./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-nla/fermat2-both-nt.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/termination-nla/fermat2-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 f6526f5a892659c99c1d2ecabe62b91374d0d296de10757956a755898419d0c0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:23:39,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:23:39,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:23:39,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:23:39,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:23:39,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:23:39,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:23:39,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:23:39,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:23:39,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:23:39,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:23:39,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:23:39,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:23:39,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:23:39,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:23:39,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:23:39,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:23:39,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:23:39,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:23:39,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:23:39,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:23:39,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:23:39,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:23:39,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:23:39,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:23:39,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:23:39,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:23:39,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:23:39,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:23:39,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:23:39,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:23:39,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:23:39,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:23:39,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:23:39,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:23:39,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:23:39,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:23:39,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:23:39,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:23:39,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:23:39,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:23:39,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-16 09:23:39,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:23:39,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:23:39,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:23:39,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:23:39,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:23:39,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:23:39,874 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:23:39,874 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-16 09:23:39,875 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-16 09:23:39,875 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-16 09:23:39,875 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-16 09:23:39,876 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-16 09:23:39,876 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-16 09:23:39,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:23:39,876 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 09:23:39,876 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:23:39,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:23:39,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 09:23:39,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:23:39,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-16 09:23:39,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-16 09:23:39,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-16 09:23:39,877 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 09:23:39,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:23:39,878 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-16 09:23:39,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:23:39,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-16 09:23:39,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:23:39,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:23:39,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:23:39,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:23:39,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:23:39,881 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-16 09:23:39,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6526f5a892659c99c1d2ecabe62b91374d0d296de10757956a755898419d0c0 [2021-12-16 09:23:40,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:23:40,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:23:40,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:23:40,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:23:40,090 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:23:40,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-nla/fermat2-both-nt.c [2021-12-16 09:23:40,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a20184b/80daeaff80924cc693e18cab155e91da/FLAGc6886c918 [2021-12-16 09:23:40,439 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:23:40,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-nla/fermat2-both-nt.c [2021-12-16 09:23:40,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a20184b/80daeaff80924cc693e18cab155e91da/FLAGc6886c918 [2021-12-16 09:23:40,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a20184b/80daeaff80924cc693e18cab155e91da [2021-12-16 09:23:40,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:23:40,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:23:40,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:23:40,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:23:40,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:23:40,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:23:40" (1/1) ... [2021-12-16 09:23:40,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df183e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:40, skipping insertion in model container [2021-12-16 09:23:40,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:23:40" (1/1) ... [2021-12-16 09:23:40,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:23:40,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:23:41,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:23:41,008 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:23:41,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:23:41,027 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:23:41,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41 WrapperNode [2021-12-16 09:23:41,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:23:41,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:23:41,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:23:41,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:23:41,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,058 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2021-12-16 09:23:41,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:23:41,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:23:41,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:23:41,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:23:41,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:23:41,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:23:41,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:23:41,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:23:41,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (1/1) ... [2021-12-16 09:23:41,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:23:41,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:23:41,121 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) [2021-12-16 09:23:41,130 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 [2021-12-16 09:23:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:23:41,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:23:41,183 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:23:41,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:23:41,270 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:23:41,274 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:23:41,274 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 09:23:41,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:23:41 BoogieIcfgContainer [2021-12-16 09:23:41,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:23:41,277 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-16 09:23:41,277 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-16 09:23:41,279 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-16 09:23:41,279 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:23:41,279 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.12 09:23:40" (1/3) ... [2021-12-16 09:23:41,280 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@28f38594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:23:41, skipping insertion in model container [2021-12-16 09:23:41,280 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:23:41,280 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:23:41" (2/3) ... [2021-12-16 09:23:41,280 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@28f38594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:23:41, skipping insertion in model container [2021-12-16 09:23:41,280 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:23:41,281 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:23:41" (3/3) ... [2021-12-16 09:23:41,281 INFO L388 chiAutomizerObserver]: Analyzing ICFG fermat2-both-nt.c [2021-12-16 09:23:41,310 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-16 09:23:41,310 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-16 09:23:41,310 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-16 09:23:41,311 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-16 09:23:41,311 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-16 09:23:41,311 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-16 09:23:41,311 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-16 09:23:41,311 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-16 09:23:41,320 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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) [2021-12-16 09:23:41,332 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:23:41,332 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:23:41,332 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:23:41,336 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-16 09:23:41,336 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 09:23:41,336 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-16 09:23:41,336 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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) [2021-12-16 09:23:41,337 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:23:41,337 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:23:41,337 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:23:41,338 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-16 09:23:41,338 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 09:23:41,342 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_#t~nondet3#1, main_#t~post4#1, main_#t~post5#1, main_~c~0#1, main_~k~0#1, main_~A~0#1, main_~R~0#1, main_~u~0#1, main_~v~0#1, main_~r~0#1, main_~cc~0#1, main_~kk~0#1;havoc main_~A~0#1;havoc main_~R~0#1;havoc main_~u~0#1;havoc main_~v~0#1;havoc main_~r~0#1;main_~A~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~R~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 7#L27true assume !((main_~R~0#1 - 1) * (main_~R~0#1 - 1) >= main_~A~0#1); 5#L30true assume !(1 != (if main_~A~0#1 < 0 && 0 != main_~A~0#1 % 2 then main_~A~0#1 % 2 - 2 else main_~A~0#1 % 2));main_~u~0#1 := 1 + 2 * main_~R~0#1;main_~v~0#1 := 1;main_~r~0#1 := main_~R~0#1 * main_~R~0#1 - main_~A~0#1;main_~cc~0#1 := 0;main_~kk~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 13#L38-2true [2021-12-16 09:23:41,343 INFO L793 eck$LassoCheckResult]: Loop: 13#L38-2true assume !!(main_~u~0#1 * main_~u~0#1 - main_~v~0#1 * main_~v~0#1 - 2 * main_~u~0#1 + 2 * main_~v~0#1 - 4 * (main_~A~0#1 + main_~r~0#1) + main_~cc~0#1 < main_~kk~0#1);main_~c~0#1 := 0;main_~k~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; 10#L43-2true assume !true; 11#L50-1true assume !(4 * (main_~A~0#1 + main_~r~0#1) - main_~u~0#1 * main_~u~0#1 - main_~v~0#1 * main_~v~0#1 - 2 * main_~u~0#1 + 2 * main_~v~0#1 + main_~c~0#1 <= main_~k~0#1); 6#L50-2true main_#t~post5#1 := main_~cc~0#1;main_~cc~0#1 := 1 + main_#t~post5#1;havoc main_#t~post5#1; 13#L38-2true [2021-12-16 09:23:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:23:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash 925672, now seen corresponding path program 1 times [2021-12-16 09:23:41,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:23:41,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376517438] [2021-12-16 09:23:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:23:41,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 09:23:41,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414168340] [2021-12-16 09:23:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:23:41,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:23:41,438 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) [2021-12-16 09:23:41,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 09:23:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:23:41,481 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:23:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:23:41,508 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:23:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:23:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1581138, now seen corresponding path program 1 times [2021-12-16 09:23:41,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:23:41,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475089743] [2021-12-16 09:23:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:23:41,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 09:23:41,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591251900] [2021-12-16 09:23:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:23:41,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:23:41,518 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) [2021-12-16 09:23:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:23:41,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-16 09:23:41,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:23:41,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 09:23:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:23:41,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 09:23:41,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:23:41,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475089743] [2021-12-16 09:23:41,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 09:23:41,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591251900] [2021-12-16 09:23:41,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591251900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:23:41,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:23:41,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 09:23:41,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010090571] [2021-12-16 09:23:41,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:23:41,571 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-16 09:23:41,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:23:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 09:23:41,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 09:23:41,597 INFO L87 Difference]: Start difference. First operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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) [2021-12-16 09:23:41,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:23:41,602 INFO L93 Difference]: Finished difference Result 12 states and 16 transitions. [2021-12-16 09:23:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 09:23:41,607 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 16 transitions. [2021-12-16 09:23:41,609 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:23:41,612 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 8 states and 10 transitions. [2021-12-16 09:23:41,613 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-16 09:23:41,613 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-12-16 09:23:41,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 10 transitions. [2021-12-16 09:23:41,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 09:23:41,615 INFO L681 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-12-16 09:23:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 10 transitions. [2021-12-16 09:23:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-16 09:23:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-12-16 09:23:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-12-16 09:23:41,633 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-12-16 09:23:41,633 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-12-16 09:23:41,633 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-16 09:23:41,633 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 10 transitions. [2021-12-16 09:23:41,634 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:23:41,634 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:23:41,634 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:23:41,634 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-16 09:23:41,634 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 09:23:41,635 INFO L791 eck$LassoCheckResult]: Stem: 44#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 45#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_#t~nondet2#1, main_#t~nondet3#1, main_#t~post4#1, main_#t~post5#1, main_~c~0#1, main_~k~0#1, main_~A~0#1, main_~R~0#1, main_~u~0#1, main_~v~0#1, main_~r~0#1, main_~cc~0#1, main_~kk~0#1;havoc main_~A~0#1;havoc main_~R~0#1;havoc main_~u~0#1;havoc main_~v~0#1;havoc main_~r~0#1;main_~A~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~R~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 46#L27 assume !((main_~R~0#1 - 1) * (main_~R~0#1 - 1) >= main_~A~0#1); 41#L30 assume !(1 != (if main_~A~0#1 < 0 && 0 != main_~A~0#1 % 2 then main_~A~0#1 % 2 - 2 else main_~A~0#1 % 2));main_~u~0#1 := 1 + 2 * main_~R~0#1;main_~v~0#1 := 1;main_~r~0#1 := main_~R~0#1 * main_~R~0#1 - main_~A~0#1;main_~cc~0#1 := 0;main_~kk~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 42#L38-2 [2021-12-16 09:23:41,635 INFO L793 eck$LassoCheckResult]: Loop: 42#L38-2 assume !!(main_~u~0#1 * main_~u~0#1 - main_~v~0#1 * main_~v~0#1 - 2 * main_~u~0#1 + 2 * main_~v~0#1 - 4 * (main_~A~0#1 + main_~r~0#1) + main_~cc~0#1 < main_~kk~0#1);main_~c~0#1 := 0;main_~k~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; 47#L43-2 assume !(4 * (main_~A~0#1 + main_~r~0#1) == main_~u~0#1 * main_~u~0#1 - main_~v~0#1 * main_~v~0#1 - 2 * main_~u~0#1 + 2 * main_~v~0#1); 48#L50-1 assume !(4 * (main_~A~0#1 + main_~r~0#1) - main_~u~0#1 * main_~u~0#1 - main_~v~0#1 * main_~v~0#1 - 2 * main_~u~0#1 + 2 * main_~v~0#1 + main_~c~0#1 <= main_~k~0#1); 43#L50-2 main_#t~post5#1 := main_~cc~0#1;main_~cc~0#1 := 1 + main_#t~post5#1;havoc main_#t~post5#1; 42#L38-2 [2021-12-16 09:23:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:23:41,640 INFO L85 PathProgramCache]: Analyzing trace with hash 925672, now seen corresponding path program 2 times [2021-12-16 09:23:41,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:23:41,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373443140] [2021-12-16 09:23:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:23:41,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 09:23:41,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605996636] [2021-12-16 09:23:41,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:23:41,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:23:41,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:23:41,692 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) [2021-12-16 09:23:41,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 09:23:41,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 09:23:41,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-12-16 09:23:41,726 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:23:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:23:41,736 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:23:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:23:41,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1577294, now seen corresponding path program 1 times [2021-12-16 09:23:41,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:23:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962643530] [2021-12-16 09:23:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:23:41,740 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 09:23:41,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065214038] [2021-12-16 09:23:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:23:41,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:23:41,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:23:41,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 09:23:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:23:41,775 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:23:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:23:41,783 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:23:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:23:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash 179692981, now seen corresponding path program 1 times [2021-12-16 09:23:41,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:23:41,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731806538] [2021-12-16 09:23:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:23:41,789 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 09:23:41,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797303389] [2021-12-16 09:23:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:23:41,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:23:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:23:41,808 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:23:41,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process