./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/locks/test_locks_12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 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/locks/test_locks_12.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 12c3feea735c5360de013afbcf9aaa3880d39f75cbb7661493cccf003151044d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-19 17:58:12,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 17:58:12,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 17:58:12,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 17:58:12,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 17:58:12,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 17:58:12,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 17:58:12,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 17:58:12,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 17:58:12,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 17:58:12,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 17:58:12,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 17:58:12,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 17:58:12,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 17:58:12,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 17:58:12,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 17:58:12,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 17:58:12,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 17:58:12,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 17:58:12,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 17:58:12,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 17:58:12,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 17:58:12,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 17:58:12,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 17:58:12,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 17:58:12,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 17:58:12,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 17:58:12,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 17:58:12,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 17:58:12,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 17:58:12,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 17:58:12,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 17:58:12,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 17:58:12,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 17:58:12,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 17:58:12,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 17:58:12,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 17:58:12,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 17:58:12,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 17:58:12,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 17:58:12,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 17:58:12,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-19 17:58:13,011 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 17:58:13,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 17:58:13,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 17:58:13,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 17:58:13,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 17:58:13,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 17:58:13,013 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 17:58:13,013 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-19 17:58:13,014 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-19 17:58:13,014 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-19 17:58:13,014 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-19 17:58:13,015 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-19 17:58:13,015 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-19 17:58:13,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 17:58:13,015 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-19 17:58:13,015 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 17:58:13,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 17:58:13,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-19 17:58:13,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 17:58:13,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-19 17:58:13,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-19 17:58:13,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-19 17:58:13,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-19 17:58:13,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-19 17:58:13,017 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-19 17:58:13,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 17:58:13,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-19 17:58:13,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 17:58:13,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 17:58:13,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 17:58:13,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-19 17:58:13,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 17:58:13,019 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-19 17:58:13,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12c3feea735c5360de013afbcf9aaa3880d39f75cbb7661493cccf003151044d [2021-12-19 17:58:13,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 17:58:13,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 17:58:13,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 17:58:13,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 17:58:13,231 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 17:58:13,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_12.c [2021-12-19 17:58:13,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66948c3f2/8220e88255984efa8d73899e145ff25d/FLAG8336930ad [2021-12-19 17:58:13,617 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 17:58:13,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c [2021-12-19 17:58:13,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66948c3f2/8220e88255984efa8d73899e145ff25d/FLAG8336930ad [2021-12-19 17:58:14,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66948c3f2/8220e88255984efa8d73899e145ff25d [2021-12-19 17:58:14,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 17:58:14,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 17:58:14,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 17:58:14,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 17:58:14,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 17:58:14,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e11a848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14, skipping insertion in model container [2021-12-19 17:58:14,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 17:58:14,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 17:58:14,249 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/locks/test_locks_12.c[4591,4604] [2021-12-19 17:58:14,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 17:58:14,256 INFO L203 MainTranslator]: Completed pre-run [2021-12-19 17:58:14,290 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/locks/test_locks_12.c[4591,4604] [2021-12-19 17:58:14,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 17:58:14,304 INFO L208 MainTranslator]: Completed translation [2021-12-19 17:58:14,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14 WrapperNode [2021-12-19 17:58:14,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 17:58:14,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-19 17:58:14,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-19 17:58:14,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-19 17:58:14,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,337 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 147 [2021-12-19 17:58:14,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-19 17:58:14,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-19 17:58:14,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-19 17:58:14,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-19 17:58:14,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-19 17:58:14,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-19 17:58:14,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-19 17:58:14,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-19 17:58:14,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (1/1) ... [2021-12-19 17:58:14,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 17:58:14,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 17:58:14,394 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) [2021-12-19 17:58:14,403 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 [2021-12-19 17:58:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-19 17:58:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-19 17:58:14,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-19 17:58:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-19 17:58:14,462 INFO L236 CfgBuilder]: Building ICFG [2021-12-19 17:58:14,463 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-19 17:58:14,576 INFO L277 CfgBuilder]: Performing block encoding [2021-12-19 17:58:14,581 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-19 17:58:14,581 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-19 17:58:14,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:58:14 BoogieIcfgContainer [2021-12-19 17:58:14,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-19 17:58:14,583 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-19 17:58:14,583 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-19 17:58:14,585 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-19 17:58:14,586 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 17:58:14,586 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.12 05:58:14" (1/3) ... [2021-12-19 17:58:14,587 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4469fce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.12 05:58:14, skipping insertion in model container [2021-12-19 17:58:14,587 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 17:58:14,587 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:58:14" (2/3) ... [2021-12-19 17:58:14,587 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4469fce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.12 05:58:14, skipping insertion in model container [2021-12-19 17:58:14,588 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 17:58:14,588 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:58:14" (3/3) ... [2021-12-19 17:58:14,589 INFO L388 chiAutomizerObserver]: Analyzing ICFG test_locks_12.c [2021-12-19 17:58:14,615 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-19 17:58:14,615 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-19 17:58:14,615 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-19 17:58:14,615 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-19 17:58:14,616 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-19 17:58:14,616 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-19 17:58:14,616 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-19 17:58:14,616 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-19 17:58:14,625 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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) [2021-12-19 17:58:14,639 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 38 [2021-12-19 17:58:14,639 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:14,639 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:14,643 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:14,643 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] [2021-12-19 17:58:14,644 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-19 17:58:14,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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) [2021-12-19 17:58:14,648 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 38 [2021-12-19 17:58:14,649 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:14,649 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:14,649 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:14,649 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] [2021-12-19 17:58:14,656 INFO L791 eck$LassoCheckResult]: Stem: 25#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(16, 2);call #Ultimate.allocInit(12, 3); 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 34#L183-1true [2021-12-19 17:58:14,657 INFO L793 eck$LassoCheckResult]: Loop: 34#L183-1true assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 18#L49true assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 35#L78true assume 0 != main_~p1~0#1;main_~lk1~0#1 := 1; 15#L78-2true assume 0 != main_~p2~0#1;main_~lk2~0#1 := 1; 13#L82-1true assume !(0 != main_~p3~0#1); 9#L86-1true assume 0 != main_~p4~0#1;main_~lk4~0#1 := 1; 36#L90-1true assume 0 != main_~p5~0#1;main_~lk5~0#1 := 1; 12#L94-1true assume 0 != main_~p6~0#1;main_~lk6~0#1 := 1; 20#L98-1true assume 0 != main_~p7~0#1;main_~lk7~0#1 := 1; 33#L102-1true assume 0 != main_~p8~0#1;main_~lk8~0#1 := 1; 16#L106-1true assume 0 != main_~p9~0#1;main_~lk9~0#1 := 1; 26#L110-1true assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 42#L114-1true assume !(0 != main_~p11~0#1); 31#L118-1true assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 14#L122-1true assume !(0 != main_~p1~0#1); 28#L128-1true assume !(0 != main_~p2~0#1); 5#L133-1true assume !(0 != main_~p3~0#1); 4#L138-1true assume !(0 != main_~p4~0#1); 27#L143-1true assume !(0 != main_~p5~0#1); 6#L148-1true assume !(0 != main_~p6~0#1); 22#L153-1true assume !(0 != main_~p7~0#1); 39#L158-1true assume !(0 != main_~p8~0#1); 24#L163-1true assume !(0 != main_~p9~0#1); 41#L168-1true assume !(0 != main_~p10~0#1); 19#L173-1true assume !(0 != main_~p11~0#1); 8#L178-1true assume !(0 != main_~p12~0#1); 34#L183-1true [2021-12-19 17:58:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:14,661 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-19 17:58:14,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:14,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572227197] [2021-12-19 17:58:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:14,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:14,730 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:14,765 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash -819199544, now seen corresponding path program 1 times [2021-12-19 17:58:14,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676856453] [2021-12-19 17:58:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:14,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:14,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:14,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676856453] [2021-12-19 17:58:14,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676856453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:14,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:14,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:14,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246109760] [2021-12-19 17:58:14,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:14,884 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:14,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:14,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:14,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:14,917 INFO L87 Difference]: Start difference. First operand has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:14,958 INFO L93 Difference]: Finished difference Result 87 states and 154 transitions. [2021-12-19 17:58:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:14,964 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 87 states and 154 transitions. [2021-12-19 17:58:14,972 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 75 [2021-12-19 17:58:14,978 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 87 states to 77 states and 123 transitions. [2021-12-19 17:58:14,979 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-12-19 17:58:14,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-12-19 17:58:14,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 123 transitions. [2021-12-19 17:58:14,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:14,980 INFO L681 BuchiCegarLoop]: Abstraction has 77 states and 123 transitions. [2021-12-19 17:58:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states and 123 transitions. [2021-12-19 17:58:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-19 17:58:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 77 states have (on average 1.5974025974025974) internal successors, (123), 76 states have internal predecessors, (123), 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) [2021-12-19 17:58:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 123 transitions. [2021-12-19 17:58:15,005 INFO L704 BuchiCegarLoop]: Abstraction has 77 states and 123 transitions. [2021-12-19 17:58:15,005 INFO L587 BuchiCegarLoop]: Abstraction has 77 states and 123 transitions. [2021-12-19 17:58:15,005 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-19 17:58:15,005 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 77 states and 123 transitions. [2021-12-19 17:58:15,010 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 75 [2021-12-19 17:58:15,010 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:15,010 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:15,012 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:15,012 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] [2021-12-19 17:58:15,012 INFO L791 eck$LassoCheckResult]: Stem: 176#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(16, 2);call #Ultimate.allocInit(12, 3); 152#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 151#L183-1 [2021-12-19 17:58:15,013 INFO L793 eck$LassoCheckResult]: Loop: 151#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 167#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 168#L78 assume !(0 != main_~p1~0#1); 196#L78-2 assume 0 != main_~p2~0#1;main_~lk2~0#1 := 1; 195#L82-1 assume !(0 != main_~p3~0#1); 153#L86-1 assume 0 != main_~p4~0#1;main_~lk4~0#1 := 1; 154#L90-1 assume 0 != main_~p5~0#1;main_~lk5~0#1 := 1; 194#L94-1 assume 0 != main_~p6~0#1;main_~lk6~0#1 := 1; 193#L98-1 assume 0 != main_~p7~0#1;main_~lk7~0#1 := 1; 192#L102-1 assume 0 != main_~p8~0#1;main_~lk8~0#1 := 1; 191#L106-1 assume 0 != main_~p9~0#1;main_~lk9~0#1 := 1; 190#L110-1 assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 187#L114-1 assume !(0 != main_~p11~0#1); 188#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 189#L122-1 assume !(0 != main_~p1~0#1); 179#L128-1 assume !(0 != main_~p2~0#1); 144#L133-1 assume !(0 != main_~p3~0#1); 141#L138-1 assume !(0 != main_~p4~0#1); 142#L143-1 assume !(0 != main_~p5~0#1); 146#L148-1 assume !(0 != main_~p6~0#1); 148#L153-1 assume !(0 != main_~p7~0#1); 156#L158-1 assume !(0 != main_~p8~0#1); 205#L163-1 assume !(0 != main_~p9~0#1); 185#L168-1 assume !(0 != main_~p10~0#1); 169#L173-1 assume !(0 != main_~p11~0#1); 149#L178-1 assume !(0 != main_~p12~0#1); 151#L183-1 [2021-12-19 17:58:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,014 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-12-19 17:58:15,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659712704] [2021-12-19 17:58:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,035 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,042 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash -953213050, now seen corresponding path program 1 times [2021-12-19 17:58:15,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966371921] [2021-12-19 17:58:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:15,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:15,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966371921] [2021-12-19 17:58:15,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966371921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:15,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:15,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:15,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152198204] [2021-12-19 17:58:15,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:15,096 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:15,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:15,096 INFO L87 Difference]: Start difference. First operand 77 states and 123 transitions. cyclomatic complexity: 48 Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:15,126 INFO L93 Difference]: Finished difference Result 150 states and 238 transitions. [2021-12-19 17:58:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:15,128 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 150 states and 238 transitions. [2021-12-19 17:58:15,131 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 148 [2021-12-19 17:58:15,133 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 150 states to 150 states and 238 transitions. [2021-12-19 17:58:15,134 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 150 [2021-12-19 17:58:15,135 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 150 [2021-12-19 17:58:15,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 238 transitions. [2021-12-19 17:58:15,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:15,136 INFO L681 BuchiCegarLoop]: Abstraction has 150 states and 238 transitions. [2021-12-19 17:58:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states and 238 transitions. [2021-12-19 17:58:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-19 17:58:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 150 states have (on average 1.5866666666666667) internal successors, (238), 149 states have internal predecessors, (238), 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) [2021-12-19 17:58:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 238 transitions. [2021-12-19 17:58:15,150 INFO L704 BuchiCegarLoop]: Abstraction has 150 states and 238 transitions. [2021-12-19 17:58:15,150 INFO L587 BuchiCegarLoop]: Abstraction has 150 states and 238 transitions. [2021-12-19 17:58:15,150 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-19 17:58:15,150 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 150 states and 238 transitions. [2021-12-19 17:58:15,151 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 148 [2021-12-19 17:58:15,154 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:15,154 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:15,155 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:15,155 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] [2021-12-19 17:58:15,155 INFO L791 eck$LassoCheckResult]: Stem: 414#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(16, 2);call #Ultimate.allocInit(12, 3); 386#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 387#L183-1 [2021-12-19 17:58:15,155 INFO L793 eck$LassoCheckResult]: Loop: 387#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 405#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 406#L78 assume !(0 != main_~p1~0#1); 483#L78-2 assume !(0 != main_~p2~0#1); 396#L82-1 assume !(0 != main_~p3~0#1); 390#L86-1 assume 0 != main_~p4~0#1;main_~lk4~0#1 := 1; 391#L90-1 assume 0 != main_~p5~0#1;main_~lk5~0#1 := 1; 475#L94-1 assume 0 != main_~p6~0#1;main_~lk6~0#1 := 1; 471#L98-1 assume 0 != main_~p7~0#1;main_~lk7~0#1 := 1; 469#L102-1 assume 0 != main_~p8~0#1;main_~lk8~0#1 := 1; 466#L106-1 assume 0 != main_~p9~0#1;main_~lk9~0#1 := 1; 464#L110-1 assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 427#L114-1 assume !(0 != main_~p11~0#1); 419#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 420#L122-1 assume !(0 != main_~p1~0#1); 458#L128-1 assume !(0 != main_~p2~0#1); 377#L133-1 assume !(0 != main_~p3~0#1); 379#L138-1 assume !(0 != main_~p4~0#1); 448#L143-1 assume !(0 != main_~p5~0#1); 446#L148-1 assume !(0 != main_~p6~0#1); 444#L153-1 assume !(0 != main_~p7~0#1); 424#L158-1 assume !(0 != main_~p8~0#1); 409#L163-1 assume !(0 != main_~p9~0#1); 411#L168-1 assume !(0 != main_~p10~0#1); 439#L173-1 assume !(0 != main_~p11~0#1); 434#L178-1 assume !(0 != main_~p12~0#1); 387#L183-1 [2021-12-19 17:58:15,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,156 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2021-12-19 17:58:15,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501023456] [2021-12-19 17:58:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,162 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,166 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1536315912, now seen corresponding path program 1 times [2021-12-19 17:58:15,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779702322] [2021-12-19 17:58:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:15,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:15,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779702322] [2021-12-19 17:58:15,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779702322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:15,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:15,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:15,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755763442] [2021-12-19 17:58:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:15,198 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:15,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:15,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:15,199 INFO L87 Difference]: Start difference. First operand 150 states and 238 transitions. cyclomatic complexity: 92 Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:15,216 INFO L93 Difference]: Finished difference Result 294 states and 462 transitions. [2021-12-19 17:58:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:15,217 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 294 states and 462 transitions. [2021-12-19 17:58:15,218 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 292 [2021-12-19 17:58:15,222 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 294 states to 294 states and 462 transitions. [2021-12-19 17:58:15,222 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 294 [2021-12-19 17:58:15,223 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 294 [2021-12-19 17:58:15,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 294 states and 462 transitions. [2021-12-19 17:58:15,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:15,227 INFO L681 BuchiCegarLoop]: Abstraction has 294 states and 462 transitions. [2021-12-19 17:58:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states and 462 transitions. [2021-12-19 17:58:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2021-12-19 17:58:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 294 states have (on average 1.5714285714285714) internal successors, (462), 293 states have internal predecessors, (462), 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) [2021-12-19 17:58:15,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 462 transitions. [2021-12-19 17:58:15,237 INFO L704 BuchiCegarLoop]: Abstraction has 294 states and 462 transitions. [2021-12-19 17:58:15,237 INFO L587 BuchiCegarLoop]: Abstraction has 294 states and 462 transitions. [2021-12-19 17:58:15,237 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-19 17:58:15,237 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 294 states and 462 transitions. [2021-12-19 17:58:15,239 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 292 [2021-12-19 17:58:15,239 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:15,239 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:15,239 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:15,239 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] [2021-12-19 17:58:15,240 INFO L791 eck$LassoCheckResult]: Stem: 860#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(16, 2);call #Ultimate.allocInit(12, 3); 831#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 832#L183-1 [2021-12-19 17:58:15,240 INFO L793 eck$LassoCheckResult]: Loop: 832#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 936#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 930#L78 assume !(0 != main_~p1~0#1); 931#L78-2 assume !(0 != main_~p2~0#1); 1011#L82-1 assume !(0 != main_~p3~0#1); 1007#L86-1 assume !(0 != main_~p4~0#1); 1004#L90-1 assume 0 != main_~p5~0#1;main_~lk5~0#1 := 1; 1001#L94-1 assume 0 != main_~p6~0#1;main_~lk6~0#1 := 1; 998#L98-1 assume 0 != main_~p7~0#1;main_~lk7~0#1 := 1; 995#L102-1 assume 0 != main_~p8~0#1;main_~lk8~0#1 := 1; 992#L106-1 assume 0 != main_~p9~0#1;main_~lk9~0#1 := 1; 989#L110-1 assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 986#L114-1 assume !(0 != main_~p11~0#1); 981#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 932#L122-1 assume !(0 != main_~p1~0#1); 933#L128-1 assume !(0 != main_~p2~0#1); 977#L133-1 assume !(0 != main_~p3~0#1); 972#L138-1 assume !(0 != main_~p4~0#1); 969#L143-1 assume !(0 != main_~p5~0#1); 965#L148-1 assume !(0 != main_~p6~0#1); 961#L153-1 assume !(0 != main_~p7~0#1); 957#L158-1 assume !(0 != main_~p8~0#1); 953#L163-1 assume !(0 != main_~p9~0#1); 949#L168-1 assume !(0 != main_~p10~0#1); 944#L173-1 assume !(0 != main_~p11~0#1); 941#L178-1 assume !(0 != main_~p12~0#1); 832#L183-1 [2021-12-19 17:58:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2021-12-19 17:58:15,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558088550] [2021-12-19 17:58:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,248 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,256 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1959017738, now seen corresponding path program 1 times [2021-12-19 17:58:15,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369303192] [2021-12-19 17:58:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:15,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:15,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369303192] [2021-12-19 17:58:15,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369303192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:15,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:15,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:15,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684571754] [2021-12-19 17:58:15,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:15,285 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:15,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:15,286 INFO L87 Difference]: Start difference. First operand 294 states and 462 transitions. cyclomatic complexity: 176 Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:15,296 INFO L93 Difference]: Finished difference Result 578 states and 898 transitions. [2021-12-19 17:58:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:15,297 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 578 states and 898 transitions. [2021-12-19 17:58:15,301 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 576 [2021-12-19 17:58:15,305 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 578 states to 578 states and 898 transitions. [2021-12-19 17:58:15,306 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 578 [2021-12-19 17:58:15,307 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 578 [2021-12-19 17:58:15,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 578 states and 898 transitions. [2021-12-19 17:58:15,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:15,310 INFO L681 BuchiCegarLoop]: Abstraction has 578 states and 898 transitions. [2021-12-19 17:58:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states and 898 transitions. [2021-12-19 17:58:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-12-19 17:58:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 578 states have (on average 1.5536332179930796) internal successors, (898), 577 states have internal predecessors, (898), 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) [2021-12-19 17:58:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 898 transitions. [2021-12-19 17:58:15,323 INFO L704 BuchiCegarLoop]: Abstraction has 578 states and 898 transitions. [2021-12-19 17:58:15,323 INFO L587 BuchiCegarLoop]: Abstraction has 578 states and 898 transitions. [2021-12-19 17:58:15,323 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-19 17:58:15,323 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 578 states and 898 transitions. [2021-12-19 17:58:15,325 INFO L131 ngComponentsAnalysis]: Automaton has 16 accepting balls. 576 [2021-12-19 17:58:15,325 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:15,325 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:15,326 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:15,326 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] [2021-12-19 17:58:15,326 INFO L791 eck$LassoCheckResult]: Stem: 1741#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(16, 2);call #Ultimate.allocInit(12, 3); 1709#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 1710#L183-1 [2021-12-19 17:58:15,326 INFO L793 eck$LassoCheckResult]: Loop: 1710#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 1939#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 1938#L78 assume !(0 != main_~p1~0#1); 1937#L78-2 assume !(0 != main_~p2~0#1); 1928#L82-1 assume !(0 != main_~p3~0#1); 1929#L86-1 assume !(0 != main_~p4~0#1); 1910#L90-1 assume !(0 != main_~p5~0#1); 1912#L94-1 assume 0 != main_~p6~0#1;main_~lk6~0#1 := 1; 1894#L98-1 assume 0 != main_~p7~0#1;main_~lk7~0#1 := 1; 1895#L102-1 assume 0 != main_~p8~0#1;main_~lk8~0#1 := 1; 1878#L106-1 assume 0 != main_~p9~0#1;main_~lk9~0#1 := 1; 1879#L110-1 assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 1862#L114-1 assume !(0 != main_~p11~0#1); 1863#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 1846#L122-1 assume !(0 != main_~p1~0#1); 1847#L128-1 assume !(0 != main_~p2~0#1); 1967#L133-1 assume !(0 != main_~p3~0#1); 1964#L138-1 assume !(0 != main_~p4~0#1); 1961#L143-1 assume !(0 != main_~p5~0#1); 1960#L148-1 assume !(0 != main_~p6~0#1); 1958#L153-1 assume !(0 != main_~p7~0#1); 1956#L158-1 assume !(0 != main_~p8~0#1); 1953#L163-1 assume !(0 != main_~p9~0#1); 1951#L168-1 assume !(0 != main_~p10~0#1); 1945#L173-1 assume !(0 != main_~p11~0#1); 1942#L178-1 assume !(0 != main_~p12~0#1); 1710#L183-1 [2021-12-19 17:58:15,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,327 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 5 times [2021-12-19 17:58:15,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617197679] [2021-12-19 17:58:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,331 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,335 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1141369288, now seen corresponding path program 1 times [2021-12-19 17:58:15,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453850635] [2021-12-19 17:58:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:15,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:15,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453850635] [2021-12-19 17:58:15,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453850635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:15,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:15,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:15,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912005017] [2021-12-19 17:58:15,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:15,355 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:15,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:15,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:15,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:15,355 INFO L87 Difference]: Start difference. First operand 578 states and 898 transitions. cyclomatic complexity: 336 Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:15,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:15,367 INFO L93 Difference]: Finished difference Result 1138 states and 1746 transitions. [2021-12-19 17:58:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:15,367 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1138 states and 1746 transitions. [2021-12-19 17:58:15,373 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 1136 [2021-12-19 17:58:15,377 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1138 states to 1138 states and 1746 transitions. [2021-12-19 17:58:15,378 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1138 [2021-12-19 17:58:15,395 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1138 [2021-12-19 17:58:15,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1138 states and 1746 transitions. [2021-12-19 17:58:15,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:15,397 INFO L681 BuchiCegarLoop]: Abstraction has 1138 states and 1746 transitions. [2021-12-19 17:58:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states and 1746 transitions. [2021-12-19 17:58:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2021-12-19 17:58:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1138 states have (on average 1.5342706502636203) internal successors, (1746), 1137 states have internal predecessors, (1746), 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) [2021-12-19 17:58:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1746 transitions. [2021-12-19 17:58:15,411 INFO L704 BuchiCegarLoop]: Abstraction has 1138 states and 1746 transitions. [2021-12-19 17:58:15,411 INFO L587 BuchiCegarLoop]: Abstraction has 1138 states and 1746 transitions. [2021-12-19 17:58:15,411 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-19 17:58:15,412 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1138 states and 1746 transitions. [2021-12-19 17:58:15,415 INFO L131 ngComponentsAnalysis]: Automaton has 32 accepting balls. 1136 [2021-12-19 17:58:15,415 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:15,416 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:15,416 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:15,416 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] [2021-12-19 17:58:15,416 INFO L791 eck$LassoCheckResult]: Stem: 3463#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(16, 2);call #Ultimate.allocInit(12, 3); 3431#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 3432#L183-1 [2021-12-19 17:58:15,417 INFO L793 eck$LassoCheckResult]: Loop: 3432#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 3657#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 3654#L78 assume !(0 != main_~p1~0#1); 3651#L78-2 assume !(0 != main_~p2~0#1); 3644#L82-1 assume !(0 != main_~p3~0#1); 3645#L86-1 assume !(0 != main_~p4~0#1); 3627#L90-1 assume !(0 != main_~p5~0#1); 3629#L94-1 assume !(0 != main_~p6~0#1); 3613#L98-1 assume 0 != main_~p7~0#1;main_~lk7~0#1 := 1; 3614#L102-1 assume 0 != main_~p8~0#1;main_~lk8~0#1 := 1; 3599#L106-1 assume 0 != main_~p9~0#1;main_~lk9~0#1 := 1; 3600#L110-1 assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 3585#L114-1 assume !(0 != main_~p11~0#1); 3586#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 3567#L122-1 assume !(0 != main_~p1~0#1); 3568#L128-1 assume !(0 != main_~p2~0#1); 3691#L133-1 assume !(0 != main_~p3~0#1); 3688#L138-1 assume !(0 != main_~p4~0#1); 3686#L143-1 assume !(0 != main_~p5~0#1); 3684#L148-1 assume !(0 != main_~p6~0#1); 3681#L153-1 assume !(0 != main_~p7~0#1); 3677#L158-1 assume !(0 != main_~p8~0#1); 3673#L163-1 assume !(0 != main_~p9~0#1); 3669#L168-1 assume !(0 != main_~p10~0#1); 3664#L173-1 assume !(0 != main_~p11~0#1); 3661#L178-1 assume !(0 != main_~p12~0#1); 3432#L183-1 [2021-12-19 17:58:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 6 times [2021-12-19 17:58:15,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712993608] [2021-12-19 17:58:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,421 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,424 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash -547574454, now seen corresponding path program 1 times [2021-12-19 17:58:15,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029244395] [2021-12-19 17:58:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:15,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:15,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029244395] [2021-12-19 17:58:15,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029244395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:15,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:15,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:15,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973140504] [2021-12-19 17:58:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:15,441 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:15,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:15,442 INFO L87 Difference]: Start difference. First operand 1138 states and 1746 transitions. cyclomatic complexity: 640 Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:15,456 INFO L93 Difference]: Finished difference Result 2242 states and 3394 transitions. [2021-12-19 17:58:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:15,457 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 2242 states and 3394 transitions. [2021-12-19 17:58:15,468 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 2240 [2021-12-19 17:58:15,476 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 2242 states to 2242 states and 3394 transitions. [2021-12-19 17:58:15,476 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 2242 [2021-12-19 17:58:15,477 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 2242 [2021-12-19 17:58:15,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2242 states and 3394 transitions. [2021-12-19 17:58:15,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:15,479 INFO L681 BuchiCegarLoop]: Abstraction has 2242 states and 3394 transitions. [2021-12-19 17:58:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states and 3394 transitions. [2021-12-19 17:58:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2242. [2021-12-19 17:58:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2242 states have (on average 1.5138269402319358) internal successors, (3394), 2241 states have internal predecessors, (3394), 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) [2021-12-19 17:58:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3394 transitions. [2021-12-19 17:58:15,505 INFO L704 BuchiCegarLoop]: Abstraction has 2242 states and 3394 transitions. [2021-12-19 17:58:15,505 INFO L587 BuchiCegarLoop]: Abstraction has 2242 states and 3394 transitions. [2021-12-19 17:58:15,506 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-12-19 17:58:15,506 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2242 states and 3394 transitions. [2021-12-19 17:58:15,513 INFO L131 ngComponentsAnalysis]: Automaton has 64 accepting balls. 2240 [2021-12-19 17:58:15,513 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:15,513 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:15,514 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:15,514 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] [2021-12-19 17:58:15,514 INFO L791 eck$LassoCheckResult]: Stem: 6848#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(16, 2);call #Ultimate.allocInit(12, 3); 6817#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 6818#L183-1 [2021-12-19 17:58:15,514 INFO L793 eck$LassoCheckResult]: Loop: 6818#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 7040#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 7037#L78 assume !(0 != main_~p1~0#1); 7034#L78-2 assume !(0 != main_~p2~0#1); 7026#L82-1 assume !(0 != main_~p3~0#1); 7027#L86-1 assume !(0 != main_~p4~0#1); 7010#L90-1 assume !(0 != main_~p5~0#1); 7011#L94-1 assume !(0 != main_~p6~0#1); 6994#L98-1 assume !(0 != main_~p7~0#1); 6996#L102-1 assume 0 != main_~p8~0#1;main_~lk8~0#1 := 1; 6982#L106-1 assume 0 != main_~p9~0#1;main_~lk9~0#1 := 1; 6983#L110-1 assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 6970#L114-1 assume !(0 != main_~p11~0#1); 6971#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 6953#L122-1 assume !(0 != main_~p1~0#1); 6954#L128-1 assume !(0 != main_~p2~0#1); 7073#L133-1 assume !(0 != main_~p3~0#1); 7070#L138-1 assume !(0 != main_~p4~0#1); 7068#L143-1 assume !(0 != main_~p5~0#1); 7066#L148-1 assume !(0 != main_~p6~0#1); 7064#L153-1 assume !(0 != main_~p7~0#1); 7061#L158-1 assume !(0 != main_~p8~0#1); 7057#L163-1 assume !(0 != main_~p9~0#1); 7053#L168-1 assume !(0 != main_~p10~0#1); 7048#L173-1 assume !(0 != main_~p11~0#1); 7045#L178-1 assume !(0 != main_~p12~0#1); 6818#L183-1 [2021-12-19 17:58:15,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,515 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 7 times [2021-12-19 17:58:15,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271322338] [2021-12-19 17:58:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,518 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,521 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1753248136, now seen corresponding path program 1 times [2021-12-19 17:58:15,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241997850] [2021-12-19 17:58:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:15,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:15,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241997850] [2021-12-19 17:58:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241997850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:15,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:15,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:15,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679871483] [2021-12-19 17:58:15,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:15,538 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:15,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:15,538 INFO L87 Difference]: Start difference. First operand 2242 states and 3394 transitions. cyclomatic complexity: 1216 Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:15,559 INFO L93 Difference]: Finished difference Result 4418 states and 6594 transitions. [2021-12-19 17:58:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:15,560 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 4418 states and 6594 transitions. [2021-12-19 17:58:15,583 INFO L131 ngComponentsAnalysis]: Automaton has 128 accepting balls. 4416 [2021-12-19 17:58:15,619 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 4418 states to 4418 states and 6594 transitions. [2021-12-19 17:58:15,619 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4418 [2021-12-19 17:58:15,621 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4418 [2021-12-19 17:58:15,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4418 states and 6594 transitions. [2021-12-19 17:58:15,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:15,639 INFO L681 BuchiCegarLoop]: Abstraction has 4418 states and 6594 transitions. [2021-12-19 17:58:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states and 6594 transitions. [2021-12-19 17:58:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4418. [2021-12-19 17:58:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4418 states have (on average 1.4925305568130376) internal successors, (6594), 4417 states have internal predecessors, (6594), 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) [2021-12-19 17:58:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 6594 transitions. [2021-12-19 17:58:15,693 INFO L704 BuchiCegarLoop]: Abstraction has 4418 states and 6594 transitions. [2021-12-19 17:58:15,693 INFO L587 BuchiCegarLoop]: Abstraction has 4418 states and 6594 transitions. [2021-12-19 17:58:15,693 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-12-19 17:58:15,693 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 4418 states and 6594 transitions. [2021-12-19 17:58:15,708 INFO L131 ngComponentsAnalysis]: Automaton has 128 accepting balls. 4416 [2021-12-19 17:58:15,708 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:15,708 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:15,709 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:15,709 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] [2021-12-19 17:58:15,709 INFO L791 eck$LassoCheckResult]: Stem: 13515#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(16, 2);call #Ultimate.allocInit(12, 3); 13482#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 13483#L183-1 [2021-12-19 17:58:15,709 INFO L793 eck$LassoCheckResult]: Loop: 13483#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 13834#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 13830#L78 assume !(0 != main_~p1~0#1); 13827#L78-2 assume !(0 != main_~p2~0#1); 13712#L82-1 assume !(0 != main_~p3~0#1); 13713#L86-1 assume !(0 != main_~p4~0#1); 13693#L90-1 assume !(0 != main_~p5~0#1); 13694#L94-1 assume !(0 != main_~p6~0#1); 13674#L98-1 assume !(0 != main_~p7~0#1); 13676#L102-1 assume !(0 != main_~p8~0#1); 13653#L106-1 assume 0 != main_~p9~0#1;main_~lk9~0#1 := 1; 13654#L110-1 assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 13637#L114-1 assume !(0 != main_~p11~0#1); 13638#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 13618#L122-1 assume !(0 != main_~p1~0#1); 13619#L128-1 assume !(0 != main_~p2~0#1); 13867#L133-1 assume !(0 != main_~p3~0#1); 13862#L138-1 assume !(0 != main_~p4~0#1); 13858#L143-1 assume !(0 != main_~p5~0#1); 13824#L148-1 assume !(0 != main_~p6~0#1); 13826#L153-1 assume !(0 != main_~p7~0#1); 13853#L158-1 assume !(0 != main_~p8~0#1); 13850#L163-1 assume !(0 != main_~p9~0#1); 13846#L168-1 assume !(0 != main_~p10~0#1); 13841#L173-1 assume !(0 != main_~p11~0#1); 13838#L178-1 assume !(0 != main_~p12~0#1); 13483#L183-1 [2021-12-19 17:58:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 8 times [2021-12-19 17:58:15,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407456145] [2021-12-19 17:58:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,714 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:15,717 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash 164900234, now seen corresponding path program 1 times [2021-12-19 17:58:15,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:15,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768562963] [2021-12-19 17:58:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:15,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:15,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:15,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768562963] [2021-12-19 17:58:15,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768562963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:15,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:15,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:15,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584160418] [2021-12-19 17:58:15,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:15,732 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:15,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:15,733 INFO L87 Difference]: Start difference. First operand 4418 states and 6594 transitions. cyclomatic complexity: 2304 Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:15,764 INFO L93 Difference]: Finished difference Result 8706 states and 12802 transitions. [2021-12-19 17:58:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:15,765 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8706 states and 12802 transitions. [2021-12-19 17:58:15,832 INFO L131 ngComponentsAnalysis]: Automaton has 256 accepting balls. 8704 [2021-12-19 17:58:15,860 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8706 states to 8706 states and 12802 transitions. [2021-12-19 17:58:15,860 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8706 [2021-12-19 17:58:15,864 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8706 [2021-12-19 17:58:15,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8706 states and 12802 transitions. [2021-12-19 17:58:15,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:15,872 INFO L681 BuchiCegarLoop]: Abstraction has 8706 states and 12802 transitions. [2021-12-19 17:58:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8706 states and 12802 transitions. [2021-12-19 17:58:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8706 to 8706. [2021-12-19 17:58:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8706 states, 8706 states have (on average 1.4704801286469102) internal successors, (12802), 8705 states have internal predecessors, (12802), 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) [2021-12-19 17:58:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8706 states to 8706 states and 12802 transitions. [2021-12-19 17:58:16,009 INFO L704 BuchiCegarLoop]: Abstraction has 8706 states and 12802 transitions. [2021-12-19 17:58:16,009 INFO L587 BuchiCegarLoop]: Abstraction has 8706 states and 12802 transitions. [2021-12-19 17:58:16,009 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-12-19 17:58:16,009 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8706 states and 12802 transitions. [2021-12-19 17:58:16,036 INFO L131 ngComponentsAnalysis]: Automaton has 256 accepting balls. 8704 [2021-12-19 17:58:16,036 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:16,036 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:16,037 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:16,037 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] [2021-12-19 17:58:16,037 INFO L791 eck$LassoCheckResult]: Stem: 26646#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(16, 2);call #Ultimate.allocInit(12, 3); 26612#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 26613#L183-1 [2021-12-19 17:58:16,037 INFO L793 eck$LassoCheckResult]: Loop: 26613#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 27025#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 27021#L78 assume !(0 != main_~p1~0#1); 27018#L78-2 assume !(0 != main_~p2~0#1); 27019#L82-1 assume !(0 != main_~p3~0#1); 27063#L86-1 assume !(0 != main_~p4~0#1); 26838#L90-1 assume !(0 != main_~p5~0#1); 26839#L94-1 assume !(0 != main_~p6~0#1); 26819#L98-1 assume !(0 != main_~p7~0#1); 26821#L102-1 assume !(0 != main_~p8~0#1); 26795#L106-1 assume !(0 != main_~p9~0#1); 26797#L110-1 assume 0 != main_~p10~0#1;main_~lk10~0#1 := 1; 26778#L114-1 assume !(0 != main_~p11~0#1); 26779#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 26759#L122-1 assume !(0 != main_~p1~0#1); 26760#L128-1 assume !(0 != main_~p2~0#1); 27053#L133-1 assume !(0 != main_~p3~0#1); 26987#L138-1 assume !(0 != main_~p4~0#1); 26988#L143-1 assume !(0 != main_~p5~0#1); 27049#L148-1 assume !(0 != main_~p6~0#1); 27047#L153-1 assume !(0 != main_~p7~0#1); 27044#L158-1 assume !(0 != main_~p8~0#1); 27040#L163-1 assume !(0 != main_~p9~0#1); 27037#L168-1 assume !(0 != main_~p10~0#1); 27032#L173-1 assume !(0 != main_~p11~0#1); 27029#L178-1 assume !(0 != main_~p12~0#1); 26613#L183-1 [2021-12-19 17:58:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:16,038 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 9 times [2021-12-19 17:58:16,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:16,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665335446] [2021-12-19 17:58:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:16,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:16,041 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:16,044 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:16,045 INFO L85 PathProgramCache]: Analyzing trace with hash -856168120, now seen corresponding path program 1 times [2021-12-19 17:58:16,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:16,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703157474] [2021-12-19 17:58:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:16,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:16,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:16,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703157474] [2021-12-19 17:58:16,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703157474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:16,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:16,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 17:58:16,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597022640] [2021-12-19 17:58:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:16,060 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:16,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:16,061 INFO L87 Difference]: Start difference. First operand 8706 states and 12802 transitions. cyclomatic complexity: 4352 Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:16,133 INFO L93 Difference]: Finished difference Result 17154 states and 24834 transitions. [2021-12-19 17:58:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:16,134 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17154 states and 24834 transitions. [2021-12-19 17:58:16,209 INFO L131 ngComponentsAnalysis]: Automaton has 512 accepting balls. 17152 [2021-12-19 17:58:16,302 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17154 states to 17154 states and 24834 transitions. [2021-12-19 17:58:16,302 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17154 [2021-12-19 17:58:16,312 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17154 [2021-12-19 17:58:16,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17154 states and 24834 transitions. [2021-12-19 17:58:16,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:16,323 INFO L681 BuchiCegarLoop]: Abstraction has 17154 states and 24834 transitions. [2021-12-19 17:58:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17154 states and 24834 transitions. [2021-12-19 17:58:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17154 to 17154. [2021-12-19 17:58:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17154 states, 17154 states have (on average 1.4477089891570478) internal successors, (24834), 17153 states have internal predecessors, (24834), 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) [2021-12-19 17:58:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17154 states to 17154 states and 24834 transitions. [2021-12-19 17:58:16,630 INFO L704 BuchiCegarLoop]: Abstraction has 17154 states and 24834 transitions. [2021-12-19 17:58:16,630 INFO L587 BuchiCegarLoop]: Abstraction has 17154 states and 24834 transitions. [2021-12-19 17:58:16,630 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-12-19 17:58:16,630 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17154 states and 24834 transitions. [2021-12-19 17:58:16,682 INFO L131 ngComponentsAnalysis]: Automaton has 512 accepting balls. 17152 [2021-12-19 17:58:16,682 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:16,682 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:16,683 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:16,683 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] [2021-12-19 17:58:16,683 INFO L791 eck$LassoCheckResult]: Stem: 52512#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(16, 2);call #Ultimate.allocInit(12, 3); 52479#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 52480#L183-1 [2021-12-19 17:58:16,684 INFO L793 eck$LassoCheckResult]: Loop: 52480#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 53075#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 53070#L78 assume !(0 != main_~p1~0#1); 53071#L78-2 assume !(0 != main_~p2~0#1); 53058#L82-1 assume !(0 != main_~p3~0#1); 53059#L86-1 assume !(0 != main_~p4~0#1); 53047#L90-1 assume !(0 != main_~p5~0#1); 53049#L94-1 assume !(0 != main_~p6~0#1); 53158#L98-1 assume !(0 != main_~p7~0#1); 53150#L102-1 assume !(0 != main_~p8~0#1); 53145#L106-1 assume !(0 != main_~p9~0#1); 53142#L110-1 assume !(0 != main_~p10~0#1); 53137#L114-1 assume !(0 != main_~p11~0#1); 53132#L118-1 assume 0 != main_~p12~0#1;main_~lk12~0#1 := 1; 53127#L122-1 assume !(0 != main_~p1~0#1); 53121#L128-1 assume !(0 != main_~p2~0#1); 53120#L133-1 assume !(0 != main_~p3~0#1); 53116#L138-1 assume !(0 != main_~p4~0#1); 53113#L143-1 assume !(0 != main_~p5~0#1); 53109#L148-1 assume !(0 != main_~p6~0#1); 53105#L153-1 assume !(0 != main_~p7~0#1); 53101#L158-1 assume !(0 != main_~p8~0#1); 53097#L163-1 assume !(0 != main_~p9~0#1); 53089#L168-1 assume !(0 != main_~p10~0#1); 53087#L173-1 assume !(0 != main_~p11~0#1); 53086#L178-1 assume !(0 != main_~p12~0#1); 52480#L183-1 [2021-12-19 17:58:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 10 times [2021-12-19 17:58:16,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:16,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459358240] [2021-12-19 17:58:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:16,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:16,688 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:16,690 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2136031798, now seen corresponding path program 1 times [2021-12-19 17:58:16,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:16,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352400558] [2021-12-19 17:58:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:16,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 17:58:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 17:58:16,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 17:58:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352400558] [2021-12-19 17:58:16,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352400558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 17:58:16,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 17:58:16,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-19 17:58:16,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457892096] [2021-12-19 17:58:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 17:58:16,704 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 17:58:16,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 17:58:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 17:58:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 17:58:16,705 INFO L87 Difference]: Start difference. First operand 17154 states and 24834 transitions. cyclomatic complexity: 8192 Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-19 17:58:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 17:58:16,792 INFO L93 Difference]: Finished difference Result 33794 states and 48130 transitions. [2021-12-19 17:58:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 17:58:16,793 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33794 states and 48130 transitions. [2021-12-19 17:58:17,020 INFO L131 ngComponentsAnalysis]: Automaton has 1024 accepting balls. 33792 [2021-12-19 17:58:17,107 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33794 states to 33794 states and 48130 transitions. [2021-12-19 17:58:17,107 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33794 [2021-12-19 17:58:17,128 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33794 [2021-12-19 17:58:17,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33794 states and 48130 transitions. [2021-12-19 17:58:17,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 17:58:17,151 INFO L681 BuchiCegarLoop]: Abstraction has 33794 states and 48130 transitions. [2021-12-19 17:58:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33794 states and 48130 transitions. [2021-12-19 17:58:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33794 to 33794. [2021-12-19 17:58:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33794 states, 33794 states have (on average 1.4242173166834349) internal successors, (48130), 33793 states have internal predecessors, (48130), 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) [2021-12-19 17:58:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33794 states to 33794 states and 48130 transitions. [2021-12-19 17:58:17,667 INFO L704 BuchiCegarLoop]: Abstraction has 33794 states and 48130 transitions. [2021-12-19 17:58:17,667 INFO L587 BuchiCegarLoop]: Abstraction has 33794 states and 48130 transitions. [2021-12-19 17:58:17,667 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-12-19 17:58:17,667 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 33794 states and 48130 transitions. [2021-12-19 17:58:17,779 INFO L131 ngComponentsAnalysis]: Automaton has 1024 accepting balls. 33792 [2021-12-19 17:58:17,780 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 17:58:17,780 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 17:58:17,780 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-19 17:58:17,780 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] [2021-12-19 17:58:17,781 INFO L791 eck$LassoCheckResult]: Stem: 103466#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(16, 2);call #Ultimate.allocInit(12, 3); 103432#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~nondet5#1, main_#t~nondet6#1, main_#t~nondet7#1, main_#t~nondet8#1, main_#t~nondet9#1, main_#t~nondet10#1, main_#t~nondet11#1, main_#t~nondet12#1, main_#t~nondet13#1, main_#t~nondet14#1, main_#t~nondet15#1, main_#t~nondet16#1, main_~p1~0#1, main_~lk1~0#1, main_~p2~0#1, main_~lk2~0#1, main_~p3~0#1, main_~lk3~0#1, main_~p4~0#1, main_~lk4~0#1, main_~p5~0#1, main_~lk5~0#1, main_~p6~0#1, main_~lk6~0#1, main_~p7~0#1, main_~lk7~0#1, main_~p8~0#1, main_~lk8~0#1, main_~p9~0#1, main_~lk9~0#1, main_~p10~0#1, main_~lk10~0#1, main_~p11~0#1, main_~lk11~0#1, main_~p12~0#1, main_~lk12~0#1, main_~cond~0#1;main_~p1~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1;havoc main_~lk1~0#1;main_~p2~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1;havoc main_~lk2~0#1;main_~p3~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1;havoc main_~lk3~0#1;main_~p4~0#1 := main_#t~nondet7#1;havoc main_#t~nondet7#1;havoc main_~lk4~0#1;main_~p5~0#1 := main_#t~nondet8#1;havoc main_#t~nondet8#1;havoc main_~lk5~0#1;main_~p6~0#1 := main_#t~nondet9#1;havoc main_#t~nondet9#1;havoc main_~lk6~0#1;main_~p7~0#1 := main_#t~nondet10#1;havoc main_#t~nondet10#1;havoc main_~lk7~0#1;main_~p8~0#1 := main_#t~nondet11#1;havoc main_#t~nondet11#1;havoc main_~lk8~0#1;main_~p9~0#1 := main_#t~nondet12#1;havoc main_#t~nondet12#1;havoc main_~lk9~0#1;main_~p10~0#1 := main_#t~nondet13#1;havoc main_#t~nondet13#1;havoc main_~lk10~0#1;main_~p11~0#1 := main_#t~nondet14#1;havoc main_#t~nondet14#1;havoc main_~lk11~0#1;main_~p12~0#1 := main_#t~nondet15#1;havoc main_#t~nondet15#1;havoc main_~lk12~0#1;havoc main_~cond~0#1; 103433#L183-1 [2021-12-19 17:58:17,781 INFO L793 eck$LassoCheckResult]: Loop: 103433#L183-1 assume !false;main_~cond~0#1 := main_#t~nondet16#1;havoc main_#t~nondet16#1; 103596#L49 assume !(0 == main_~cond~0#1);main_~lk1~0#1 := 0;main_~lk2~0#1 := 0;main_~lk3~0#1 := 0;main_~lk4~0#1 := 0;main_~lk5~0#1 := 0;main_~lk6~0#1 := 0;main_~lk7~0#1 := 0;main_~lk8~0#1 := 0;main_~lk9~0#1 := 0;main_~lk10~0#1 := 0;main_~lk11~0#1 := 0;main_~lk12~0#1 := 0; 103594#L78 assume !(0 != main_~p1~0#1); 103590#L78-2 assume !(0 != main_~p2~0#1); 103588#L82-1 assume !(0 != main_~p3~0#1); 103584#L86-1 assume !(0 != main_~p4~0#1); 103580#L90-1 assume !(0 != main_~p5~0#1); 103576#L94-1 assume !(0 != main_~p6~0#1); 103572#L98-1 assume !(0 != main_~p7~0#1); 103568#L102-1 assume !(0 != main_~p8~0#1); 103564#L106-1 assume !(0 != main_~p9~0#1); 103560#L110-1 assume !(0 != main_~p10~0#1); 103558#L114-1 assume !(0 != main_~p11~0#1); 103554#L118-1 assume !(0 != main_~p12~0#1); 103551#L122-1 assume !(0 != main_~p1~0#1); 103552#L128-1 assume !(0 != main_~p2~0#1); 103636#L133-1 assume !(0 != main_~p3~0#1); 103631#L138-1 assume !(0 != main_~p4~0#1); 103627#L143-1 assume !(0 != main_~p5~0#1); 103623#L148-1 assume !(0 != main_~p6~0#1); 103619#L153-1 assume !(0 != main_~p7~0#1); 103615#L158-1 assume !(0 != main_~p8~0#1); 103611#L163-1 assume !(0 != main_~p9~0#1); 103607#L168-1 assume !(0 != main_~p10~0#1); 103603#L173-1 assume !(0 != main_~p11~0#1); 103599#L178-1 assume !(0 != main_~p12~0#1); 103433#L183-1 [2021-12-19 17:58:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 11 times [2021-12-19 17:58:17,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:17,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006815483] [2021-12-19 17:58:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:17,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:17,789 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:17,799 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1572129484, now seen corresponding path program 1 times [2021-12-19 17:58:17,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:17,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431118203] [2021-12-19 17:58:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:17,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:17,819 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:17,827 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 17:58:17,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1068122098, now seen corresponding path program 1 times [2021-12-19 17:58:17,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 17:58:17,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005775221] [2021-12-19 17:58:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 17:58:17,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 17:58:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:17,831 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 17:58:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 17:58:17,850 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 17:58:18,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.12 05:58:18 BoogieIcfgContainer [2021-12-19 17:58:18,138 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-19 17:58:18,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-19 17:58:18,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-19 17:58:18,139 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-19 17:58:18,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:58:14" (3/4) ... [2021-12-19 17:58:18,141 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-19 17:58:18,166 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-19 17:58:18,166 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-19 17:58:18,167 INFO L158 Benchmark]: Toolchain (without parser) took 4112.93ms. Allocated memory was 100.7MB in the beginning and 910.2MB in the end (delta: 809.5MB). Free memory was 70.8MB in the beginning and 591.7MB in the end (delta: -520.9MB). Peak memory consumption was 285.7MB. Max. memory is 16.1GB. [2021-12-19 17:58:18,167 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 17:58:18,167 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.34ms. Allocated memory is still 100.7MB. Free memory was 70.8MB in the beginning and 76.5MB in the end (delta: -5.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-19 17:58:18,168 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.92ms. Allocated memory is still 100.7MB. Free memory was 76.5MB in the beginning and 74.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 17:58:18,168 INFO L158 Benchmark]: Boogie Preprocessor took 13.56ms. Allocated memory is still 100.7MB. Free memory was 74.8MB in the beginning and 73.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-19 17:58:18,168 INFO L158 Benchmark]: RCFGBuilder took 230.10ms. Allocated memory is still 100.7MB. Free memory was 73.4MB in the beginning and 61.8MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-19 17:58:18,168 INFO L158 Benchmark]: BuchiAutomizer took 3555.35ms. Allocated memory was 100.7MB in the beginning and 910.2MB in the end (delta: 809.5MB). Free memory was 61.8MB in the beginning and 593.8MB in the end (delta: -532.0MB). Peak memory consumption was 275.8MB. Max. memory is 16.1GB. [2021-12-19 17:58:18,169 INFO L158 Benchmark]: Witness Printer took 27.50ms. Allocated memory is still 910.2MB. Free memory was 593.8MB in the beginning and 591.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-19 17:58:18,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.34ms. Allocated memory is still 100.7MB. Free memory was 70.8MB in the beginning and 76.5MB in the end (delta: -5.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.92ms. Allocated memory is still 100.7MB. Free memory was 76.5MB in the beginning and 74.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.56ms. Allocated memory is still 100.7MB. Free memory was 74.8MB in the beginning and 73.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 230.10ms. Allocated memory is still 100.7MB. Free memory was 73.4MB in the beginning and 61.8MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * BuchiAutomizer took 3555.35ms. Allocated memory was 100.7MB in the beginning and 910.2MB in the end (delta: 809.5MB). Free memory was 61.8MB in the beginning and 593.8MB in the end (delta: -532.0MB). Peak memory consumption was 275.8MB. Max. memory is 16.1GB. * Witness Printer took 27.50ms. Allocated memory is still 910.2MB. Free memory was 593.8MB in the beginning and 591.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (10 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.10 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 33794 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.5s and 11 iterations. TraceHistogramMax:1. Analysis of lassos took 0.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 0. Minimization of det autom 10. Minimization of nondet autom 0. Automata minimization 1.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.7s Buchi closure took 0.0s. Biggest automaton had 33794 states and ocurred in iteration 10. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 496 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 496 mSDsluCounter, 1552 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 595 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 957 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI10 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 47]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=1} State at position 1 is {p11=0, lk5=0, p1=0, NULL=0, p9=0, lk9=0, NULL=1, lk12=0, cond=4, p5=0, p12=0, p10=0, lk2=0, p4=0, p8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@626f18f7=0, lk11=0, lk6=0, lk1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4628b345=0, p3=0, lk3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1764bed7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@504f962f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@174550d6=0, p7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6985c918=0, \result=0, lk10=0, lk7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7072092c=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6ac01f75=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@61de3d64=0, p6=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5c201269=0, p2=0, lk4=0, lk8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@46d19abf=4, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7a652a54=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@268acc2b=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 47]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L8] int p1 = __VERIFIER_nondet_int(); [L9] int lk1; [L11] int p2 = __VERIFIER_nondet_int(); [L12] int lk2; [L14] int p3 = __VERIFIER_nondet_int(); [L15] int lk3; [L17] int p4 = __VERIFIER_nondet_int(); [L18] int lk4; [L20] int p5 = __VERIFIER_nondet_int(); [L21] int lk5; [L23] int p6 = __VERIFIER_nondet_int(); [L24] int lk6; [L26] int p7 = __VERIFIER_nondet_int(); [L27] int lk7; [L29] int p8 = __VERIFIER_nondet_int(); [L30] int lk8; [L32] int p9 = __VERIFIER_nondet_int(); [L33] int lk9; [L35] int p10 = __VERIFIER_nondet_int(); [L36] int lk10; [L38] int p11 = __VERIFIER_nondet_int(); [L39] int lk11; [L41] int p12 = __VERIFIER_nondet_int(); [L42] int lk12; [L45] int cond; Loop: [L47] COND TRUE 1 [L48] cond = __VERIFIER_nondet_int() [L49] COND FALSE !(cond == 0) [L52] lk1 = 0 [L54] lk2 = 0 [L56] lk3 = 0 [L58] lk4 = 0 [L60] lk5 = 0 [L62] lk6 = 0 [L64] lk7 = 0 [L66] lk8 = 0 [L68] lk9 = 0 [L70] lk10 = 0 [L72] lk11 = 0 [L74] lk12 = 0 [L78] COND FALSE !(p1 != 0) [L82] COND FALSE !(p2 != 0) [L86] COND FALSE !(p3 != 0) [L90] COND FALSE !(p4 != 0) [L94] COND FALSE !(p5 != 0) [L98] COND FALSE !(p6 != 0) [L102] COND FALSE !(p7 != 0) [L106] COND FALSE !(p8 != 0) [L110] COND FALSE !(p9 != 0) [L114] COND FALSE !(p10 != 0) [L118] COND FALSE !(p11 != 0) [L122] COND FALSE !(p12 != 0) [L128] COND FALSE !(p1 != 0) [L133] COND FALSE !(p2 != 0) [L138] COND FALSE !(p3 != 0) [L143] COND FALSE !(p4 != 0) [L148] COND FALSE !(p5 != 0) [L153] COND FALSE !(p6 != 0) [L158] COND FALSE !(p7 != 0) [L163] COND FALSE !(p8 != 0) [L168] COND FALSE !(p9 != 0) [L173] COND FALSE !(p10 != 0) [L178] COND FALSE !(p11 != 0) [L183] COND FALSE !(p12 != 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-12-19 17:58:18,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)