./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-nla/lcm1-both-nt.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e19ca921 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/termination-nla/lcm1-both-nt.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 de9b23e071ad28ec3471a6df711a8ce6d488c1e0c4f71c188ed8181e503af494 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:50:12,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:50:12,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:50:12,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:50:12,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:50:12,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:50:12,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:50:12,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:50:12,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:50:12,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:50:12,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:50:12,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:50:12,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:50:12,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:50:12,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:50:12,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:50:12,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:50:12,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:50:12,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:50:12,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:50:12,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:50:12,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:50:12,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:50:12,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:50:12,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:50:12,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:50:12,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:50:12,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:50:12,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:50:12,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:50:12,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:50:12,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:50:12,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:50:12,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:50:12,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:50:12,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:50:12,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:50:12,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:50:12,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:50:12,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:50:12,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:50:12,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-22 19:50:12,863 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:50:12,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:50:12,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:50:12,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:50:12,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:50:12,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:50:12,865 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:50:12,865 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-22 19:50:12,866 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-22 19:50:12,866 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-22 19:50:12,866 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-22 19:50:12,866 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-22 19:50:12,866 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-22 19:50:12,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:50:12,867 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 19:50:12,867 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:50:12,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:50:12,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 19:50:12,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:50:12,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-22 19:50:12,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-22 19:50:12,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-22 19:50:12,868 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 19:50:12,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:50:12,868 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-22 19:50:12,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:50:12,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-22 19:50:12,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:50:12,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:50:12,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:50:12,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:50:12,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:50:12,870 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-22 19:50:12,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9b23e071ad28ec3471a6df711a8ce6d488c1e0c4f71c188ed8181e503af494 [2021-12-22 19:50:13,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:50:13,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:50:13,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:50:13,100 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:50:13,101 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:50:13,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-nla/lcm1-both-nt.c [2021-12-22 19:50:13,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72cc34827/09dbf0c319b54d23a6d75c6eb533e581/FLAG552fc6c68 [2021-12-22 19:50:13,482 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:50:13,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-nla/lcm1-both-nt.c [2021-12-22 19:50:13,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72cc34827/09dbf0c319b54d23a6d75c6eb533e581/FLAG552fc6c68 [2021-12-22 19:50:13,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72cc34827/09dbf0c319b54d23a6d75c6eb533e581 [2021-12-22 19:50:13,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:50:13,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:50:13,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:50:13,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:50:13,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:50:13,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a263fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13, skipping insertion in model container [2021-12-22 19:50:13,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:50:13,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:50:13,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:50:13,648 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:50:13,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:50:13,669 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:50:13,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13 WrapperNode [2021-12-22 19:50:13,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:50:13,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:50:13,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:50:13,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:50:13,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,689 INFO L137 Inliner]: procedures = 4, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2021-12-22 19:50:13,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:50:13,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:50:13,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:50:13,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:50:13,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:50:13,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:50:13,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:50:13,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:50:13,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (1/1) ... [2021-12-22 19:50:13,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-22 19:50:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:50:13,735 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) [2021-12-22 19:50:13,763 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 [2021-12-22 19:50:13,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:50:13,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:50:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-12-22 19:50:13,815 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:50:13,816 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:50:13,940 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:50:13,944 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:50:13,944 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 19:50:13,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:50:13 BoogieIcfgContainer [2021-12-22 19:50:13,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:50:13,946 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-22 19:50:13,946 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-22 19:50:13,949 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-22 19:50:13,949 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:50:13,949 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.12 07:50:13" (1/3) ... [2021-12-22 19:50:13,950 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2a7aee35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.12 07:50:13, skipping insertion in model container [2021-12-22 19:50:13,950 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:50:13,950 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:50:13" (2/3) ... [2021-12-22 19:50:13,951 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2a7aee35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.12 07:50:13, skipping insertion in model container [2021-12-22 19:50:13,951 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-22 19:50:13,951 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:50:13" (3/3) ... [2021-12-22 19:50:13,952 INFO L388 chiAutomizerObserver]: Analyzing ICFG lcm1-both-nt.c [2021-12-22 19:50:13,987 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-22 19:50:13,987 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-22 19:50:13,987 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-22 19:50:13,987 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-22 19:50:13,987 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-22 19:50:13,987 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-22 19:50:13,987 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-22 19:50:13,988 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-22 19:50:13,997 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-12-22 19:50:14,011 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-22 19:50:14,012 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:50:14,012 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:50:14,016 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-22 19:50:14,016 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-22 19:50:14,016 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-22 19:50:14,016 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2021-12-22 19:50:14,018 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-22 19:50:14,018 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:50:14,018 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:50:14,018 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-22 19:50:14,018 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-22 19:50:14,023 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret0#1, main_#t~ret1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~u~0#1, main_~v~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~u~0#1;havoc main_~v~0#1;call main_#t~ret0#1 := __VERIFIER_nondet_unsigned_int();main_~a~0#1 := main_#t~ret0#1;havoc main_#t~ret0#1;call main_#t~ret1#1 := __VERIFIER_nondet_unsigned_int();main_~b~0#1 := main_#t~ret1#1;havoc main_#t~ret1#1; 6#L33true assume !(((main_~a~0#1 % 4294967296 < 1 || main_~b~0#1 % 4294967296 < 1) || main_~a~0#1 % 4294967296 > 65535) || main_~b~0#1 % 4294967296 > 65535);main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~u~0#1 := main_~b~0#1;main_~v~0#1 := 0; 10#L55-2true [2021-12-22 19:50:14,023 INFO L793 eck$LassoCheckResult]: Loop: 10#L55-2true assume !false; 5#L44true assume !!((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 12#L47-2true assume !true; 8#L55-1true assume !true; 10#L55-2true [2021-12-22 19:50:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:50:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 1 times [2021-12-22 19:50:14,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:50:14,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204815983] [2021-12-22 19:50:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:14,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:50:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:50:14,129 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:50:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:50:14,165 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:50:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:50:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1421558, now seen corresponding path program 1 times [2021-12-22 19:50:14,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:50:14,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084688292] [2021-12-22 19:50:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:14,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:50:14,175 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:50:14,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017246952] [2021-12-22 19:50:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:14,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:50:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:50:14,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:50:14,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 19:50:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:50:14,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-22 19:50:14,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:50:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:50:14,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:50:14,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:50:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084688292] [2021-12-22 19:50:14,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:50:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017246952] [2021-12-22 19:50:14,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017246952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:50:14,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:50:14,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:50:14,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611354023] [2021-12-22 19:50:14,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:50:14,240 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-22 19:50:14,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:50:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 19:50:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 19:50:14,286 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-12-22 19:50:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:50:14,291 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2021-12-22 19:50:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 19:50:14,294 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2021-12-22 19:50:14,296 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-22 19:50:14,298 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 11 transitions. [2021-12-22 19:50:14,299 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2021-12-22 19:50:14,299 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-12-22 19:50:14,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2021-12-22 19:50:14,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 19:50:14,300 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-12-22 19:50:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2021-12-22 19:50:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-22 19:50:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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) [2021-12-22 19:50:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-12-22 19:50:14,315 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-12-22 19:50:14,315 INFO L587 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-12-22 19:50:14,315 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-22 19:50:14,316 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 11 transitions. [2021-12-22 19:50:14,316 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-22 19:50:14,316 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:50:14,316 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:50:14,316 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-22 19:50:14,316 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-22 19:50:14,317 INFO L791 eck$LassoCheckResult]: Stem: 45#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 46#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret0#1, main_#t~ret1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~u~0#1, main_~v~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~u~0#1;havoc main_~v~0#1;call main_#t~ret0#1 := __VERIFIER_nondet_unsigned_int();main_~a~0#1 := main_#t~ret0#1;havoc main_#t~ret0#1;call main_#t~ret1#1 := __VERIFIER_nondet_unsigned_int();main_~b~0#1 := main_#t~ret1#1;havoc main_#t~ret1#1; 51#L33 assume !(((main_~a~0#1 % 4294967296 < 1 || main_~b~0#1 % 4294967296 < 1) || main_~a~0#1 % 4294967296 > 65535) || main_~b~0#1 % 4294967296 > 65535);main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~u~0#1 := main_~b~0#1;main_~v~0#1 := 0; 50#L55-2 [2021-12-22 19:50:14,317 INFO L793 eck$LassoCheckResult]: Loop: 50#L55-2 assume !false; 47#L44 assume !!((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 48#L47-2 assume !false; 49#L49 assume !((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 43#L55-1 assume !false; 44#L57 assume !((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 50#L55-2 [2021-12-22 19:50:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:50:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 2 times [2021-12-22 19:50:14,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:50:14,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644051940] [2021-12-22 19:50:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:14,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:50:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:50:14,326 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:50:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:50:14,331 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:50:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:50:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1365890956, now seen corresponding path program 1 times [2021-12-22 19:50:14,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:50:14,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440354822] [2021-12-22 19:50:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:14,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:50:14,335 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:50:14,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554740757] [2021-12-22 19:50:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:14,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:50:14,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:50:14,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:50:14,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 19:50:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:50:14,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:50:14,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:50:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:50:14,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:50:14,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:50:14,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440354822] [2021-12-22 19:50:14,440 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:50:14,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554740757] [2021-12-22 19:50:14,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554740757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:50:14,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:50:14,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:50:14,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575384029] [2021-12-22 19:50:14,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:50:14,441 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-22 19:50:14,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:50:14,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:50:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:50:14,444 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:50:26,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-22 19:50:38,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-22 19:50:50,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-22 19:50:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:50:50,649 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-12-22 19:50:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:50:50,686 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 15 transitions. [2021-12-22 19:50:50,687 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-12-22 19:50:50,687 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 15 transitions. [2021-12-22 19:50:50,687 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-12-22 19:50:50,687 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-12-22 19:50:50,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2021-12-22 19:50:50,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 19:50:50,687 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-22 19:50:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2021-12-22 19:50:50,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2021-12-22 19:50:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-12-22 19:50:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-12-22 19:50:50,690 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-12-22 19:50:50,690 INFO L587 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-12-22 19:50:50,690 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-22 19:50:50,690 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 13 transitions. [2021-12-22 19:50:50,691 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-12-22 19:50:50,691 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-22 19:50:50,691 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-22 19:50:50,691 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-22 19:50:50,691 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-22 19:50:50,691 INFO L791 eck$LassoCheckResult]: Stem: 88#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 89#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret0#1, main_#t~ret1#1, main_~a~0#1, main_~b~0#1, main_~x~0#1, main_~y~0#1, main_~u~0#1, main_~v~0#1;havoc main_~a~0#1;havoc main_~b~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~u~0#1;havoc main_~v~0#1;call main_#t~ret0#1 := __VERIFIER_nondet_unsigned_int();main_~a~0#1 := main_#t~ret0#1;havoc main_#t~ret0#1;call main_#t~ret1#1 := __VERIFIER_nondet_unsigned_int();main_~b~0#1 := main_#t~ret1#1;havoc main_#t~ret1#1; 95#L33 assume !(((main_~a~0#1 % 4294967296 < 1 || main_~b~0#1 % 4294967296 < 1) || main_~a~0#1 % 4294967296 > 65535) || main_~b~0#1 % 4294967296 > 65535);main_~x~0#1 := main_~a~0#1;main_~y~0#1 := main_~b~0#1;main_~u~0#1 := main_~b~0#1;main_~v~0#1 := 0; 94#L55-2 [2021-12-22 19:50:50,691 INFO L793 eck$LassoCheckResult]: Loop: 94#L55-2 assume !false; 90#L44 assume !!((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 91#L47-2 assume !false; 92#L49 assume !!((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296);main_~x~0#1 := main_~x~0#1 - main_~y~0#1;main_~v~0#1 := main_~v~0#1 + main_~u~0#1; 93#L47-2 assume !false; 96#L49 assume !((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 86#L55-1 assume !false; 87#L57 assume !((main_~x~0#1 * main_~u~0#1 + main_~y~0#1 * main_~v~0#1) % 4294967296 == main_~a~0#1 * main_~b~0#1 % 4294967296); 94#L55-2 [2021-12-22 19:50:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:50:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 3 times [2021-12-22 19:50:50,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:50:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194272860] [2021-12-22 19:50:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:50,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:50:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:50:50,700 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:50:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:50:50,725 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:50:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:50:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1637427375, now seen corresponding path program 1 times [2021-12-22 19:50:50,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:50:50,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281034792] [2021-12-22 19:50:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:50,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:50:50,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:50:50,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41903254] [2021-12-22 19:50:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:50:50,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:50:50,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:50:50,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:50:50,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process