 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:26,279 INFO L791 eck$LassoCheckResult]: Stem: 23123#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 23090#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 22676#L256 assume !(1 == ~main_in1_req_up~0); 22632#L256-2 assume !(1 == ~main_in2_req_up~0); 22634#L267-1 assume !(1 == ~main_sum_req_up~0); 22663#L278-1 assume !(1 == ~main_diff_req_up~0); 22615#L289-1 assume !(1 == ~main_pres_req_up~0); 22616#L300-1 assume !(1 == ~main_dbl_req_up~0); 22723#L311-1 assume !(1 == ~main_zero_req_up~0); 23069#L322-1 assume !(1 == ~main_clk_req_up~0); 23071#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 24690#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 24688#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 24686#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 24684#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 24682#L371-1 assume !(0 == ~main_in1_ev~0); 24680#L376-1 assume !(0 == ~main_in2_ev~0); 24678#L381-1 assume !(0 == ~main_sum_ev~0); 24675#L386-1 assume !(0 == ~main_diff_ev~0); 24673#L391-1 assume !(0 == ~main_pres_ev~0); 24671#L396-1 assume !(0 == ~main_dbl_ev~0); 24669#L401-1 assume !(0 == ~main_zero_ev~0); 24667#L406-1 assume !(0 == ~main_clk_ev~0); 24664#L411-1 assume !(0 == ~main_clk_pos_edge~0); 24662#L416-1 assume !(0 == ~main_clk_neg_edge~0); 24660#L421-1 assume !(1 == ~main_clk_pos_edge~0); 24657#L426-1 assume !(1 == ~main_clk_pos_edge~0); 24655#L431-1 assume !(1 == ~main_clk_pos_edge~0); 24652#L436-1 assume !(1 == ~main_clk_pos_edge~0); 24649#L441-1 assume !(1 == ~main_clk_pos_edge~0); 24646#L446-1 assume !(1 == ~main_in1_ev~0); 24643#L451-1 assume !(1 == ~main_in2_ev~0); 24641#L456-1 assume !(1 == ~main_sum_ev~0); 24569#L461-1 assume !(1 == ~main_diff_ev~0); 24564#L466-1 assume !(1 == ~main_pres_ev~0); 24555#L471-1 assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2; 24556#L476-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 25389#L481-1 assume !(1 == ~main_clk_ev~0); 25387#L486-1 assume !(1 == ~main_clk_pos_edge~0); 25373#L491-1 assume !(1 == ~main_clk_neg_edge~0); 25369#L742-1 [2021-12-14 23:42:26,280 INFO L793 eck$LassoCheckResult]: Loop: 25369#L742-1 assume !false; 25368#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 25364#L229 assume !false; 25362#L147 assume !(0 == ~N_generate_st~0); 25358#L151 assume !(0 == ~S1_addsub_st~0); 25359#L154 assume !(0 == ~S2_presdbl_st~0); 25360#L157 assume !(0 == ~S3_zero_st~0); 25361#L160 assume !(0 == ~D_print_st~0); 25363#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 25459#L509 assume !(1 == ~main_in1_req_up~0); 25457#L509-2 assume !(1 == ~main_in2_req_up~0); 25454#L520-1 assume !(1 == ~main_sum_req_up~0); 25450#L531-1 assume !(1 == ~main_diff_req_up~0); 25448#L542-1 assume !(1 == ~main_pres_req_up~0); 25444#L553-1 assume !(1 == ~main_dbl_req_up~0); 25440#L564-1 assume !(1 == ~main_zero_req_up~0); 25436#L575-1 assume !(1 == ~main_clk_req_up~0); 25433#L586-1 start_simulation_~kernel_st~0#1 := 3; 25431#L605 assume !(0 == ~main_in1_ev~0); 25429#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 25427#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 25425#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 25423#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 25421#L625-1 assume !(0 == ~main_dbl_ev~0); 25418#L630-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 25416#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 25414#L640-1 assume !(0 == ~main_clk_pos_edge~0); 25412#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 25410#L650-1 assume !(1 == ~main_clk_pos_edge~0); 25408#L655-1 assume !(1 == ~main_clk_pos_edge~0); 25406#L660-1 assume !(1 == ~main_clk_pos_edge~0); 25404#L665-1 assume !(1 == ~main_clk_pos_edge~0); 25402#L670-1 assume !(1 == ~main_clk_pos_edge~0); 25400#L675-1 assume !(1 == ~main_in1_ev~0); 25398#L680-1 assume !(1 == ~main_in2_ev~0); 25396#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 25394#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 25392#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 25390#L700-1 assume 1 == ~main_dbl_ev~0;~main_dbl_ev~0 := 2; 24274#L705-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 25388#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 25386#L715-1 assume !(1 == ~main_clk_pos_edge~0); 25385#L720-1 assume !(1 == ~main_clk_neg_edge~0); 25376#L725-1 assume 0 == ~N_generate_st~0; 25369#L742-1 [2021-12-14 23:42:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash 220990263, now seen corresponding path program 1 times [2021-12-14 23:42:26,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:26,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214733428] [2021-12-14 23:42:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:26,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:26,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:26,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214733428] [2021-12-14 23:42:26,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214733428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:26,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:26,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:26,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396044634] [2021-12-14 23:42:26,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:26,320 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash -714147278, now seen corresponding path program 1 times [2021-12-14 23:42:26,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:26,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694665078] [2021-12-14 23:42:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:26,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:26,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694665078] [2021-12-14 23:42:26,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694665078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:26,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:26,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:26,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695257937] [2021-12-14 23:42:26,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:26,370 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:26,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:26,371 INFO L87 Difference]: Start difference. First operand 4415 states and 7462 transitions. cyclomatic complexity: 3063 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:26,540 INFO L93 Difference]: Finished difference Result 5574 states and 9318 transitions. [2021-12-14 23:42:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 23:42:26,543 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 5574 states and 9318 transitions. [2021-12-14 23:42:26,575 INFO L131 ngComponentsAnalysis]: Automaton has 18 accepting balls. 5240 [2021-12-14 23:42:26,599 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 5574 states to 5574 states and 9318 transitions. [2021-12-14 23:42:26,599 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5574 [2021-12-14 23:42:26,602 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5574 [2021-12-14 23:42:26,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5574 states and 9318 transitions. [2021-12-14 23:42:26,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:26,606 INFO L681 BuchiCegarLoop]: Abstraction has 5574 states and 9318 transitions. [2021-12-14 23:42:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states and 9318 transitions. [2021-12-14 23:42:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 5130. [2021-12-14 23:42:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5130 states have (on average 1.6754385964912282) internal successors, (8595), 5129 states have internal predecessors, (8595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 8595 transitions. [2021-12-14 23:42:26,678 INFO L704 BuchiCegarLoop]: Abstraction has 5130 states and 8595 transitions. [2021-12-14 23:42:26,678 INFO L587 BuchiCegarLoop]: Abstraction has 5130 states and 8595 transitions. [2021-12-14 23:42:26,678 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-12-14 23:42:26,679 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5130 states and 8595 transitions. [2021-12-14 23:42:26,688 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 4812 [2021-12-14 23:42:26,688 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:26,689 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:26,689 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:26,689 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:26,689 INFO L791 eck$LassoCheckResult]: Stem: 33094#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 33071#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 32676#L256 assume !(1 == ~main_in1_req_up~0); 32632#L256-2 assume !(1 == ~main_in2_req_up~0); 32634#L267-1 assume !(1 == ~main_sum_req_up~0); 32663#L278-1 assume !(1 == ~main_diff_req_up~0); 32615#L289-1 assume !(1 == ~main_pres_req_up~0); 32616#L300-1 assume !(1 == ~main_dbl_req_up~0); 32724#L311-1 assume !(1 == ~main_zero_req_up~0); 33048#L322-1 assume !(1 == ~main_clk_req_up~0); 33050#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 36466#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 36465#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 36464#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 36463#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 36462#L371-1 assume !(0 == ~main_in1_ev~0); 36461#L376-1 assume !(0 == ~main_in2_ev~0); 36460#L381-1 assume !(0 == ~main_sum_ev~0); 36459#L386-1 assume !(0 == ~main_diff_ev~0); 36458#L391-1 assume !(0 == ~main_pres_ev~0); 36397#L396-1 assume !(0 == ~main_dbl_ev~0); 35475#L401-1 assume !(0 == ~main_zero_ev~0); 35472#L406-1 assume !(0 == ~main_clk_ev~0); 35470#L411-1 assume !(0 == ~main_clk_pos_edge~0); 35468#L416-1 assume !(0 == ~main_clk_neg_edge~0); 35467#L421-1 assume !(1 == ~main_clk_pos_edge~0); 35465#L426-1 assume !(1 == ~main_clk_pos_edge~0); 35461#L431-1 assume !(1 == ~main_clk_pos_edge~0); 35457#L436-1 assume !(1 == ~main_clk_pos_edge~0); 35453#L441-1 assume !(1 == ~main_clk_pos_edge~0); 35452#L446-1 assume !(1 == ~main_in1_ev~0); 35451#L451-1 assume !(1 == ~main_in2_ev~0); 35450#L456-1 assume !(1 == ~main_sum_ev~0); 35449#L461-1 assume !(1 == ~main_diff_ev~0); 35448#L466-1 assume !(1 == ~main_pres_ev~0); 35447#L471-1 assume !(1 == ~main_dbl_ev~0); 35446#L476-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 35445#L481-1 assume !(1 == ~main_clk_ev~0); 35444#L486-1 assume !(1 == ~main_clk_pos_edge~0); 35443#L491-1 assume !(1 == ~main_clk_neg_edge~0); 35390#L742-1 [2021-12-14 23:42:26,692 INFO L793 eck$LassoCheckResult]: Loop: 35390#L742-1 assume !false; 35442#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 35438#L229 assume !false; 35437#L147 assume !(0 == ~N_generate_st~0); 35436#L151 assume !(0 == ~S1_addsub_st~0); 35435#L154 assume !(0 == ~S2_presdbl_st~0); 35434#L157 assume !(0 == ~S3_zero_st~0); 35432#L160 assume !(0 == ~D_print_st~0); 35431#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 35430#L509 assume !(1 == ~main_in1_req_up~0); 35429#L509-2 assume !(1 == ~main_in2_req_up~0); 35428#L520-1 assume !(1 == ~main_sum_req_up~0); 35425#L531-1 assume !(1 == ~main_diff_req_up~0); 35424#L542-1 assume !(1 == ~main_pres_req_up~0); 35423#L553-1 assume !(1 == ~main_dbl_req_up~0); 35422#L564-1 assume !(1 == ~main_zero_req_up~0); 35421#L575-1 assume !(1 == ~main_clk_req_up~0); 35420#L586-1 start_simulation_~kernel_st~0#1 := 3; 35419#L605 assume !(0 == ~main_in1_ev~0); 35418#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 35417#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 35416#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 35415#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 35414#L625-1 assume !(0 == ~main_dbl_ev~0); 35413#L630-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 35412#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 35411#L640-1 assume !(0 == ~main_clk_pos_edge~0); 35410#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 35409#L650-1 assume !(1 == ~main_clk_pos_edge~0); 35408#L655-1 assume !(1 == ~main_clk_pos_edge~0); 35407#L660-1 assume !(1 == ~main_clk_pos_edge~0); 35406#L665-1 assume !(1 == ~main_clk_pos_edge~0); 35405#L670-1 assume !(1 == ~main_clk_pos_edge~0); 35404#L675-1 assume !(1 == ~main_in1_ev~0); 35403#L680-1 assume !(1 == ~main_in2_ev~0); 35402#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 35401#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 35400#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 35399#L700-1 assume !(1 == ~main_dbl_ev~0); 35398#L705-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 35397#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 35396#L715-1 assume !(1 == ~main_clk_pos_edge~0); 35395#L720-1 assume !(1 == ~main_clk_neg_edge~0); 35394#L725-1 assume 0 == ~N_generate_st~0; 35390#L742-1 [2021-12-14 23:42:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:26,693 INFO L85 PathProgramCache]: Analyzing trace with hash 222837305, now seen corresponding path program 1 times [2021-12-14 23:42:26,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:26,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617383591] [2021-12-14 23:42:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:26,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:26,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:26,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617383591] [2021-12-14 23:42:26,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617383591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:26,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:26,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:26,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094768116] [2021-12-14 23:42:26,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:26,734 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash -656888976, now seen corresponding path program 1 times [2021-12-14 23:42:26,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:26,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174847037] [2021-12-14 23:42:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:26,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:26,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:26,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174847037] [2021-12-14 23:42:26,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174847037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:26,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:26,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:26,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229491740] [2021-12-14 23:42:26,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:26,749 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:26,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:26,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:26,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:26,749 INFO L87 Difference]: Start difference. First operand 5130 states and 8595 transitions. cyclomatic complexity: 3481 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:26,943 INFO L93 Difference]: Finished difference Result 9446 states and 15503 transitions. [2021-12-14 23:42:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 23:42:26,944 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9446 states and 15503 transitions. [2021-12-14 23:42:26,972 INFO L131 ngComponentsAnalysis]: Automaton has 26 accepting balls. 8840 [2021-12-14 23:42:26,994 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9446 states to 9446 states and 15503 transitions. [2021-12-14 23:42:26,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9446 [2021-12-14 23:42:26,999 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9446 [2021-12-14 23:42:26,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9446 states and 15503 transitions. [2021-12-14 23:42:27,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:27,006 INFO L681 BuchiCegarLoop]: Abstraction has 9446 states and 15503 transitions. [2021-12-14 23:42:27,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9446 states and 15503 transitions. [2021-12-14 23:42:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9446 to 6978. [2021-12-14 23:42:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6978 states, 6978 states have (on average 1.65262252794497) internal successors, (11532), 6977 states have internal predecessors, (11532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6978 states to 6978 states and 11532 transitions. [2021-12-14 23:42:27,133 INFO L704 BuchiCegarLoop]: Abstraction has 6978 states and 11532 transitions. [2021-12-14 23:42:27,133 INFO L587 BuchiCegarLoop]: Abstraction has 6978 states and 11532 transitions. [2021-12-14 23:42:27,133 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-12-14 23:42:27,133 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6978 states and 11532 transitions. [2021-12-14 23:42:27,145 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 6492 [2021-12-14 23:42:27,145 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:27,146 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:27,146 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:27,146 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:27,146 INFO L791 eck$LassoCheckResult]: Stem: 47732#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 47702#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 47263#L256 assume !(1 == ~main_in1_req_up~0); 47219#L256-2 assume !(1 == ~main_in2_req_up~0); 47221#L267-1 assume !(1 == ~main_sum_req_up~0); 47250#L278-1 assume !(1 == ~main_diff_req_up~0); 47202#L289-1 assume !(1 == ~main_pres_req_up~0); 47203#L300-1 assume !(1 == ~main_dbl_req_up~0); 47310#L311-1 assume !(1 == ~main_zero_req_up~0); 47678#L322-1 assume !(1 == ~main_clk_req_up~0); 47447#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 47435#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 47239#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 47240#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 47428#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 47962#L371-1 assume !(0 == ~main_in1_ev~0); 47290#L376-1 assume !(0 == ~main_in2_ev~0); 47291#L381-1 assume !(0 == ~main_sum_ev~0); 47960#L386-1 assume !(0 == ~main_diff_ev~0); 47674#L391-1 assume !(0 == ~main_pres_ev~0); 47587#L396-1 assume !(0 == ~main_dbl_ev~0); 47588#L401-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 50722#L406-1 assume !(0 == ~main_clk_ev~0); 50721#L411-1 assume !(0 == ~main_clk_pos_edge~0); 50720#L416-1 assume !(0 == ~main_clk_neg_edge~0); 50719#L421-1 assume !(1 == ~main_clk_pos_edge~0); 50718#L426-1 assume !(1 == ~main_clk_pos_edge~0); 50717#L431-1 assume !(1 == ~main_clk_pos_edge~0); 50716#L436-1 assume !(1 == ~main_clk_pos_edge~0); 50715#L441-1 assume !(1 == ~main_clk_pos_edge~0); 50714#L446-1 assume !(1 == ~main_in1_ev~0); 50713#L451-1 assume !(1 == ~main_in2_ev~0); 50712#L456-1 assume !(1 == ~main_sum_ev~0); 50711#L461-1 assume !(1 == ~main_diff_ev~0); 50710#L466-1 assume !(1 == ~main_pres_ev~0); 50709#L471-1 assume !(1 == ~main_dbl_ev~0); 50707#L476-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 50686#L481-1 assume !(1 == ~main_clk_ev~0); 50679#L486-1 assume !(1 == ~main_clk_pos_edge~0); 50671#L491-1 assume !(1 == ~main_clk_neg_edge~0); 50476#L742-1 [2021-12-14 23:42:27,146 INFO L793 eck$LassoCheckResult]: Loop: 50476#L742-1 assume !false; 50656#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 50651#L229 assume !false; 50649#L147 assume !(0 == ~N_generate_st~0); 50647#L151 assume !(0 == ~S1_addsub_st~0); 50645#L154 assume !(0 == ~S2_presdbl_st~0); 50641#L157 assume !(0 == ~S3_zero_st~0); 50637#L160 assume !(0 == ~D_print_st~0); 50635#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 50633#L509 assume !(1 == ~main_in1_req_up~0); 50628#L509-2 assume !(1 == ~main_in2_req_up~0); 50621#L520-1 assume !(1 == ~main_sum_req_up~0); 50612#L531-1 assume !(1 == ~main_diff_req_up~0); 50604#L542-1 assume !(1 == ~main_pres_req_up~0); 50595#L553-1 assume !(1 == ~main_dbl_req_up~0); 50587#L564-1 assume !(1 == ~main_zero_req_up~0); 50579#L575-1 assume !(1 == ~main_clk_req_up~0); 50574#L586-1 start_simulation_~kernel_st~0#1 := 3; 50570#L605 assume !(0 == ~main_in1_ev~0); 50566#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 50562#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 50558#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 50554#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 50550#L625-1 assume !(0 == ~main_dbl_ev~0); 50529#L630-1 assume 0 == ~main_zero_ev~0;~main_zero_ev~0 := 1; 50528#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 50527#L640-1 assume !(0 == ~main_clk_pos_edge~0); 50526#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 50525#L650-1 assume !(1 == ~main_clk_pos_edge~0); 50524#L655-1 assume !(1 == ~main_clk_pos_edge~0); 50523#L660-1 assume !(1 == ~main_clk_pos_edge~0); 50522#L665-1 assume !(1 == ~main_clk_pos_edge~0); 50521#L670-1 assume !(1 == ~main_clk_pos_edge~0); 50520#L675-1 assume !(1 == ~main_in1_ev~0); 50519#L680-1 assume !(1 == ~main_in2_ev~0); 50518#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 50517#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 50516#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 50515#L700-1 assume !(1 == ~main_dbl_ev~0); 50513#L705-1 assume 1 == ~main_zero_ev~0;~main_zero_ev~0 := 2; 50511#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 50509#L715-1 assume !(1 == ~main_clk_pos_edge~0); 50507#L720-1 assume !(1 == ~main_clk_neg_edge~0); 50503#L725-1 assume 0 == ~N_generate_st~0; 50476#L742-1 [2021-12-14 23:42:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1911781047, now seen corresponding path program 1 times [2021-12-14 23:42:27,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:27,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154995123] [2021-12-14 23:42:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:27,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:27,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:27,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154995123] [2021-12-14 23:42:27,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154995123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:27,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:27,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:27,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235554850] [2021-12-14 23:42:27,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:27,168 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash -656888976, now seen corresponding path program 2 times [2021-12-14 23:42:27,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:27,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409737935] [2021-12-14 23:42:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:27,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:27,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409737935] [2021-12-14 23:42:27,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409737935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:27,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:27,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:27,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648975233] [2021-12-14 23:42:27,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:27,179 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:27,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:27,180 INFO L87 Difference]: Start difference. First operand 6978 states and 11532 transitions. cyclomatic complexity: 4570 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:27,293 INFO L93 Difference]: Finished difference Result 12839 states and 21043 transitions. [2021-12-14 23:42:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 23:42:27,294 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12839 states and 21043 transitions. [2021-12-14 23:42:27,328 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 12108 [2021-12-14 23:42:27,428 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12839 states to 12839 states and 21043 transitions. [2021-12-14 23:42:27,428 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12839 [2021-12-14 23:42:27,435 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12839 [2021-12-14 23:42:27,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12839 states and 21043 transitions. [2021-12-14 23:42:27,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:27,443 INFO L681 BuchiCegarLoop]: Abstraction has 12839 states and 21043 transitions. [2021-12-14 23:42:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12839 states and 21043 transitions. [2021-12-14 23:42:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12839 to 12839. [2021-12-14 23:42:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12839 states, 12839 states have (on average 1.6389905755899992) internal successors, (21043), 12838 states have internal predecessors, (21043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12839 states to 12839 states and 21043 transitions. [2021-12-14 23:42:27,637 INFO L704 BuchiCegarLoop]: Abstraction has 12839 states and 21043 transitions. [2021-12-14 23:42:27,637 INFO L587 BuchiCegarLoop]: Abstraction has 12839 states and 21043 transitions. [2021-12-14 23:42:27,637 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-12-14 23:42:27,637 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12839 states and 21043 transitions. [2021-12-14 23:42:27,667 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 12108 [2021-12-14 23:42:27,668 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:27,668 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:27,668 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:27,668 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:27,668 INFO L791 eck$LassoCheckResult]: Stem: 67576#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 67547#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 67091#L256 assume !(1 == ~main_in1_req_up~0); 67047#L256-2 assume !(1 == ~main_in2_req_up~0); 67049#L267-1 assume !(1 == ~main_sum_req_up~0); 67078#L278-1 assume !(1 == ~main_diff_req_up~0); 67029#L289-1 assume !(1 == ~main_pres_req_up~0); 67030#L300-1 assume !(1 == ~main_dbl_req_up~0); 67138#L311-1 assume !(1 == ~main_zero_req_up~0); 67522#L322-1 assume !(1 == ~main_clk_req_up~0); 67524#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 70263#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 70257#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 70256#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 70255#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 70254#L371-1 assume !(0 == ~main_in1_ev~0); 70253#L376-1 assume !(0 == ~main_in2_ev~0); 70252#L381-1 assume !(0 == ~main_sum_ev~0); 70251#L386-1 assume !(0 == ~main_diff_ev~0); 70250#L391-1 assume !(0 == ~main_pres_ev~0); 70249#L396-1 assume !(0 == ~main_dbl_ev~0); 70248#L401-1 assume !(0 == ~main_zero_ev~0); 70247#L406-1 assume !(0 == ~main_clk_ev~0); 70246#L411-1 assume !(0 == ~main_clk_pos_edge~0); 70243#L416-1 assume !(0 == ~main_clk_neg_edge~0); 70240#L421-1 assume !(1 == ~main_clk_pos_edge~0); 70238#L426-1 assume !(1 == ~main_clk_pos_edge~0); 70236#L431-1 assume !(1 == ~main_clk_pos_edge~0); 70234#L436-1 assume !(1 == ~main_clk_pos_edge~0); 70232#L441-1 assume !(1 == ~main_clk_pos_edge~0); 70230#L446-1 assume !(1 == ~main_in1_ev~0); 70228#L451-1 assume !(1 == ~main_in2_ev~0); 70226#L456-1 assume !(1 == ~main_sum_ev~0); 70224#L461-1 assume !(1 == ~main_diff_ev~0); 70222#L466-1 assume !(1 == ~main_pres_ev~0); 70220#L471-1 assume !(1 == ~main_dbl_ev~0); 70217#L476-1 assume !(1 == ~main_zero_ev~0); 70215#L481-1 assume !(1 == ~main_clk_ev~0); 70212#L486-1 assume !(1 == ~main_clk_pos_edge~0); 70170#L491-1 assume !(1 == ~main_clk_neg_edge~0); 70166#L742-1 [2021-12-14 23:42:27,669 INFO L793 eck$LassoCheckResult]: Loop: 70166#L742-1 assume !false; 70165#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 70161#L229 assume !false; 70159#L147 assume !(0 == ~N_generate_st~0); 70155#L151 assume !(0 == ~S1_addsub_st~0); 70156#L154 assume !(0 == ~S2_presdbl_st~0); 70157#L157 assume !(0 == ~S3_zero_st~0); 70158#L160 assume !(0 == ~D_print_st~0); 70160#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 70541#L509 assume !(1 == ~main_in1_req_up~0); 70538#L509-2 assume !(1 == ~main_in2_req_up~0); 70534#L520-1 assume !(1 == ~main_sum_req_up~0); 70522#L531-1 assume !(1 == ~main_diff_req_up~0); 70510#L542-1 assume !(1 == ~main_pres_req_up~0); 70506#L553-1 assume !(1 == ~main_dbl_req_up~0); 70502#L564-1 assume !(1 == ~main_zero_req_up~0); 70498#L575-1 assume !(1 == ~main_clk_req_up~0); 70494#L586-1 start_simulation_~kernel_st~0#1 := 3; 70493#L605 assume !(0 == ~main_in1_ev~0); 70491#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 70489#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 70487#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 70485#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 70483#L625-1 assume !(0 == ~main_dbl_ev~0); 70481#L630-1 assume !(0 == ~main_zero_ev~0); 70375#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 70339#L640-1 assume !(0 == ~main_clk_pos_edge~0); 70338#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 70337#L650-1 assume !(1 == ~main_clk_pos_edge~0); 70336#L655-1 assume !(1 == ~main_clk_pos_edge~0); 70335#L660-1 assume !(1 == ~main_clk_pos_edge~0); 70334#L665-1 assume !(1 == ~main_clk_pos_edge~0); 70333#L670-1 assume !(1 == ~main_clk_pos_edge~0); 70332#L675-1 assume !(1 == ~main_in1_ev~0); 70331#L680-1 assume !(1 == ~main_in2_ev~0); 70330#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 70329#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 70328#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 70327#L700-1 assume !(1 == ~main_dbl_ev~0); 70326#L705-1 assume !(1 == ~main_zero_ev~0); 70324#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 70320#L715-1 assume !(1 == ~main_clk_pos_edge~0); 70316#L720-1 assume !(1 == ~main_clk_neg_edge~0); 70173#L725-1 assume 0 == ~N_generate_st~0; 70166#L742-1 [2021-12-14 23:42:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 1 times [2021-12-14 23:42:27,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:27,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952161739] [2021-12-14 23:42:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:27,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:27,675 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:42:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:27,697 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:42:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1472690384, now seen corresponding path program 1 times [2021-12-14 23:42:27,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:27,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852709840] [2021-12-14 23:42:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:27,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:27,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:27,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852709840] [2021-12-14 23:42:27,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852709840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:27,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:27,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:27,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118775645] [2021-12-14 23:42:27,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:27,713 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:27,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:27,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 23:42:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 23:42:27,714 INFO L87 Difference]: Start difference. First operand 12839 states and 21043 transitions. cyclomatic complexity: 8236 Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:27,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:27,785 INFO L93 Difference]: Finished difference Result 18429 states and 29722 transitions. [2021-12-14 23:42:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 23:42:27,786 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18429 states and 29722 transitions. [2021-12-14 23:42:27,851 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 17278 [2021-12-14 23:42:27,896 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18429 states to 18429 states and 29722 transitions. [2021-12-14 23:42:27,896 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18429 [2021-12-14 23:42:27,911 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18429 [2021-12-14 23:42:27,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18429 states and 29722 transitions. [2021-12-14 23:42:27,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:27,929 INFO L681 BuchiCegarLoop]: Abstraction has 18429 states and 29722 transitions. [2021-12-14 23:42:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18429 states and 29722 transitions. [2021-12-14 23:42:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18429 to 18429. [2021-12-14 23:42:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18429 states, 18429 states have (on average 1.6127841988170817) internal successors, (29722), 18428 states have internal predecessors, (29722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18429 states to 18429 states and 29722 transitions. [2021-12-14 23:42:28,218 INFO L704 BuchiCegarLoop]: Abstraction has 18429 states and 29722 transitions. [2021-12-14 23:42:28,218 INFO L587 BuchiCegarLoop]: Abstraction has 18429 states and 29722 transitions. [2021-12-14 23:42:28,218 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-12-14 23:42:28,219 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18429 states and 29722 transitions. [2021-12-14 23:42:28,260 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 17278 [2021-12-14 23:42:28,261 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:28,261 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:28,261 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:28,261 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:28,261 INFO L791 eck$LassoCheckResult]: Stem: 98859#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 98826#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 98367#L256 assume !(1 == ~main_in1_req_up~0); 98321#L256-2 assume !(1 == ~main_in2_req_up~0); 98323#L267-1 assume !(1 == ~main_sum_req_up~0); 98353#L278-1 assume !(1 == ~main_diff_req_up~0); 98303#L289-1 assume !(1 == ~main_pres_req_up~0); 98304#L300-1 assume !(1 == ~main_dbl_req_up~0); 98415#L311-1 assume !(1 == ~main_zero_req_up~0); 98794#L322-1 assume !(1 == ~main_clk_req_up~0); 98557#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 99445#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 98342#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 98343#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 98538#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 99442#L371-1 assume !(0 == ~main_in1_ev~0); 98394#L376-1 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 98395#L381-1 assume !(0 == ~main_sum_ev~0); 98560#L386-1 assume !(0 == ~main_diff_ev~0); 98561#L391-1 assume !(0 == ~main_pres_ev~0); 98711#L396-1 assume !(0 == ~main_dbl_ev~0); 98472#L401-1 assume !(0 == ~main_zero_ev~0); 98473#L406-1 assume !(0 == ~main_clk_ev~0); 107850#L411-1 assume !(0 == ~main_clk_pos_edge~0); 107848#L416-1 assume !(0 == ~main_clk_neg_edge~0); 107844#L421-1 assume !(1 == ~main_clk_pos_edge~0); 107840#L426-1 assume !(1 == ~main_clk_pos_edge~0); 107837#L431-1 assume !(1 == ~main_clk_pos_edge~0); 107833#L436-1 assume !(1 == ~main_clk_pos_edge~0); 107796#L441-1 assume !(1 == ~main_clk_pos_edge~0); 107215#L446-1 assume !(1 == ~main_in1_ev~0); 101140#L451-1 assume 1 == ~main_in2_ev~0;~main_in2_ev~0 := 2; 101132#L456-1 assume !(1 == ~main_sum_ev~0); 101032#L461-1 assume !(1 == ~main_diff_ev~0); 101029#L466-1 assume !(1 == ~main_pres_ev~0); 101027#L471-1 assume !(1 == ~main_dbl_ev~0); 101025#L476-1 assume !(1 == ~main_zero_ev~0); 101017#L481-1 assume !(1 == ~main_clk_ev~0); 100729#L486-1 assume !(1 == ~main_clk_pos_edge~0); 100724#L491-1 assume !(1 == ~main_clk_neg_edge~0); 100439#L742-1 [2021-12-14 23:42:28,261 INFO L793 eck$LassoCheckResult]: Loop: 100439#L742-1 assume !false; 102441#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 102437#L229 assume !false; 102435#L147 assume !(0 == ~N_generate_st~0); 100706#L151 assume !(0 == ~S1_addsub_st~0); 100705#L154 assume !(0 == ~S2_presdbl_st~0); 100704#L157 assume !(0 == ~S3_zero_st~0); 100702#L160 assume !(0 == ~D_print_st~0); 100700#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 100697#L509 assume !(1 == ~main_in1_req_up~0); 100693#L509-2 assume !(1 == ~main_in2_req_up~0); 100688#L520-1 assume !(1 == ~main_sum_req_up~0); 100679#L531-1 assume !(1 == ~main_diff_req_up~0); 100675#L542-1 assume !(1 == ~main_pres_req_up~0); 100674#L553-1 assume !(1 == ~main_dbl_req_up~0); 102207#L564-1 assume !(1 == ~main_zero_req_up~0); 100506#L575-1 assume !(1 == ~main_clk_req_up~0); 100507#L586-1 start_simulation_~kernel_st~0#1 := 3; 100817#L605 assume !(0 == ~main_in1_ev~0); 100814#L605-2 assume 0 == ~main_in2_ev~0;~main_in2_ev~0 := 1; 100812#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 100811#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 100810#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 100809#L625-1 assume !(0 == ~main_dbl_ev~0); 100804#L630-1 assume !(0 == ~main_zero_ev~0); 100802#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 100800#L640-1 assume !(0 == ~main_clk_pos_edge~0); 100798#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 100796#L650-1 assume !(1 == ~main_clk_pos_edge~0); 100794#L655-1 assume !(1 == ~main_clk_pos_edge~0); 100792#L660-1 assume !(1 == ~main_clk_pos_edge~0); 100790#L665-1 assume !(1 == ~main_clk_pos_edge~0); 100787#L670-1 assume !(1 == ~main_clk_pos_edge~0); 100786#L675-1 assume !(1 == ~main_in1_ev~0); 100785#L680-1 assume 1 == ~main_in2_ev~0;~main_in2_ev~0 := 2; 100783#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 100780#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 100778#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 100776#L700-1 assume !(1 == ~main_dbl_ev~0); 100773#L705-1 assume !(1 == ~main_zero_ev~0); 100770#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 100449#L715-1 assume !(1 == ~main_clk_pos_edge~0); 100446#L720-1 assume !(1 == ~main_clk_neg_edge~0); 100445#L725-1 assume 0 == ~N_generate_st~0; 100439#L742-1 [2021-12-14 23:42:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash -323147977, now seen corresponding path program 1 times [2021-12-14 23:42:28,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054305433] [2021-12-14 23:42:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:28,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:28,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:28,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054305433] [2021-12-14 23:42:28,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054305433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:28,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:28,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:28,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294078911] [2021-12-14 23:42:28,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:28,279 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1079663374, now seen corresponding path program 1 times [2021-12-14 23:42:28,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:28,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295055144] [2021-12-14 23:42:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:28,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:28,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:28,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295055144] [2021-12-14 23:42:28,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295055144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:28,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:28,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:28,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620273415] [2021-12-14 23:42:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:28,289 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:28,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:28,290 INFO L87 Difference]: Start difference. First operand 18429 states and 29722 transitions. cyclomatic complexity: 11325 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:28,571 INFO L93 Difference]: Finished difference Result 33519 states and 53550 transitions. [2021-12-14 23:42:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 23:42:28,572 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33519 states and 53550 transitions. [2021-12-14 23:42:28,687 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 31728 [2021-12-14 23:42:28,773 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33519 states to 33519 states and 53550 transitions. [2021-12-14 23:42:28,773 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33519 [2021-12-14 23:42:28,790 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33519 [2021-12-14 23:42:28,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33519 states and 53550 transitions. [2021-12-14 23:42:28,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:28,912 INFO L681 BuchiCegarLoop]: Abstraction has 33519 states and 53550 transitions. [2021-12-14 23:42:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33519 states and 53550 transitions. [2021-12-14 23:42:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33519 to 33519. [2021-12-14 23:42:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33519 states, 33519 states have (on average 1.597601360422447) internal successors, (53550), 33518 states have internal predecessors, (53550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33519 states to 33519 states and 53550 transitions. [2021-12-14 23:42:29,547 INFO L704 BuchiCegarLoop]: Abstraction has 33519 states and 53550 transitions. [2021-12-14 23:42:29,547 INFO L587 BuchiCegarLoop]: Abstraction has 33519 states and 53550 transitions. [2021-12-14 23:42:29,548 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-12-14 23:42:29,548 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 33519 states and 53550 transitions. [2021-12-14 23:42:29,748 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 31728 [2021-12-14 23:42:29,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:29,748 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:29,749 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:29,749 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:29,750 INFO L791 eck$LassoCheckResult]: Stem: 150847#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 150803#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 150324#L256 assume !(1 == ~main_in1_req_up~0); 150280#L256-2 assume !(1 == ~main_in2_req_up~0); 150282#L267-1 assume !(1 == ~main_sum_req_up~0); 150311#L278-1 assume !(1 == ~main_diff_req_up~0); 150261#L289-1 assume !(1 == ~main_pres_req_up~0); 150262#L300-1 assume !(1 == ~main_dbl_req_up~0); 150376#L311-1 assume !(1 == ~main_zero_req_up~0); 150771#L322-1 assume !(1 == ~main_clk_req_up~0); 150517#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 154238#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 155631#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 155630#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 155629#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 155628#L371-1 assume !(0 == ~main_in1_ev~0); 155627#L376-1 assume !(0 == ~main_in2_ev~0); 155626#L381-1 assume !(0 == ~main_sum_ev~0); 155625#L386-1 assume !(0 == ~main_diff_ev~0); 155624#L391-1 assume !(0 == ~main_pres_ev~0); 155623#L396-1 assume !(0 == ~main_dbl_ev~0); 155622#L401-1 assume !(0 == ~main_zero_ev~0); 155621#L406-1 assume !(0 == ~main_clk_ev~0); 155620#L411-1 assume !(0 == ~main_clk_pos_edge~0); 155619#L416-1 assume !(0 == ~main_clk_neg_edge~0); 155618#L421-1 assume !(1 == ~main_clk_pos_edge~0); 155617#L426-1 assume !(1 == ~main_clk_pos_edge~0); 155616#L431-1 assume !(1 == ~main_clk_pos_edge~0); 155615#L436-1 assume !(1 == ~main_clk_pos_edge~0); 155614#L441-1 assume !(1 == ~main_clk_pos_edge~0); 155613#L446-1 assume !(1 == ~main_in1_ev~0); 155611#L451-1 assume 1 == ~main_in2_ev~0;~main_in2_ev~0 := 2; 155612#L456-1 assume !(1 == ~main_sum_ev~0); 163148#L461-1 assume !(1 == ~main_diff_ev~0); 163147#L466-1 assume !(1 == ~main_pres_ev~0); 163146#L471-1 assume !(1 == ~main_dbl_ev~0); 162653#L476-1 assume !(1 == ~main_zero_ev~0); 162651#L481-1 assume !(1 == ~main_clk_ev~0); 162647#L486-1 assume !(1 == ~main_clk_pos_edge~0); 162643#L491-1 assume !(1 == ~main_clk_neg_edge~0); 156633#L742-1 [2021-12-14 23:42:29,750 INFO L793 eck$LassoCheckResult]: Loop: 156633#L742-1 assume !false; 162639#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 162635#L229 assume !false; 162632#L147 assume !(0 == ~N_generate_st~0); 162631#L151 assume !(0 == ~S1_addsub_st~0); 162630#L154 assume !(0 == ~S2_presdbl_st~0); 162626#L157 assume !(0 == ~S3_zero_st~0); 162621#L160 assume !(0 == ~D_print_st~0); 162617#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 162613#L509 assume !(1 == ~main_in1_req_up~0); 162609#L509-2 assume !(1 == ~main_in2_req_up~0); 162610#L520-1 assume !(1 == ~main_sum_req_up~0); 162627#L531-1 assume !(1 == ~main_diff_req_up~0); 162624#L542-1 assume !(1 == ~main_pres_req_up~0); 162619#L553-1 assume !(1 == ~main_dbl_req_up~0); 162615#L564-1 assume !(1 == ~main_zero_req_up~0); 162611#L575-1 assume !(1 == ~main_clk_req_up~0); 162612#L586-1 start_simulation_~kernel_st~0#1 := 3; 168713#L605 assume !(0 == ~main_in1_ev~0); 168712#L605-2 assume !(0 == ~main_in2_ev~0); 162448#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 168711#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 168710#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 168704#L625-1 assume !(0 == ~main_dbl_ev~0); 168703#L630-1 assume !(0 == ~main_zero_ev~0); 168682#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 168681#L640-1 assume !(0 == ~main_clk_pos_edge~0); 168678#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 168677#L650-1 assume !(1 == ~main_clk_pos_edge~0); 168675#L655-1 assume !(1 == ~main_clk_pos_edge~0); 166943#L660-1 assume !(1 == ~main_clk_pos_edge~0); 166940#L665-1 assume !(1 == ~main_clk_pos_edge~0); 166937#L670-1 assume !(1 == ~main_clk_pos_edge~0); 166934#L675-1 assume !(1 == ~main_in1_ev~0); 156664#L680-1 assume !(1 == ~main_in2_ev~0); 154198#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 156662#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 156658#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 156654#L700-1 assume !(1 == ~main_dbl_ev~0); 156652#L705-1 assume !(1 == ~main_zero_ev~0); 156650#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 156647#L715-1 assume !(1 == ~main_clk_pos_edge~0); 156643#L720-1 assume !(1 == ~main_clk_neg_edge~0); 156641#L725-1 assume 0 == ~N_generate_st~0; 156633#L742-1 [2021-12-14 23:42:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:29,751 INFO L85 PathProgramCache]: Analyzing trace with hash -457161483, now seen corresponding path program 1 times [2021-12-14 23:42:29,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:29,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337063788] [2021-12-14 23:42:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:29,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:29,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337063788] [2021-12-14 23:42:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337063788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:29,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:29,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:29,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378772269] [2021-12-14 23:42:29,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:29,824 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1332141774, now seen corresponding path program 1 times [2021-12-14 23:42:29,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:29,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336152885] [2021-12-14 23:42:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:29,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:29,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:29,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336152885] [2021-12-14 23:42:29,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336152885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:29,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:29,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:29,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223265447] [2021-12-14 23:42:29,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:29,858 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:29,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:29,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:29,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:29,859 INFO L87 Difference]: Start difference. First operand 33519 states and 53550 transitions. cyclomatic complexity: 20095 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:30,298 INFO L93 Difference]: Finished difference Result 34717 states and 54842 transitions. [2021-12-14 23:42:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 23:42:30,299 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34717 states and 54842 transitions. [2021-12-14 23:42:30,488 INFO L131 ngComponentsAnalysis]: Automaton has 66 accepting balls. 32815 [2021-12-14 23:42:30,560 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34717 states to 34717 states and 54842 transitions. [2021-12-14 23:42:30,560 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34717 [2021-12-14 23:42:30,576 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 34717 [2021-12-14 23:42:30,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34717 states and 54842 transitions. [2021-12-14 23:42:30,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:30,599 INFO L681 BuchiCegarLoop]: Abstraction has 34717 states and 54842 transitions. [2021-12-14 23:42:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34717 states and 54842 transitions. [2021-12-14 23:42:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34717 to 33519. [2021-12-14 23:42:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33519 states, 33519 states have (on average 1.5798800680211222) internal successors, (52956), 33518 states have internal predecessors, (52956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33519 states to 33519 states and 52956 transitions. [2021-12-14 23:42:31,009 INFO L704 BuchiCegarLoop]: Abstraction has 33519 states and 52956 transitions. [2021-12-14 23:42:31,009 INFO L587 BuchiCegarLoop]: Abstraction has 33519 states and 52956 transitions. [2021-12-14 23:42:31,009 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-12-14 23:42:31,009 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 33519 states and 52956 transitions. [2021-12-14 23:42:31,217 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 31728 [2021-12-14 23:42:31,228 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:31,229 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:31,229 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:31,229 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:31,229 INFO L791 eck$LassoCheckResult]: Stem: 219031#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 219003#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 218571#L256 assume !(1 == ~main_in1_req_up~0); 218527#L256-2 assume !(1 == ~main_in2_req_up~0); 218529#L267-1 assume !(1 == ~main_sum_req_up~0); 218558#L278-1 assume !(1 == ~main_diff_req_up~0); 218508#L289-1 assume !(1 == ~main_pres_req_up~0); 218509#L300-1 assume !(1 == ~main_dbl_req_up~0); 218622#L311-1 assume !(1 == ~main_zero_req_up~0); 218981#L322-1 assume !(1 == ~main_clk_req_up~0); 218983#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 223895#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 223893#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 223891#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 223889#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 223887#L371-1 assume !(0 == ~main_in1_ev~0); 223885#L376-1 assume !(0 == ~main_in2_ev~0); 223883#L381-1 assume !(0 == ~main_sum_ev~0); 223881#L386-1 assume !(0 == ~main_diff_ev~0); 223879#L391-1 assume !(0 == ~main_pres_ev~0); 223877#L396-1 assume !(0 == ~main_dbl_ev~0); 223875#L401-1 assume !(0 == ~main_zero_ev~0); 223873#L406-1 assume !(0 == ~main_clk_ev~0); 223871#L411-1 assume !(0 == ~main_clk_pos_edge~0); 223869#L416-1 assume !(0 == ~main_clk_neg_edge~0); 223867#L421-1 assume !(1 == ~main_clk_pos_edge~0); 223865#L426-1 assume !(1 == ~main_clk_pos_edge~0); 223863#L431-1 assume !(1 == ~main_clk_pos_edge~0); 223861#L436-1 assume !(1 == ~main_clk_pos_edge~0); 223859#L441-1 assume !(1 == ~main_clk_pos_edge~0); 223857#L446-1 assume !(1 == ~main_in1_ev~0); 223845#L451-1 assume !(1 == ~main_in2_ev~0); 223839#L456-1 assume !(1 == ~main_sum_ev~0); 223833#L461-1 assume !(1 == ~main_diff_ev~0); 223830#L466-1 assume !(1 == ~main_pres_ev~0); 223827#L471-1 assume !(1 == ~main_dbl_ev~0); 223824#L476-1 assume !(1 == ~main_zero_ev~0); 223819#L481-1 assume !(1 == ~main_clk_ev~0); 223818#L486-1 assume !(1 == ~main_clk_pos_edge~0); 223804#L491-1 assume !(1 == ~main_clk_neg_edge~0); 223799#L742-1 [2021-12-14 23:42:31,230 INFO L793 eck$LassoCheckResult]: Loop: 223799#L742-1 assume !false; 223792#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 223785#L229 assume !false; 223784#L147 assume !(0 == ~N_generate_st~0); 223778#L151 assume !(0 == ~S1_addsub_st~0); 223772#L154 assume !(0 == ~S2_presdbl_st~0); 223765#L157 assume !(0 == ~S3_zero_st~0); 223755#L160 assume !(0 == ~D_print_st~0); 223750#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 223746#L509 assume !(1 == ~main_in1_req_up~0); 223740#L509-2 assume !(1 == ~main_in2_req_up~0); 223741#L520-1 assume !(1 == ~main_sum_req_up~0); 223974#L531-1 assume !(1 == ~main_diff_req_up~0); 223970#L542-1 assume !(1 == ~main_pres_req_up~0); 223947#L553-1 assume !(1 == ~main_dbl_req_up~0); 223900#L564-1 assume !(1 == ~main_zero_req_up~0); 223897#L575-1 assume !(1 == ~main_clk_req_up~0); 223894#L586-1 start_simulation_~kernel_st~0#1 := 3; 223892#L605 assume !(0 == ~main_in1_ev~0); 223890#L605-2 assume !(0 == ~main_in2_ev~0); 223888#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 223886#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 223884#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 223882#L625-1 assume !(0 == ~main_dbl_ev~0); 223880#L630-1 assume !(0 == ~main_zero_ev~0); 223878#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 223876#L640-1 assume !(0 == ~main_clk_pos_edge~0); 223874#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 223872#L650-1 assume !(1 == ~main_clk_pos_edge~0); 223870#L655-1 assume !(1 == ~main_clk_pos_edge~0); 223868#L660-1 assume !(1 == ~main_clk_pos_edge~0); 223866#L665-1 assume !(1 == ~main_clk_pos_edge~0); 223864#L670-1 assume !(1 == ~main_clk_pos_edge~0); 223862#L675-1 assume !(1 == ~main_in1_ev~0); 223860#L680-1 assume !(1 == ~main_in2_ev~0); 223858#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 223846#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 223840#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 223834#L700-1 assume !(1 == ~main_dbl_ev~0); 223831#L705-1 assume !(1 == ~main_zero_ev~0); 223828#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 223825#L715-1 assume !(1 == ~main_clk_pos_edge~0); 223820#L720-1 assume !(1 == ~main_clk_neg_edge~0); 223807#L725-1 assume 0 == ~N_generate_st~0; 223799#L742-1 [2021-12-14 23:42:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 2 times [2021-12-14 23:42:31,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:31,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892352125] [2021-12-14 23:42:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:31,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:31,243 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:42:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:31,261 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:42:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1332141774, now seen corresponding path program 2 times [2021-12-14 23:42:31,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:31,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594588694] [2021-12-14 23:42:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:31,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:31,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:31,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594588694] [2021-12-14 23:42:31,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594588694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:31,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:31,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 23:42:31,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179684872] [2021-12-14 23:42:31,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:31,275 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:31,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 23:42:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 23:42:31,276 INFO L87 Difference]: Start difference. First operand 33519 states and 52956 transitions. cyclomatic complexity: 19501 Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:31,392 INFO L93 Difference]: Finished difference Result 44288 states and 68290 transitions. [2021-12-14 23:42:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 23:42:31,393 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44288 states and 68290 transitions. [2021-12-14 23:42:31,703 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 41518 [2021-12-14 23:42:31,806 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44288 states to 44288 states and 68290 transitions. [2021-12-14 23:42:31,807 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44288 [2021-12-14 23:42:31,836 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44288 [2021-12-14 23:42:31,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44288 states and 68290 transitions. [2021-12-14 23:42:31,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:31,881 INFO L681 BuchiCegarLoop]: Abstraction has 44288 states and 68290 transitions. [2021-12-14 23:42:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44288 states and 68290 transitions. [2021-12-14 23:42:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44288 to 44288. [2021-12-14 23:42:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44288 states, 44288 states have (on average 1.5419526734104045) internal successors, (68290), 44287 states have internal predecessors, (68290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44288 states to 44288 states and 68290 transitions. [2021-12-14 23:42:32,467 INFO L704 BuchiCegarLoop]: Abstraction has 44288 states and 68290 transitions. [2021-12-14 23:42:32,467 INFO L587 BuchiCegarLoop]: Abstraction has 44288 states and 68290 transitions. [2021-12-14 23:42:32,468 INFO L425 BuchiCegarLoop]: ======== Iteration 14============ [2021-12-14 23:42:32,468 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44288 states and 68290 transitions. [2021-12-14 23:42:32,569 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 41518 [2021-12-14 23:42:32,570 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:32,570 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:32,571 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:32,571 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:32,571 INFO L791 eck$LassoCheckResult]: Stem: 296891#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 296845#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 296385#L256 assume !(1 == ~main_in1_req_up~0); 296340#L256-2 assume !(1 == ~main_in2_req_up~0); 296342#L267-1 assume !(1 == ~main_sum_req_up~0); 296372#L278-1 assume !(1 == ~main_diff_req_up~0); 296321#L289-1 assume !(1 == ~main_pres_req_up~0); 296322#L300-1 assume !(1 == ~main_dbl_req_up~0); 300482#L311-1 assume !(1 == ~main_zero_req_up~0); 300479#L322-1 assume !(1 == ~main_clk_req_up~0); 300480#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 304645#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 304644#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 304643#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 304642#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 304641#L371-1 assume !(0 == ~main_in1_ev~0); 304640#L376-1 assume !(0 == ~main_in2_ev~0); 304639#L381-1 assume !(0 == ~main_sum_ev~0); 304638#L386-1 assume !(0 == ~main_diff_ev~0); 304637#L391-1 assume !(0 == ~main_pres_ev~0); 304636#L396-1 assume !(0 == ~main_dbl_ev~0); 304635#L401-1 assume !(0 == ~main_zero_ev~0); 304634#L406-1 assume !(0 == ~main_clk_ev~0); 304633#L411-1 assume !(0 == ~main_clk_pos_edge~0); 304631#L416-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 304630#L421-1 assume !(1 == ~main_clk_pos_edge~0); 304629#L426-1 assume !(1 == ~main_clk_pos_edge~0); 304628#L431-1 assume !(1 == ~main_clk_pos_edge~0); 304627#L436-1 assume !(1 == ~main_clk_pos_edge~0); 304626#L441-1 assume !(1 == ~main_clk_pos_edge~0); 304625#L446-1 assume !(1 == ~main_in1_ev~0); 304624#L451-1 assume !(1 == ~main_in2_ev~0); 304623#L456-1 assume !(1 == ~main_sum_ev~0); 304622#L461-1 assume !(1 == ~main_diff_ev~0); 304621#L466-1 assume !(1 == ~main_pres_ev~0); 304620#L471-1 assume !(1 == ~main_dbl_ev~0); 304619#L476-1 assume !(1 == ~main_zero_ev~0); 304618#L481-1 assume !(1 == ~main_clk_ev~0); 304617#L486-1 assume !(1 == ~main_clk_pos_edge~0); 304546#L491-1 assume 1 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 2; 304544#L742-1 [2021-12-14 23:42:32,571 INFO L793 eck$LassoCheckResult]: Loop: 304544#L742-1 assume !false; 304543#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 304539#L229 assume !false; 304538#L147 assume !(0 == ~N_generate_st~0); 304537#L151 assume !(0 == ~S1_addsub_st~0); 304536#L154 assume !(0 == ~S2_presdbl_st~0); 304535#L157 assume !(0 == ~S3_zero_st~0); 304533#L160 assume !(0 == ~D_print_st~0); 304532#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 304531#L509 assume !(1 == ~main_in1_req_up~0); 304529#L509-2 assume !(1 == ~main_in2_req_up~0); 304530#L520-1 assume !(1 == ~main_sum_req_up~0); 304592#L531-1 assume !(1 == ~main_diff_req_up~0); 300234#L542-1 assume !(1 == ~main_pres_req_up~0); 300233#L553-1 assume !(1 == ~main_dbl_req_up~0); 304584#L564-1 assume !(1 == ~main_zero_req_up~0); 304581#L575-1 assume !(1 == ~main_clk_req_up~0); 304579#L586-1 start_simulation_~kernel_st~0#1 := 3; 304578#L605 assume !(0 == ~main_in1_ev~0); 304577#L605-2 assume !(0 == ~main_in2_ev~0); 304576#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 304575#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 304574#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 304573#L625-1 assume !(0 == ~main_dbl_ev~0); 304572#L630-1 assume !(0 == ~main_zero_ev~0); 304571#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 304570#L640-1 assume !(0 == ~main_clk_pos_edge~0); 304568#L645-1 assume 0 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 1; 304567#L650-1 assume !(1 == ~main_clk_pos_edge~0); 304566#L655-1 assume !(1 == ~main_clk_pos_edge~0); 304565#L660-1 assume !(1 == ~main_clk_pos_edge~0); 304564#L665-1 assume !(1 == ~main_clk_pos_edge~0); 304563#L670-1 assume !(1 == ~main_clk_pos_edge~0); 304562#L675-1 assume !(1 == ~main_in1_ev~0); 304561#L680-1 assume !(1 == ~main_in2_ev~0); 304560#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 304559#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 304558#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 304557#L700-1 assume !(1 == ~main_dbl_ev~0); 304556#L705-1 assume !(1 == ~main_zero_ev~0); 304555#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 304554#L715-1 assume !(1 == ~main_clk_pos_edge~0); 304553#L720-1 assume 1 == ~main_clk_neg_edge~0;~main_clk_neg_edge~0 := 2; 304549#L725-1 assume 0 == ~N_generate_st~0; 304544#L742-1 [2021-12-14 23:42:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:32,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1243965239, now seen corresponding path program 1 times [2021-12-14 23:42:32,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:32,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160060216] [2021-12-14 23:42:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:32,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:32,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:32,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160060216] [2021-12-14 23:42:32,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160060216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:32,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:32,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:32,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961594642] [2021-12-14 23:42:32,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:32,588 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1332141836, now seen corresponding path program 1 times [2021-12-14 23:42:32,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:32,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245207516] [2021-12-14 23:42:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:32,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:32,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:32,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245207516] [2021-12-14 23:42:32,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245207516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:32,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:32,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 23:42:32,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999746002] [2021-12-14 23:42:32,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:32,743 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:32,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:32,743 INFO L87 Difference]: Start difference. First operand 44288 states and 68290 transitions. cyclomatic complexity: 24066 Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:32,986 INFO L93 Difference]: Finished difference Result 53275 states and 81140 transitions. [2021-12-14 23:42:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 23:42:32,987 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53275 states and 81140 transitions. [2021-12-14 23:42:33,197 INFO L131 ngComponentsAnalysis]: Automaton has 96 accepting balls. 50818 [2021-12-14 23:42:33,516 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53275 states to 53275 states and 81140 transitions. [2021-12-14 23:42:33,516 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53275 [2021-12-14 23:42:33,565 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53275 [2021-12-14 23:42:33,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53275 states and 81140 transitions. [2021-12-14 23:42:33,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:33,611 INFO L681 BuchiCegarLoop]: Abstraction has 53275 states and 81140 transitions. [2021-12-14 23:42:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53275 states and 81140 transitions. [2021-12-14 23:42:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53275 to 41741. [2021-12-14 23:42:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41741 states, 41741 states have (on average 1.5255504180541912) internal successors, (63678), 41740 states have internal predecessors, (63678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41741 states to 41741 states and 63678 transitions. [2021-12-14 23:42:34,204 INFO L704 BuchiCegarLoop]: Abstraction has 41741 states and 63678 transitions. [2021-12-14 23:42:34,204 INFO L587 BuchiCegarLoop]: Abstraction has 41741 states and 63678 transitions. [2021-12-14 23:42:34,204 INFO L425 BuchiCegarLoop]: ======== Iteration 15============ [2021-12-14 23:42:34,204 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41741 states and 63678 transitions. [2021-12-14 23:42:34,325 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 39570 [2021-12-14 23:42:34,325 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:34,326 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:34,326 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:34,326 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:34,326 INFO L791 eck$LassoCheckResult]: Stem: 394486#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 394442#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 393957#L256 assume !(1 == ~main_in1_req_up~0); 393913#L256-2 assume !(1 == ~main_in2_req_up~0); 393915#L267-1 assume !(1 == ~main_sum_req_up~0); 393944#L278-1 assume !(1 == ~main_diff_req_up~0); 393894#L289-1 assume !(1 == ~main_pres_req_up~0); 393895#L300-1 assume !(1 == ~main_dbl_req_up~0); 394006#L311-1 assume !(1 == ~main_zero_req_up~0); 394412#L322-1 assume !(1 == ~main_clk_req_up~0); 394414#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 398208#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 398207#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 398206#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 398205#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 398204#L371-1 assume !(0 == ~main_in1_ev~0); 398203#L376-1 assume !(0 == ~main_in2_ev~0); 398202#L381-1 assume !(0 == ~main_sum_ev~0); 398198#L386-1 assume !(0 == ~main_diff_ev~0); 396759#L391-1 assume !(0 == ~main_pres_ev~0); 396758#L396-1 assume !(0 == ~main_dbl_ev~0); 396756#L401-1 assume !(0 == ~main_zero_ev~0); 396757#L406-1 assume !(0 == ~main_clk_ev~0); 398188#L411-1 assume !(0 == ~main_clk_pos_edge~0); 396752#L416-1 assume !(0 == ~main_clk_neg_edge~0); 396751#L421-1 assume !(1 == ~main_clk_pos_edge~0); 396750#L426-1 assume !(1 == ~main_clk_pos_edge~0); 396749#L431-1 assume !(1 == ~main_clk_pos_edge~0); 396748#L436-1 assume !(1 == ~main_clk_pos_edge~0); 396747#L441-1 assume !(1 == ~main_clk_pos_edge~0); 396746#L446-1 assume !(1 == ~main_in1_ev~0); 396745#L451-1 assume !(1 == ~main_in2_ev~0); 396744#L456-1 assume !(1 == ~main_sum_ev~0); 396743#L461-1 assume !(1 == ~main_diff_ev~0); 396742#L466-1 assume !(1 == ~main_pres_ev~0); 396741#L471-1 assume !(1 == ~main_dbl_ev~0); 396740#L476-1 assume !(1 == ~main_zero_ev~0); 396738#L481-1 assume !(1 == ~main_clk_ev~0); 396739#L486-1 assume !(1 == ~main_clk_pos_edge~0); 396707#L491-1 assume !(1 == ~main_clk_neg_edge~0); 396702#L742-1 [2021-12-14 23:42:34,327 INFO L793 eck$LassoCheckResult]: Loop: 396702#L742-1 assume !false; 396701#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 396697#L229 assume !false; 396696#L147 assume !(0 == ~N_generate_st~0); 396692#L151 assume !(0 == ~S1_addsub_st~0); 396693#L154 assume !(0 == ~S2_presdbl_st~0); 396694#L157 assume !(0 == ~S3_zero_st~0); 396695#L160 assume !(0 == ~D_print_st~0); 394311#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 394312#L509 assume !(1 == ~main_in1_req_up~0); 394221#L509-2 assume !(1 == ~main_in2_req_up~0); 394222#L520-1 assume !(1 == ~main_sum_req_up~0); 401385#L531-1 assume !(1 == ~main_diff_req_up~0); 400988#L542-1 assume !(1 == ~main_pres_req_up~0); 400984#L553-1 assume !(1 == ~main_dbl_req_up~0); 400981#L564-1 assume !(1 == ~main_zero_req_up~0); 400982#L575-1 assume !(1 == ~main_clk_req_up~0); 401428#L586-1 start_simulation_~kernel_st~0#1 := 3; 403178#L605 assume !(0 == ~main_in1_ev~0); 403177#L605-2 assume !(0 == ~main_in2_ev~0); 403176#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 403175#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 403174#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 403173#L625-1 assume !(0 == ~main_dbl_ev~0); 403172#L630-1 assume !(0 == ~main_zero_ev~0); 403171#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 403170#L640-1 assume !(0 == ~main_clk_pos_edge~0); 403169#L645-1 assume !(0 == ~main_clk_neg_edge~0); 403168#L650-1 assume !(1 == ~main_clk_pos_edge~0); 403167#L655-1 assume !(1 == ~main_clk_pos_edge~0); 403166#L660-1 assume !(1 == ~main_clk_pos_edge~0); 403165#L665-1 assume !(1 == ~main_clk_pos_edge~0); 403164#L670-1 assume !(1 == ~main_clk_pos_edge~0); 403163#L675-1 assume !(1 == ~main_in1_ev~0); 403162#L680-1 assume !(1 == ~main_in2_ev~0); 403161#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 403160#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 403159#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 403158#L700-1 assume !(1 == ~main_dbl_ev~0); 403157#L705-1 assume !(1 == ~main_zero_ev~0); 403156#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 394233#L715-1 assume !(1 == ~main_clk_pos_edge~0); 394155#L720-1 assume !(1 == ~main_clk_neg_edge~0); 394156#L725-1 assume 0 == ~N_generate_st~0; 396702#L742-1 [2021-12-14 23:42:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 3 times [2021-12-14 23:42:34,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:34,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056970818] [2021-12-14 23:42:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:34,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:34,333 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:42:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:34,343 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:42:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1374477620, now seen corresponding path program 1 times [2021-12-14 23:42:34,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360059370] [2021-12-14 23:42:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:34,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:34,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:34,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360059370] [2021-12-14 23:42:34,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360059370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:34,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:34,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 23:42:34,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637889071] [2021-12-14 23:42:34,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:34,357 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:34,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 23:42:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 23:42:34,358 INFO L87 Difference]: Start difference. First operand 41741 states and 63678 transitions. cyclomatic complexity: 22001 Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:34,605 INFO L93 Difference]: Finished difference Result 57643 states and 86947 transitions. [2021-12-14 23:42:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 23:42:34,605 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 57643 states and 86947 transitions. [2021-12-14 23:42:34,848 INFO L131 ngComponentsAnalysis]: Automaton has 72 accepting balls. 53732 [2021-12-14 23:42:35,017 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 57643 states to 57643 states and 86947 transitions. [2021-12-14 23:42:35,020 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57643 [2021-12-14 23:42:35,067 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57643 [2021-12-14 23:42:35,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57643 states and 86947 transitions. [2021-12-14 23:42:35,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:35,119 INFO L681 BuchiCegarLoop]: Abstraction has 57643 states and 86947 transitions. [2021-12-14 23:42:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57643 states and 86947 transitions. [2021-12-14 23:42:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57643 to 57643. [2021-12-14 23:42:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57643 states, 57643 states have (on average 1.5083704873098207) internal successors, (86947), 57642 states have internal predecessors, (86947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57643 states to 57643 states and 86947 transitions. [2021-12-14 23:42:36,024 INFO L704 BuchiCegarLoop]: Abstraction has 57643 states and 86947 transitions. [2021-12-14 23:42:36,024 INFO L587 BuchiCegarLoop]: Abstraction has 57643 states and 86947 transitions. [2021-12-14 23:42:36,024 INFO L425 BuchiCegarLoop]: ======== Iteration 16============ [2021-12-14 23:42:36,024 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57643 states and 86947 transitions. [2021-12-14 23:42:36,185 INFO L131 ngComponentsAnalysis]: Automaton has 72 accepting balls. 53732 [2021-12-14 23:42:36,185 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:36,185 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:36,190 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:36,190 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:36,197 INFO L791 eck$LassoCheckResult]: Stem: 493890#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 493851#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 493348#L256 assume !(1 == ~main_in1_req_up~0); 493303#L256-2 assume !(1 == ~main_in2_req_up~0); 493305#L267-1 assume !(1 == ~main_sum_req_up~0); 493793#L278-1 assume !(1 == ~main_diff_req_up~0); 493448#L289-1 assume !(1 == ~main_pres_req_up~0); 493733#L300-1 assume !(1 == ~main_dbl_req_up~0); 493576#L311-1 assume !(1 == ~main_zero_req_up~0); 493577#L322-1 assume !(1 == ~main_clk_req_up~0); 500679#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 500680#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 500678#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 500676#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 500673#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 500670#L371-1 assume !(0 == ~main_in1_ev~0); 500667#L376-1 assume !(0 == ~main_in2_ev~0); 500664#L381-1 assume !(0 == ~main_sum_ev~0); 500661#L386-1 assume !(0 == ~main_diff_ev~0); 500658#L391-1 assume !(0 == ~main_pres_ev~0); 500655#L396-1 assume !(0 == ~main_dbl_ev~0); 500652#L401-1 assume !(0 == ~main_zero_ev~0); 500649#L406-1 assume !(0 == ~main_clk_ev~0); 500646#L411-1 assume !(0 == ~main_clk_pos_edge~0); 500643#L416-1 assume !(0 == ~main_clk_neg_edge~0); 500640#L421-1 assume !(1 == ~main_clk_pos_edge~0); 500637#L426-1 assume !(1 == ~main_clk_pos_edge~0); 500634#L431-1 assume !(1 == ~main_clk_pos_edge~0); 500631#L436-1 assume !(1 == ~main_clk_pos_edge~0); 500628#L441-1 assume !(1 == ~main_clk_pos_edge~0); 500625#L446-1 assume !(1 == ~main_in1_ev~0); 500622#L451-1 assume !(1 == ~main_in2_ev~0); 500619#L456-1 assume !(1 == ~main_sum_ev~0); 500616#L461-1 assume !(1 == ~main_diff_ev~0); 500613#L466-1 assume !(1 == ~main_pres_ev~0); 500610#L471-1 assume !(1 == ~main_dbl_ev~0); 500607#L476-1 assume !(1 == ~main_zero_ev~0); 500604#L481-1 assume !(1 == ~main_clk_ev~0); 500601#L486-1 assume !(1 == ~main_clk_pos_edge~0); 500589#L491-1 assume !(1 == ~main_clk_neg_edge~0); 500585#L742-1 [2021-12-14 23:42:36,198 INFO L793 eck$LassoCheckResult]: Loop: 500585#L742-1 assume !false; 500581#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 500578#L229 assume !false; 497978#L147 assume !(0 == ~N_generate_st~0); 497977#L151 assume !(0 == ~S1_addsub_st~0); 497976#L154 assume !(0 == ~S2_presdbl_st~0); 497975#L157 assume !(0 == ~S3_zero_st~0); 497973#L160 assume !(0 == ~D_print_st~0); 497972#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 497971#L509 assume !(1 == ~main_in1_req_up~0); 497970#L509-2 assume !(1 == ~main_in2_req_up~0); 494920#L520-1 assume !(1 == ~main_sum_req_up~0); 494912#L531-1 assume !(1 == ~main_diff_req_up~0); 494906#L542-1 assume !(1 == ~main_pres_req_up~0); 494899#L553-1 assume !(1 == ~main_dbl_req_up~0); 494900#L564-1 assume !(1 == ~main_zero_req_up~0); 498604#L575-1 assume !(1 == ~main_clk_req_up~0); 500674#L586-1 start_simulation_~kernel_st~0#1 := 3; 500671#L605 assume !(0 == ~main_in1_ev~0); 500668#L605-2 assume !(0 == ~main_in2_ev~0); 500665#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 500662#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 500659#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 500656#L625-1 assume !(0 == ~main_dbl_ev~0); 500653#L630-1 assume !(0 == ~main_zero_ev~0); 500650#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 500647#L640-1 assume !(0 == ~main_clk_pos_edge~0); 500644#L645-1 assume !(0 == ~main_clk_neg_edge~0); 500641#L650-1 assume !(1 == ~main_clk_pos_edge~0); 500638#L655-1 assume !(1 == ~main_clk_pos_edge~0); 500635#L660-1 assume !(1 == ~main_clk_pos_edge~0); 500632#L665-1 assume !(1 == ~main_clk_pos_edge~0); 500629#L670-1 assume !(1 == ~main_clk_pos_edge~0); 500626#L675-1 assume !(1 == ~main_in1_ev~0); 500623#L680-1 assume !(1 == ~main_in2_ev~0); 500620#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 500617#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 500614#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 500611#L700-1 assume !(1 == ~main_dbl_ev~0); 500608#L705-1 assume !(1 == ~main_zero_ev~0); 500605#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 500602#L715-1 assume !(1 == ~main_clk_pos_edge~0); 500596#L720-1 assume !(1 == ~main_clk_neg_edge~0); 500595#L725-1 assume !(0 == ~N_generate_st~0); 500593#L733 assume 0 == ~S1_addsub_st~0; 500585#L742-1 [2021-12-14 23:42:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 4 times [2021-12-14 23:42:36,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:36,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335885959] [2021-12-14 23:42:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:36,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:36,217 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:42:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:36,245 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:42:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash -340865996, now seen corresponding path program 1 times [2021-12-14 23:42:36,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:36,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38791988] [2021-12-14 23:42:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:36,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:36,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:36,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38791988] [2021-12-14 23:42:36,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38791988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:36,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:36,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 23:42:36,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774720347] [2021-12-14 23:42:36,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:36,524 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:36,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:36,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 23:42:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 23:42:36,525 INFO L87 Difference]: Start difference. First operand 57643 states and 86947 transitions. cyclomatic complexity: 29376 Second operand has 3 states, 2 states have (on average 22.5) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:36,761 INFO L93 Difference]: Finished difference Result 86850 states and 129727 transitions. [2021-12-14 23:42:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 23:42:36,765 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 86850 states and 129727 transitions. [2021-12-14 23:42:37,096 INFO L131 ngComponentsAnalysis]: Automaton has 96 accepting balls. 79456 [2021-12-14 23:42:37,307 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 86850 states to 86850 states and 129727 transitions. [2021-12-14 23:42:37,308 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 86850 [2021-12-14 23:42:37,365 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 86850 [2021-12-14 23:42:37,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86850 states and 129727 transitions. [2021-12-14 23:42:37,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:37,418 INFO L681 BuchiCegarLoop]: Abstraction has 86850 states and 129727 transitions. [2021-12-14 23:42:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86850 states and 129727 transitions. [2021-12-14 23:42:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86850 to 86850. [2021-12-14 23:42:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86850 states, 86850 states have (on average 1.4936902705814623) internal successors, (129727), 86849 states have internal predecessors, (129727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86850 states to 86850 states and 129727 transitions. [2021-12-14 23:42:39,016 INFO L704 BuchiCegarLoop]: Abstraction has 86850 states and 129727 transitions. [2021-12-14 23:42:39,016 INFO L587 BuchiCegarLoop]: Abstraction has 86850 states and 129727 transitions. [2021-12-14 23:42:39,016 INFO L425 BuchiCegarLoop]: ======== Iteration 17============ [2021-12-14 23:42:39,016 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86850 states and 129727 transitions. [2021-12-14 23:42:39,321 INFO L131 ngComponentsAnalysis]: Automaton has 96 accepting balls. 79456 [2021-12-14 23:42:39,321 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:39,321 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:39,322 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:39,322 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:39,322 INFO L791 eck$LassoCheckResult]: Stem: 638405#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 638360#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 637848#L256 assume !(1 == ~main_in1_req_up~0); 637802#L256-2 assume !(1 == ~main_in2_req_up~0); 637804#L267-1 assume !(1 == ~main_sum_req_up~0); 638297#L278-1 assume !(1 == ~main_diff_req_up~0); 637947#L289-1 assume !(1 == ~main_pres_req_up~0); 638228#L300-1 assume !(1 == ~main_dbl_req_up~0); 637897#L311-1 assume !(1 == ~main_zero_req_up~0); 641657#L322-1 assume !(1 == ~main_clk_req_up~0); 641658#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 649339#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 649368#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 649365#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 649362#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 649359#L371-1 assume !(0 == ~main_in1_ev~0); 649356#L376-1 assume !(0 == ~main_in2_ev~0); 649353#L381-1 assume !(0 == ~main_sum_ev~0); 649350#L386-1 assume !(0 == ~main_diff_ev~0); 649347#L391-1 assume !(0 == ~main_pres_ev~0); 649344#L396-1 assume !(0 == ~main_dbl_ev~0); 649341#L401-1 assume !(0 == ~main_zero_ev~0); 649337#L406-1 assume !(0 == ~main_clk_ev~0); 649332#L411-1 assume !(0 == ~main_clk_pos_edge~0); 649328#L416-1 assume !(0 == ~main_clk_neg_edge~0); 649324#L421-1 assume !(1 == ~main_clk_pos_edge~0); 649320#L426-1 assume !(1 == ~main_clk_pos_edge~0); 649316#L431-1 assume !(1 == ~main_clk_pos_edge~0); 649312#L436-1 assume !(1 == ~main_clk_pos_edge~0); 649308#L441-1 assume !(1 == ~main_clk_pos_edge~0); 649304#L446-1 assume !(1 == ~main_in1_ev~0); 649300#L451-1 assume !(1 == ~main_in2_ev~0); 649296#L456-1 assume !(1 == ~main_sum_ev~0); 649292#L461-1 assume !(1 == ~main_diff_ev~0); 649288#L466-1 assume !(1 == ~main_pres_ev~0); 649284#L471-1 assume !(1 == ~main_dbl_ev~0); 649281#L476-1 assume !(1 == ~main_zero_ev~0); 649278#L481-1 assume !(1 == ~main_clk_ev~0); 649276#L486-1 assume !(1 == ~main_clk_pos_edge~0); 649274#L491-1 assume !(1 == ~main_clk_neg_edge~0); 648472#L742-1 [2021-12-14 23:42:39,323 INFO L793 eck$LassoCheckResult]: Loop: 648472#L742-1 assume !false; 648460#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 645391#L229 assume !false; 645392#L147 assume !(0 == ~N_generate_st~0); 640131#L151 assume !(0 == ~S1_addsub_st~0); 640129#L154 assume !(0 == ~S2_presdbl_st~0); 640127#L157 assume !(0 == ~S3_zero_st~0); 640124#L160 assume !(0 == ~D_print_st~0); 640121#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 640119#L509 assume !(1 == ~main_in1_req_up~0); 640116#L509-2 assume !(1 == ~main_in2_req_up~0); 640117#L520-1 assume !(1 == ~main_sum_req_up~0); 641819#L531-1 assume !(1 == ~main_diff_req_up~0); 641815#L542-1 assume !(1 == ~main_pres_req_up~0); 641809#L553-1 assume !(1 == ~main_dbl_req_up~0); 641802#L564-1 assume !(1 == ~main_zero_req_up~0); 641796#L575-1 assume !(1 == ~main_clk_req_up~0); 641797#L586-1 start_simulation_~kernel_st~0#1 := 3; 648516#L605 assume !(0 == ~main_in1_ev~0); 648515#L605-2 assume !(0 == ~main_in2_ev~0); 648514#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 648513#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 648512#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 648511#L625-1 assume !(0 == ~main_dbl_ev~0); 648510#L630-1 assume !(0 == ~main_zero_ev~0); 648509#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 648508#L640-1 assume !(0 == ~main_clk_pos_edge~0); 648507#L645-1 assume !(0 == ~main_clk_neg_edge~0); 648506#L650-1 assume !(1 == ~main_clk_pos_edge~0); 648505#L655-1 assume !(1 == ~main_clk_pos_edge~0); 648504#L660-1 assume !(1 == ~main_clk_pos_edge~0); 648503#L665-1 assume !(1 == ~main_clk_pos_edge~0); 648502#L670-1 assume !(1 == ~main_clk_pos_edge~0); 648501#L675-1 assume !(1 == ~main_in1_ev~0); 648500#L680-1 assume !(1 == ~main_in2_ev~0); 648499#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 648498#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 648497#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 648496#L700-1 assume !(1 == ~main_dbl_ev~0); 648495#L705-1 assume !(1 == ~main_zero_ev~0); 648494#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 648493#L715-1 assume !(1 == ~main_clk_pos_edge~0); 648492#L720-1 assume !(1 == ~main_clk_neg_edge~0); 648491#L725-1 assume !(0 == ~N_generate_st~0); 648490#L733 assume !(0 == ~S1_addsub_st~0); 648489#L736 assume 0 == ~S2_presdbl_st~0; 648472#L742-1 [2021-12-14 23:42:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 5 times [2021-12-14 23:42:39,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:39,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870072309] [2021-12-14 23:42:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:39,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:39,330 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:42:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:39,340 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:42:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1976910535, now seen corresponding path program 1 times [2021-12-14 23:42:39,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:39,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332773896] [2021-12-14 23:42:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:39,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:39,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:39,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332773896] [2021-12-14 23:42:39,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332773896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:39,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:39,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 23:42:39,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138917193] [2021-12-14 23:42:39,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:39,356 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:39,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:39,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 23:42:39,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 23:42:39,357 INFO L87 Difference]: Start difference. First operand 86850 states and 129727 transitions. cyclomatic complexity: 42973 Second operand has 3 states, 2 states have (on average 23.0) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:39,672 INFO L93 Difference]: Finished difference Result 91777 states and 136566 transitions. [2021-12-14 23:42:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 23:42:39,673 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 91777 states and 136566 transitions. [2021-12-14 23:42:40,099 INFO L131 ngComponentsAnalysis]: Automaton has 96 accepting balls. 84178 [2021-12-14 23:42:40,360 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 91777 states to 91777 states and 136566 transitions. [2021-12-14 23:42:40,360 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 91777 [2021-12-14 23:42:40,797 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 91777 [2021-12-14 23:42:40,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91777 states and 136566 transitions. [2021-12-14 23:42:40,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:40,818 INFO L681 BuchiCegarLoop]: Abstraction has 91777 states and 136566 transitions. [2021-12-14 23:42:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91777 states and 136566 transitions. [2021-12-14 23:42:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91777 to 91777. [2021-12-14 23:42:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91777 states, 91777 states have (on average 1.4880198742604356) internal successors, (136566), 91776 states have internal predecessors, (136566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91777 states to 91777 states and 136566 transitions. [2021-12-14 23:42:42,139 INFO L704 BuchiCegarLoop]: Abstraction has 91777 states and 136566 transitions. [2021-12-14 23:42:42,139 INFO L587 BuchiCegarLoop]: Abstraction has 91777 states and 136566 transitions. [2021-12-14 23:42:42,139 INFO L425 BuchiCegarLoop]: ======== Iteration 18============ [2021-12-14 23:42:42,140 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 91777 states and 136566 transitions. [2021-12-14 23:42:42,369 INFO L131 ngComponentsAnalysis]: Automaton has 96 accepting balls. 84178 [2021-12-14 23:42:42,370 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:42,370 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:42,370 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:42,370 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:42,370 INFO L791 eck$LassoCheckResult]: Stem: 817069#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 817009#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 816479#L256 assume !(1 == ~main_in1_req_up~0); 816435#L256-2 assume !(1 == ~main_in2_req_up~0); 816437#L267-1 assume !(1 == ~main_sum_req_up~0); 816466#L278-1 assume !(1 == ~main_diff_req_up~0); 816416#L289-1 assume !(1 == ~main_pres_req_up~0); 816417#L300-1 assume !(1 == ~main_dbl_req_up~0); 821976#L311-1 assume !(1 == ~main_zero_req_up~0); 826853#L322-1 assume !(1 == ~main_clk_req_up~0); 826847#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 826848#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 828550#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 828561#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 828560#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 828559#L371-1 assume !(0 == ~main_in1_ev~0); 828558#L376-1 assume !(0 == ~main_in2_ev~0); 828557#L381-1 assume !(0 == ~main_sum_ev~0); 828556#L386-1 assume !(0 == ~main_diff_ev~0); 828555#L391-1 assume !(0 == ~main_pres_ev~0); 828554#L396-1 assume !(0 == ~main_dbl_ev~0); 828553#L401-1 assume !(0 == ~main_zero_ev~0); 828552#L406-1 assume !(0 == ~main_clk_ev~0); 828551#L411-1 assume !(0 == ~main_clk_pos_edge~0); 828536#L416-1 assume !(0 == ~main_clk_neg_edge~0); 828533#L421-1 assume !(1 == ~main_clk_pos_edge~0); 828530#L426-1 assume !(1 == ~main_clk_pos_edge~0); 828527#L431-1 assume !(1 == ~main_clk_pos_edge~0); 828524#L436-1 assume !(1 == ~main_clk_pos_edge~0); 828521#L441-1 assume !(1 == ~main_clk_pos_edge~0); 828518#L446-1 assume !(1 == ~main_in1_ev~0); 828515#L451-1 assume !(1 == ~main_in2_ev~0); 828512#L456-1 assume !(1 == ~main_sum_ev~0); 828509#L461-1 assume !(1 == ~main_diff_ev~0); 828506#L466-1 assume !(1 == ~main_pres_ev~0); 828503#L471-1 assume !(1 == ~main_dbl_ev~0); 828500#L476-1 assume !(1 == ~main_zero_ev~0); 828497#L481-1 assume !(1 == ~main_clk_ev~0); 828494#L486-1 assume !(1 == ~main_clk_pos_edge~0); 828445#L491-1 assume !(1 == ~main_clk_neg_edge~0); 828341#L742-1 [2021-12-14 23:42:42,371 INFO L793 eck$LassoCheckResult]: Loop: 828341#L742-1 assume !false; 828342#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 828330#L229 assume !false; 828331#L147 assume !(0 == ~N_generate_st~0); 821912#L151 assume !(0 == ~S1_addsub_st~0); 821909#L154 assume !(0 == ~S2_presdbl_st~0); 821908#L157 assume !(0 == ~S3_zero_st~0); 821905#L160 assume !(0 == ~D_print_st~0); 821903#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 821900#L509 assume !(1 == ~main_in1_req_up~0); 821896#L509-2 assume !(1 == ~main_in2_req_up~0); 821897#L520-1 assume !(1 == ~main_sum_req_up~0); 828325#L531-1 assume !(1 == ~main_diff_req_up~0); 828323#L542-1 assume !(1 == ~main_pres_req_up~0); 828319#L553-1 assume !(1 == ~main_dbl_req_up~0); 828315#L564-1 assume !(1 == ~main_zero_req_up~0); 828312#L575-1 assume !(1 == ~main_clk_req_up~0); 828313#L586-1 start_simulation_~kernel_st~0#1 := 3; 828565#L605 assume !(0 == ~main_in1_ev~0); 828564#L605-2 assume !(0 == ~main_in2_ev~0); 828563#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 828562#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 828537#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 828534#L625-1 assume !(0 == ~main_dbl_ev~0); 828531#L630-1 assume !(0 == ~main_zero_ev~0); 828528#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 828525#L640-1 assume !(0 == ~main_clk_pos_edge~0); 828522#L645-1 assume !(0 == ~main_clk_neg_edge~0); 828519#L650-1 assume !(1 == ~main_clk_pos_edge~0); 828516#L655-1 assume !(1 == ~main_clk_pos_edge~0); 828513#L660-1 assume !(1 == ~main_clk_pos_edge~0); 828510#L665-1 assume !(1 == ~main_clk_pos_edge~0); 828507#L670-1 assume !(1 == ~main_clk_pos_edge~0); 828504#L675-1 assume !(1 == ~main_in1_ev~0); 828501#L680-1 assume !(1 == ~main_in2_ev~0); 828498#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 828495#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 828448#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 828444#L700-1 assume !(1 == ~main_dbl_ev~0); 828441#L705-1 assume !(1 == ~main_zero_ev~0); 828437#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 828436#L715-1 assume !(1 == ~main_clk_pos_edge~0); 828403#L720-1 assume !(1 == ~main_clk_neg_edge~0); 828400#L725-1 assume !(0 == ~N_generate_st~0); 828397#L733 assume !(0 == ~S1_addsub_st~0); 828394#L736 assume !(0 == ~S2_presdbl_st~0); 828387#L739 assume 0 == ~S3_zero_st~0; 828341#L742-1 [2021-12-14 23:42:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 6 times [2021-12-14 23:42:42,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:42,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515209527] [2021-12-14 23:42:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:42,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:42,377 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:42:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:42,387 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:42:42,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1154683687, now seen corresponding path program 1 times [2021-12-14 23:42:42,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:42,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295402694] [2021-12-14 23:42:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:42,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:42,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:42,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295402694] [2021-12-14 23:42:42,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295402694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:42,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:42,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 23:42:42,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633244999] [2021-12-14 23:42:42,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:42,400 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:42,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:42,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 23:42:42,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 23:42:42,401 INFO L87 Difference]: Start difference. First operand 91777 states and 136566 transitions. cyclomatic complexity: 44885 Second operand has 3 states, 2 states have (on average 23.5) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:42,786 INFO L93 Difference]: Finished difference Result 147978 states and 218783 transitions. [2021-12-14 23:42:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 23:42:42,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 147978 states and 218783 transitions. [2021-12-14 23:42:43,826 INFO L131 ngComponentsAnalysis]: Automaton has 144 accepting balls. 133258 [2021-12-14 23:42:44,224 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 147978 states to 147978 states and 218783 transitions. [2021-12-14 23:42:44,224 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 147978 [2021-12-14 23:42:44,319 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 147978 [2021-12-14 23:42:44,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 147978 states and 218783 transitions. [2021-12-14 23:42:44,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:44,397 INFO L681 BuchiCegarLoop]: Abstraction has 147978 states and 218783 transitions. [2021-12-14 23:42:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147978 states and 218783 transitions. [2021-12-14 23:42:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147978 to 147978. [2021-12-14 23:42:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147978 states, 147978 states have (on average 1.4784832880563328) internal successors, (218783), 147977 states have internal predecessors, (218783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147978 states to 147978 states and 218783 transitions. [2021-12-14 23:42:46,177 INFO L704 BuchiCegarLoop]: Abstraction has 147978 states and 218783 transitions. [2021-12-14 23:42:46,177 INFO L587 BuchiCegarLoop]: Abstraction has 147978 states and 218783 transitions. [2021-12-14 23:42:46,177 INFO L425 BuchiCegarLoop]: ======== Iteration 19============ [2021-12-14 23:42:46,177 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 147978 states and 218783 transitions. [2021-12-14 23:42:47,006 INFO L131 ngComponentsAnalysis]: Automaton has 144 accepting balls. 133258 [2021-12-14 23:42:47,007 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:47,007 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:47,007 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:47,007 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:47,008 INFO L791 eck$LassoCheckResult]: Stem: 1056893#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 1056824#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 1056239#L256 assume !(1 == ~main_in1_req_up~0); 1056195#L256-2 assume !(1 == ~main_in2_req_up~0); 1056197#L267-1 assume !(1 == ~main_sum_req_up~0); 1056226#L278-1 assume !(1 == ~main_diff_req_up~0); 1056177#L289-1 assume !(1 == ~main_pres_req_up~0); 1056178#L300-1 assume !(1 == ~main_dbl_req_up~0); 1058333#L311-1 assume !(1 == ~main_zero_req_up~0); 1058334#L322-1 assume !(1 == ~main_clk_req_up~0); 1061675#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 1061676#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 1061680#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 1061800#L361-1 assume !(1 == ~S3_zero_i~0);~S3_zero_st~0 := 2; 1061801#L366-1 assume !(1 == ~D_print_i~0);~D_print_st~0 := 2; 1061946#L371-1 assume !(0 == ~main_in1_ev~0); 1061944#L376-1 assume !(0 == ~main_in2_ev~0); 1061942#L381-1 assume !(0 == ~main_sum_ev~0); 1061940#L386-1 assume !(0 == ~main_diff_ev~0); 1061938#L391-1 assume !(0 == ~main_pres_ev~0); 1061936#L396-1 assume !(0 == ~main_dbl_ev~0); 1061934#L401-1 assume !(0 == ~main_zero_ev~0); 1061932#L406-1 assume !(0 == ~main_clk_ev~0); 1061930#L411-1 assume !(0 == ~main_clk_pos_edge~0); 1061928#L416-1 assume !(0 == ~main_clk_neg_edge~0); 1061926#L421-1 assume !(1 == ~main_clk_pos_edge~0); 1061924#L426-1 assume !(1 == ~main_clk_pos_edge~0); 1061922#L431-1 assume !(1 == ~main_clk_pos_edge~0); 1061920#L436-1 assume !(1 == ~main_clk_pos_edge~0); 1061918#L441-1 assume !(1 == ~main_clk_pos_edge~0); 1061916#L446-1 assume !(1 == ~main_in1_ev~0); 1061914#L451-1 assume !(1 == ~main_in2_ev~0); 1061912#L456-1 assume !(1 == ~main_sum_ev~0); 1061910#L461-1 assume !(1 == ~main_diff_ev~0); 1061908#L466-1 assume !(1 == ~main_pres_ev~0); 1061906#L471-1 assume !(1 == ~main_dbl_ev~0); 1061904#L476-1 assume !(1 == ~main_zero_ev~0); 1061902#L481-1 assume !(1 == ~main_clk_ev~0); 1061900#L486-1 assume !(1 == ~main_clk_pos_edge~0); 1061897#L491-1 assume !(1 == ~main_clk_neg_edge~0); 1061896#L742-1 [2021-12-14 23:42:47,008 INFO L793 eck$LassoCheckResult]: Loop: 1061896#L742-1 assume !false; 1061476#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 1061466#L229 assume !false; 1060898#L147 assume !(0 == ~N_generate_st~0); 1060726#L151 assume !(0 == ~S1_addsub_st~0); 1060719#L154 assume !(0 == ~S2_presdbl_st~0); 1056188#L157 assume !(0 == ~S3_zero_st~0); 1056189#L160 assume !(0 == ~D_print_st~0); 1056637#L245 assume { :end_inline_eval } true;start_simulation_~kernel_st~0#1 := 2; 1056638#L509 assume !(1 == ~main_in1_req_up~0); 1056665#L509-2 assume !(1 == ~main_in2_req_up~0); 1057380#L520-1 assume !(1 == ~main_sum_req_up~0); 1058129#L531-1 assume !(1 == ~main_diff_req_up~0); 1058122#L542-1 assume !(1 == ~main_pres_req_up~0); 1058121#L553-1 assume !(1 == ~main_dbl_req_up~0); 1058097#L564-1 assume !(1 == ~main_zero_req_up~0); 1058098#L575-1 assume !(1 == ~main_clk_req_up~0); 1061953#L586-1 start_simulation_~kernel_st~0#1 := 3; 1061952#L605 assume !(0 == ~main_in1_ev~0); 1061951#L605-2 assume !(0 == ~main_in2_ev~0); 1061950#L610-1 assume 0 == ~main_sum_ev~0;~main_sum_ev~0 := 1; 1061949#L615-1 assume 0 == ~main_diff_ev~0;~main_diff_ev~0 := 1; 1061948#L620-1 assume 0 == ~main_pres_ev~0;~main_pres_ev~0 := 1; 1061947#L625-1 assume !(0 == ~main_dbl_ev~0); 1061945#L630-1 assume !(0 == ~main_zero_ev~0); 1061943#L635-1 assume 0 == ~main_clk_ev~0;~main_clk_ev~0 := 1; 1061941#L640-1 assume !(0 == ~main_clk_pos_edge~0); 1061939#L645-1 assume !(0 == ~main_clk_neg_edge~0); 1061937#L650-1 assume !(1 == ~main_clk_pos_edge~0); 1061935#L655-1 assume !(1 == ~main_clk_pos_edge~0); 1061933#L660-1 assume !(1 == ~main_clk_pos_edge~0); 1061931#L665-1 assume !(1 == ~main_clk_pos_edge~0); 1061929#L670-1 assume !(1 == ~main_clk_pos_edge~0); 1061927#L675-1 assume !(1 == ~main_in1_ev~0); 1061925#L680-1 assume !(1 == ~main_in2_ev~0); 1061923#L685-1 assume 1 == ~main_sum_ev~0;~main_sum_ev~0 := 2; 1061921#L690-1 assume 1 == ~main_diff_ev~0;~main_diff_ev~0 := 2; 1061919#L695-1 assume 1 == ~main_pres_ev~0;~main_pres_ev~0 := 2; 1061917#L700-1 assume !(1 == ~main_dbl_ev~0); 1061915#L705-1 assume !(1 == ~main_zero_ev~0); 1061913#L710-1 assume 1 == ~main_clk_ev~0;~main_clk_ev~0 := 2; 1061911#L715-1 assume !(1 == ~main_clk_pos_edge~0); 1061909#L720-1 assume !(1 == ~main_clk_neg_edge~0); 1061907#L725-1 assume !(0 == ~N_generate_st~0); 1061905#L733 assume !(0 == ~S1_addsub_st~0); 1061903#L736 assume !(0 == ~S2_presdbl_st~0); 1061901#L739 assume !(0 == ~S3_zero_st~0); 1061898#L742 assume 0 == ~D_print_st~0; 1061896#L742-1 [2021-12-14 23:42:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash 222896887, now seen corresponding path program 7 times [2021-12-14 23:42:47,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:47,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068365286] [2021-12-14 23:42:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:47,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:47,013 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:42:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:47,021 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:42:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1435455170, now seen corresponding path program 1 times [2021-12-14 23:42:47,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:47,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365797679] [2021-12-14 23:42:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:47,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:47,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:47,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365797679] [2021-12-14 23:42:47,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365797679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:47,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:47,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 23:42:47,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869830724] [2021-12-14 23:42:47,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:47,034 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-14 23:42:47,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:47,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 23:42:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 23:42:47,035 INFO L87 Difference]: Start difference. First operand 147978 states and 218783 transitions. cyclomatic complexity: 70949 Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:47,766 INFO L93 Difference]: Finished difference Result 253411 states and 370695 transitions. [2021-12-14 23:42:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 23:42:47,766 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 253411 states and 370695 transitions. [2021-12-14 23:42:49,448 INFO L131 ngComponentsAnalysis]: Automaton has 224 accepting balls. 219346 [2021-12-14 23:42:50,133 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 253411 states to 253411 states and 370695 transitions. [2021-12-14 23:42:50,133 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 253411 [2021-12-14 23:42:50,293 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 253411 [2021-12-14 23:42:50,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253411 states and 370695 transitions. [2021-12-14 23:42:50,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:50,851 INFO L681 BuchiCegarLoop]: Abstraction has 253411 states and 370695 transitions. [2021-12-14 23:42:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253411 states and 370695 transitions. [2021-12-14 23:42:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253411 to 253411. [2021-12-14 23:42:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253411 states, 253411 states have (on average 1.4628212666379912) internal successors, (370695), 253410 states have internal predecessors, (370695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253411 states to 253411 states and 370695 transitions. [2021-12-14 23:42:54,149 INFO L704 BuchiCegarLoop]: Abstraction has 253411 states and 370695 transitions. [2021-12-14 23:42:54,150 INFO L587 BuchiCegarLoop]: Abstraction has 253411 states and 370695 transitions. [2021-12-14 23:42:54,150 INFO L425 BuchiCegarLoop]: ======== Iteration 20============ [2021-12-14 23:42:54,150 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 253411 states and 370695 transitions. [2021-12-14 23:42:54,838 INFO L131 ngComponentsAnalysis]: Automaton has 224 accepting balls. 219346 [2021-12-14 23:42:54,839 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:42:54,839 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:42:54,842 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:54,842 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:42:54,843 INFO L791 eck$LassoCheckResult]: Stem: 1458266#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 1458195#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 1457634#L256 assume !(1 == ~main_in1_req_up~0); 1457590#L256-2 assume !(1 == ~main_in2_req_up~0); 1457592#L267-1 assume !(1 == ~main_sum_req_up~0); 1457621#L278-1 assume !(1 == ~main_diff_req_up~0); 1457572#L289-1 assume !(1 == ~main_pres_req_up~0); 1457573#L300-1 assume !(1 == ~main_dbl_req_up~0); 1462589#L311-1 assume !(1 == ~main_zero_req_up~0); 1467522#L322-1 assume !(1 == ~main_clk_req_up~0); 1485585#L333-1 assume 1 == ~N_generate_i~0;~N_generate_st~0 := 0; 1486049#L351-1 assume 1 == ~S1_addsub_i~0;~S1_addsub_st~0 := 0; 1486050#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 1486074#L361-1 assume 1 == ~S3_zero_i~0;~S3_zero_st~0 := 0; 1486075#L366-1 assume 1 == ~D_print_i~0;~D_print_st~0 := 0; 1486094#L371-1 assume !(0 == ~main_in1_ev~0); 1486093#L376-1 assume !(0 == ~main_in2_ev~0); 1486092#L381-1 assume !(0 == ~main_sum_ev~0); 1486091#L386-1 assume !(0 == ~main_diff_ev~0); 1486090#L391-1 assume !(0 == ~main_pres_ev~0); 1486089#L396-1 assume !(0 == ~main_dbl_ev~0); 1486088#L401-1 assume !(0 == ~main_zero_ev~0); 1486087#L406-1 assume !(0 == ~main_clk_ev~0); 1486086#L411-1 assume !(0 == ~main_clk_pos_edge~0); 1486085#L416-1 assume !(0 == ~main_clk_neg_edge~0); 1486077#L421-1 assume !(1 == ~main_clk_pos_edge~0); 1486076#L426-1 assume !(1 == ~main_clk_pos_edge~0); 1486055#L431-1 assume !(1 == ~main_clk_pos_edge~0); 1486054#L436-1 assume !(1 == ~main_clk_pos_edge~0); 1486053#L441-1 assume !(1 == ~main_clk_pos_edge~0); 1486051#L446-1 assume !(1 == ~main_in1_ev~0); 1486048#L451-1 assume !(1 == ~main_in2_ev~0); 1485923#L456-1 assume !(1 == ~main_sum_ev~0); 1485920#L461-1 assume !(1 == ~main_diff_ev~0); 1485918#L466-1 assume !(1 == ~main_pres_ev~0); 1485916#L471-1 assume !(1 == ~main_dbl_ev~0); 1485914#L476-1 assume !(1 == ~main_zero_ev~0); 1485912#L481-1 assume !(1 == ~main_clk_ev~0); 1485910#L486-1 assume !(1 == ~main_clk_pos_edge~0); 1485908#L491-1 assume !(1 == ~main_clk_neg_edge~0); 1485905#L742-1 assume !false; 1485776#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 1485705#L229 [2021-12-14 23:42:54,843 INFO L793 eck$LassoCheckResult]: Loop: 1485705#L229 assume !false; 1485696#L147 assume 0 == ~N_generate_st~0; 1485682#L160-1 assume 0 == ~N_generate_st~0;eval_~tmp~0#1 := eval_#t~nondet4#1;havoc eval_#t~nondet4#1; 1485670#L173 assume !(0 != eval_~tmp~0#1); 1485671#L169 assume 0 == ~S1_addsub_st~0;eval_~tmp___0~0#1 := eval_#t~nondet5#1;havoc eval_#t~nondet5#1; 1485849#L188 assume !(0 != eval_~tmp___0~0#1); 1485840#L184 assume !(0 == ~S2_presdbl_st~0); 1485836#L199 assume 0 == ~S3_zero_st~0;eval_~tmp___2~0#1 := eval_#t~nondet7#1;havoc eval_#t~nondet7#1; 1485831#L218 assume !(0 != eval_~tmp___2~0#1); 1485828#L214 assume 0 == ~D_print_st~0;eval_~tmp___3~0#1 := eval_#t~nondet8#1;havoc eval_#t~nondet8#1; 1485774#L233 assume !(0 != eval_~tmp___3~0#1); 1485705#L229 [2021-12-14 23:42:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1897430713, now seen corresponding path program 1 times [2021-12-14 23:42:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:54,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239760465] [2021-12-14 23:42:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:54,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:42:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:42:54,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:42:54,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239760465] [2021-12-14 23:42:54,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239760465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:42:54,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:42:54,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:42:54,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85068776] [2021-12-14 23:42:54,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:42:54,864 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:42:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:42:54,864 INFO L85 PathProgramCache]: Analyzing trace with hash 263530038, now seen corresponding path program 1 times [2021-12-14 23:42:54,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:42:54,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882881211] [2021-12-14 23:42:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:42:54,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:42:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:54,867 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:42:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:42:54,869 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:42:54,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:42:54,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:42:54,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:42:54,930 INFO L87 Difference]: Start difference. First operand 253411 states and 370695 transitions. cyclomatic complexity: 117508 Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:42:55,974 INFO L93 Difference]: Finished difference Result 152871 states and 223090 transitions. [2021-12-14 23:42:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 23:42:55,975 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 152871 states and 223090 transitions. [2021-12-14 23:42:56,587 INFO L131 ngComponentsAnalysis]: Automaton has 96 accepting balls. 131250 [2021-12-14 23:42:56,997 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 152871 states to 152871 states and 223090 transitions. [2021-12-14 23:42:56,997 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 152871 [2021-12-14 23:42:57,103 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 152871 [2021-12-14 23:42:57,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 152871 states and 223090 transitions. [2021-12-14 23:42:57,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:42:57,191 INFO L681 BuchiCegarLoop]: Abstraction has 152871 states and 223090 transitions. [2021-12-14 23:42:57,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152871 states and 223090 transitions. [2021-12-14 23:42:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152871 to 152871. [2021-12-14 23:42:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152871 states, 152871 states have (on average 1.4593349948649514) internal successors, (223090), 152870 states have internal predecessors, (223090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:42:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152871 states to 152871 states and 223090 transitions. [2021-12-14 23:42:59,594 INFO L704 BuchiCegarLoop]: Abstraction has 152871 states and 223090 transitions. [2021-12-14 23:42:59,594 INFO L587 BuchiCegarLoop]: Abstraction has 152871 states and 223090 transitions. [2021-12-14 23:42:59,594 INFO L425 BuchiCegarLoop]: ======== Iteration 21============ [2021-12-14 23:42:59,594 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 152871 states and 223090 transitions. [2021-12-14 23:43:00,099 INFO L131 ngComponentsAnalysis]: Automaton has 96 accepting balls. 131250 [2021-12-14 23:43:00,100 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:43:00,100 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:43:00,101 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:43:00,101 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:43:00,101 INFO L791 eck$LassoCheckResult]: Stem: 1864555#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 1864493#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 1863927#L256 assume !(1 == ~main_in1_req_up~0); 1863882#L256-2 assume !(1 == ~main_in2_req_up~0); 1863884#L267-1 assume !(1 == ~main_sum_req_up~0); 1864416#L278-1 assume !(1 == ~main_diff_req_up~0); 1864026#L289-1 assume !(1 == ~main_pres_req_up~0); 1864343#L300-1 assume !(1 == ~main_dbl_req_up~0); 1863977#L311-1 assume !(1 == ~main_zero_req_up~0); 1864166#L322-1 assume !(1 == ~main_clk_req_up~0); 1904030#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 1904027#L351-1 assume 1 == ~S1_addsub_i~0;~S1_addsub_st~0 := 0; 1904025#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 1904022#L361-1 assume 1 == ~S3_zero_i~0;~S3_zero_st~0 := 0; 1904023#L366-1 assume 1 == ~D_print_i~0;~D_print_st~0 := 0; 1904039#L371-1 assume !(0 == ~main_in1_ev~0); 1904038#L376-1 assume !(0 == ~main_in2_ev~0); 1904037#L381-1 assume !(0 == ~main_sum_ev~0); 1904035#L386-1 assume !(0 == ~main_diff_ev~0); 1904034#L391-1 assume !(0 == ~main_pres_ev~0); 1904031#L396-1 assume !(0 == ~main_dbl_ev~0); 1904029#L401-1 assume !(0 == ~main_zero_ev~0); 1904026#L406-1 assume !(0 == ~main_clk_ev~0); 1904024#L411-1 assume !(0 == ~main_clk_pos_edge~0); 1904021#L416-1 assume !(0 == ~main_clk_neg_edge~0); 1904018#L421-1 assume !(1 == ~main_clk_pos_edge~0); 1904016#L426-1 assume !(1 == ~main_clk_pos_edge~0); 1904014#L431-1 assume !(1 == ~main_clk_pos_edge~0); 1904012#L436-1 assume !(1 == ~main_clk_pos_edge~0); 1904010#L441-1 assume !(1 == ~main_clk_pos_edge~0); 1904008#L446-1 assume !(1 == ~main_in1_ev~0); 1904006#L451-1 assume !(1 == ~main_in2_ev~0); 1904004#L456-1 assume !(1 == ~main_sum_ev~0); 1904002#L461-1 assume !(1 == ~main_diff_ev~0); 1904000#L466-1 assume !(1 == ~main_pres_ev~0); 1903998#L471-1 assume !(1 == ~main_dbl_ev~0); 1903996#L476-1 assume !(1 == ~main_zero_ev~0); 1903994#L481-1 assume !(1 == ~main_clk_ev~0); 1903992#L486-1 assume !(1 == ~main_clk_pos_edge~0); 1903990#L491-1 assume !(1 == ~main_clk_neg_edge~0); 1903988#L742-1 assume !false; 1903986#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 1903982#L229 [2021-12-14 23:43:00,101 INFO L793 eck$LassoCheckResult]: Loop: 1903982#L229 assume !false; 1903980#L147 assume !(0 == ~N_generate_st~0); 1903977#L151 assume 0 == ~S1_addsub_st~0; 1903975#L160-1 assume !(0 == ~N_generate_st~0); 1903972#L169 assume 0 == ~S1_addsub_st~0;eval_~tmp___0~0#1 := eval_#t~nondet5#1;havoc eval_#t~nondet5#1; 1903969#L188 assume !(0 != eval_~tmp___0~0#1); 1903967#L184 assume !(0 == ~S2_presdbl_st~0); 1903965#L199 assume 0 == ~S3_zero_st~0;eval_~tmp___2~0#1 := eval_#t~nondet7#1;havoc eval_#t~nondet7#1; 1903963#L218 assume !(0 != eval_~tmp___2~0#1); 1903964#L214 assume 0 == ~D_print_st~0;eval_~tmp___3~0#1 := eval_#t~nondet8#1;havoc eval_#t~nondet8#1; 1903984#L233 assume !(0 != eval_~tmp___3~0#1); 1903982#L229 [2021-12-14 23:43:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:43:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2122776969, now seen corresponding path program 1 times [2021-12-14 23:43:00,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:43:00,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523715422] [2021-12-14 23:43:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:43:00,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:43:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:43:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:43:00,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:43:00,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523715422] [2021-12-14 23:43:00,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523715422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:43:00,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:43:00,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:43:00,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751339920] [2021-12-14 23:43:00,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:43:00,161 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:43:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:43:00,161 INFO L85 PathProgramCache]: Analyzing trace with hash 105804796, now seen corresponding path program 1 times [2021-12-14 23:43:00,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:43:00,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500336648] [2021-12-14 23:43:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:43:00,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:43:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:43:00,164 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:43:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:43:00,166 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:43:00,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:43:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:43:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:43:00,209 INFO L87 Difference]: Start difference. First operand 152871 states and 223090 transitions. cyclomatic complexity: 70315 Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:43:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:43:00,540 INFO L93 Difference]: Finished difference Result 109199 states and 158994 transitions. [2021-12-14 23:43:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 23:43:00,541 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109199 states and 158994 transitions. [2021-12-14 23:43:00,990 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 94626 [2021-12-14 23:43:01,249 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109199 states to 109199 states and 158994 transitions. [2021-12-14 23:43:01,249 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 109199 [2021-12-14 23:43:01,313 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 109199 [2021-12-14 23:43:01,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109199 states and 158994 transitions. [2021-12-14 23:43:01,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:43:01,876 INFO L681 BuchiCegarLoop]: Abstraction has 109199 states and 158994 transitions. [2021-12-14 23:43:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109199 states and 158994 transitions. [2021-12-14 23:43:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109199 to 109199. [2021-12-14 23:43:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109199 states, 109199 states have (on average 1.4560023443438126) internal successors, (158994), 109198 states have internal predecessors, (158994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:43:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109199 states to 109199 states and 158994 transitions. [2021-12-14 23:43:03,010 INFO L704 BuchiCegarLoop]: Abstraction has 109199 states and 158994 transitions. [2021-12-14 23:43:03,010 INFO L587 BuchiCegarLoop]: Abstraction has 109199 states and 158994 transitions. [2021-12-14 23:43:03,010 INFO L425 BuchiCegarLoop]: ======== Iteration 22============ [2021-12-14 23:43:03,010 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 109199 states and 158994 transitions. [2021-12-14 23:43:03,768 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 94626 [2021-12-14 23:43:03,769 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-14 23:43:03,769 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-14 23:43:03,770 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:43:03,770 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 23:43:03,770 INFO L791 eck$LassoCheckResult]: Stem: 2126666#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(17, 2);call #Ultimate.allocInit(12, 3);~main_in1_val~0 := 0;~main_in1_val_t~0 := 0;~main_in1_ev~0 := 0;~main_in1_req_up~0 := 0;~main_in2_val~0 := 0;~main_in2_val_t~0 := 0;~main_in2_ev~0 := 0;~main_in2_req_up~0 := 0;~main_diff_val~0 := 0;~main_diff_val_t~0 := 0;~main_diff_ev~0 := 0;~main_diff_req_up~0 := 0;~main_sum_val~0 := 0;~main_sum_val_t~0 := 0;~main_sum_ev~0 := 0;~main_sum_req_up~0 := 0;~main_pres_val~0 := 0;~main_pres_val_t~0 := 0;~main_pres_ev~0 := 0;~main_pres_req_up~0 := 0;~main_dbl_val~0 := 0;~main_dbl_val_t~0 := 0;~main_dbl_ev~0 := 0;~main_dbl_req_up~0 := 0;~main_zero_val~0 := 0;~main_zero_val_t~0 := 0;~main_zero_ev~0 := 0;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_val_t~0 := 0;~main_clk_ev~0 := 0;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 0;~main_clk_neg_edge~0 := 0;~N_generate_st~0 := 0;~N_generate_i~0 := 0;~S1_addsub_st~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_st~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_st~0 := 0;~S3_zero_i~0 := 0;~D_z~0 := 0;~D_print_st~0 := 0;~D_print_i~0 := 0; 2126597#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_~count~0#1, main_~__retres2~0#1;havoc main_~count~0#1;havoc main_~__retres2~0#1;~main_in1_ev~0 := 2;~main_in1_req_up~0 := 0;~main_in2_ev~0 := 2;~main_in2_req_up~0 := 0;~main_diff_ev~0 := 2;~main_diff_req_up~0 := 0;~main_sum_ev~0 := 2;~main_sum_req_up~0 := 0;~main_pres_ev~0 := 2;~main_pres_req_up~0 := 0;~main_dbl_ev~0 := 2;~main_dbl_req_up~0 := 0;~main_zero_ev~0 := 2;~main_zero_req_up~0 := 0;~main_clk_val~0 := 0;~main_clk_ev~0 := 2;~main_clk_req_up~0 := 0;~main_clk_pos_edge~0 := 2;~main_clk_neg_edge~0 := 2;main_~count~0#1 := 0;~N_generate_i~0 := 0;~S1_addsub_i~0 := 0;~S2_presdbl_i~0 := 0;~S3_zero_i~0 := 0;~D_print_i~0 := 0;assume { :begin_inline_start_simulation } true;havoc start_simulation_~kernel_st~0#1;havoc start_simulation_~kernel_st~0#1;start_simulation_~kernel_st~0#1 := 0; 2126007#L256 assume !(1 == ~main_in1_req_up~0); 2125962#L256-2 assume !(1 == ~main_in2_req_up~0); 2125964#L267-1 assume !(1 == ~main_sum_req_up~0); 2125993#L278-1 assume !(1 == ~main_diff_req_up~0); 2125944#L289-1 assume !(1 == ~main_pres_req_up~0); 2125945#L300-1 assume !(1 == ~main_dbl_req_up~0); 2128392#L311-1 assume !(1 == ~main_zero_req_up~0); 2128383#L322-1 assume !(1 == ~main_clk_req_up~0); 2128384#L333-1 assume !(1 == ~N_generate_i~0);~N_generate_st~0 := 2; 2129999#L351-1 assume !(1 == ~S1_addsub_i~0);~S1_addsub_st~0 := 2; 2129998#L356-1 assume !(1 == ~S2_presdbl_i~0);~S2_presdbl_st~0 := 2; 2129996#L361-1 assume 1 == ~S3_zero_i~0;~S3_zero_st~0 := 0; 2129994#L366-1 assume 1 == ~D_print_i~0;~D_print_st~0 := 0; 2129995#L371-1 assume !(0 == ~main_in1_ev~0); 2130045#L376-1 assume !(0 == ~main_in2_ev~0); 2130044#L381-1 assume !(0 == ~main_sum_ev~0); 2130043#L386-1 assume !(0 == ~main_diff_ev~0); 2130042#L391-1 assume !(0 == ~main_pres_ev~0); 2130041#L396-1 assume !(0 == ~main_dbl_ev~0); 2130040#L401-1 assume !(0 == ~main_zero_ev~0); 2130039#L406-1 assume !(0 == ~main_clk_ev~0); 2130038#L411-1 assume !(0 == ~main_clk_pos_edge~0); 2130036#L416-1 assume !(0 == ~main_clk_neg_edge~0); 2130032#L421-1 assume !(1 == ~main_clk_pos_edge~0); 2130028#L426-1 assume !(1 == ~main_clk_pos_edge~0); 2130024#L431-1 assume !(1 == ~main_clk_pos_edge~0); 2130020#L436-1 assume !(1 == ~main_clk_pos_edge~0); 2130016#L441-1 assume !(1 == ~main_clk_pos_edge~0); 2130012#L446-1 assume !(1 == ~main_in1_ev~0); 2130008#L451-1 assume !(1 == ~main_in2_ev~0); 2130004#L456-1 assume !(1 == ~main_sum_ev~0); 2130000#L461-1 assume !(1 == ~main_diff_ev~0); 2129980#L466-1 assume !(1 == ~main_pres_ev~0); 2129976#L471-1 assume !(1 == ~main_dbl_ev~0); 2129972#L476-1 assume !(1 == ~main_zero_ev~0); 2129968#L481-1 assume !(1 == ~main_clk_ev~0); 2129915#L486-1 assume !(1 == ~main_clk_pos_edge~0); 2129885#L491-1 assume !(1 == ~main_clk_neg_edge~0); 2129876#L742-1 assume !false; 2129872#L503 start_simulation_~kernel_st~0#1 := 1;assume { :begin_inline_eval } true;havoc eval_#t~nondet4#1, eval_#t~nondet5#1, eval_#t~nondet6#1, eval_#t~nondet7#1, eval_#t~nondet8#1, eval_~tmp~0#1, eval_~tmp___0~0#1, eval_~tmp___1~0#1, eval_~tmp___2~0#1, eval_~tmp___3~0#1;havoc eval_~tmp~0#1;havoc eval_~tmp___0~0#1;havoc eval_~tmp___1~0#1;havoc eval_~tmp___2~0#1;havoc eval_~tmp___3~0#1; 2129615#L229 [2021-12-14 23:43:03,770 INFO L793 eck$LassoCheckResult]: Loop: 2129615#L229 assume !false; 2129865#L147 assume !(0 == ~N_generate_st~0); 2129863#L151 assume !(0 == ~S1_addsub_st~0); 2129861#L154 assume !(0 == ~S2_presdbl_st~0); 2129859#L157 assume 0 == ~S3_zero_st~0; 2129856#L160-1 assume !(0 == ~N_generate_st~0); 2129853#L169 assume !(0 == ~S1_addsub_st~0); 2129810#L184 assume !(0 == ~S2_presdbl_st~0); 2129811#L199 assume 0 == ~S3_zero_st~0;eval_~tmp___2~0#1 := eval_#t~nondet7#1;havoc eval_#t~nondet7#1; 2129812#L218 assume !(0 != eval_~tmp___2~0#1); 2129804#L214 assume 0 == ~D_print_st~0;eval_~tmp___3~0#1 := eval_#t~nondet8#1;havoc eval_#t~nondet8#1; 2129613#L233 assume !(0 != eval_~tmp___3~0#1); 2129615#L229 [2021-12-14 23:43:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:43:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1421177095, now seen corresponding path program 1 times [2021-12-14 23:43:03,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:43:03,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312507257] [2021-12-14 23:43:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:43:03,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:43:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 23:43:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 23:43:03,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 23:43:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312507257] [2021-12-14 23:43:03,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312507257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 23:43:03,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 23:43:03,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 23:43:03,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653345073] [2021-12-14 23:43:03,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 23:43:03,806 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-14 23:43:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 23:43:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1118247229, now seen corresponding path program 1 times [2021-12-14 23:43:03,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 23:43:03,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513439824] [2021-12-14 23:43:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 23:43:03,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 23:43:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:43:03,810 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 23:43:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 23:43:03,811 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 23:43:03,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 23:43:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 23:43:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 23:43:03,849 INFO L87 Difference]: Start difference. First operand 109199 states and 158994 transitions. cyclomatic complexity: 49859 Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 23:43:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 23:43:04,070 INFO L93 Difference]: Finished difference Result 81667 states and 118838 transitions. [2021-12-14 23:43:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 23:43:04,071 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81667 states and 118838 transitions. [2021-12-14 23:43:04,364 INFO L131 ngComponentsAnalysis]: Automaton has 48 accepting balls. 71796 [2021-12-14 23:43:04,571 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81667 states to 81667 states and 118838 transitions. [2021-12-14 23:43:04,571 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81667 [2021-12-14 23:43:04,630 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 81667 [2021-12-14 23:43:04,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81667 states and 118838 transitions. [2021-12-14 23:43:04,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 23:43:04,683 INFO L681 BuchiCegarLoop]: Abstraction has 81667 states and 118838 transitions. [2021-12-14 23:43:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81667 states and 118838 transitions.