./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_2_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_2_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f3a518e2178ada847d08214b3921c5447bcf5e7ad9d30e9f833babec7755c7f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 08:52:58,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 08:52:58,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 08:52:58,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 08:52:58,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 08:52:58,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 08:52:58,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 08:52:58,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 08:52:58,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 08:52:58,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 08:52:58,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 08:52:58,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 08:52:58,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 08:52:58,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 08:52:58,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 08:52:58,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 08:52:58,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 08:52:58,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 08:52:58,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 08:52:58,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 08:52:58,277 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 08:52:58,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 08:52:58,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 08:52:58,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 08:52:58,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 08:52:58,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 08:52:58,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 08:52:58,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 08:52:58,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 08:52:58,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 08:52:58,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 08:52:58,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 08:52:58,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 08:52:58,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 08:52:58,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 08:52:58,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 08:52:58,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 08:52:58,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 08:52:58,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 08:52:58,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 08:52:58,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 08:52:58,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 08:52:58,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 08:52:58,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 08:52:58,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 08:52:58,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 08:52:58,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 08:52:58,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 08:52:58,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 08:52:58,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 08:52:58,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 08:52:58,330 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 08:52:58,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 08:52:58,332 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 08:52:58,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 08:52:58,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 08:52:58,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 08:52:58,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 08:52:58,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 08:52:58,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 08:52:58,333 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 08:52:58,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 08:52:58,334 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 08:52:58,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 08:52:58,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 08:52:58,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 08:52:58,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 08:52:58,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:52:58,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 08:52:58,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 08:52:58,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 08:52:58,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 08:52:58,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 08:52:58,336 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 08:52:58,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 08:52:58,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 08:52:58,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f3a518e2178ada847d08214b3921c5447bcf5e7ad9d30e9f833babec7755c7f [2022-07-12 08:52:58,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 08:52:58,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 08:52:58,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 08:52:58,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 08:52:58,657 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 08:52:58,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_1.i [2022-07-12 08:52:58,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f22524dd9/06e82d81be164d0d89f0bdb8041ddaa5/FLAGce813a085 [2022-07-12 08:52:59,113 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 08:52:59,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i [2022-07-12 08:52:59,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f22524dd9/06e82d81be164d0d89f0bdb8041ddaa5/FLAGce813a085 [2022-07-12 08:52:59,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f22524dd9/06e82d81be164d0d89f0bdb8041ddaa5 [2022-07-12 08:52:59,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 08:52:59,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 08:52:59,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 08:52:59,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 08:52:59,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 08:52:59,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1637dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59, skipping insertion in model container [2022-07-12 08:52:59,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 08:52:59,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 08:52:59,694 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i[1224,1237] [2022-07-12 08:52:59,712 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i[2827,2840] [2022-07-12 08:52:59,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:52:59,720 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 08:52:59,730 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i[1224,1237] [2022-07-12 08:52:59,738 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i[2827,2840] [2022-07-12 08:52:59,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:52:59,751 INFO L208 MainTranslator]: Completed translation [2022-07-12 08:52:59,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59 WrapperNode [2022-07-12 08:52:59,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 08:52:59,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 08:52:59,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 08:52:59,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 08:52:59,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,781 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 72 [2022-07-12 08:52:59,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 08:52:59,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 08:52:59,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 08:52:59,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 08:52:59,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 08:52:59,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 08:52:59,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 08:52:59,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 08:52:59,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (1/1) ... [2022-07-12 08:52:59,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:52:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:52:59,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 08:52:59,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 08:52:59,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 08:52:59,884 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-12 08:52:59,885 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-12 08:52:59,885 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-12 08:52:59,886 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-12 08:52:59,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 08:52:59,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 08:52:59,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 08:52:59,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 08:52:59,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 08:52:59,948 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 08:52:59,949 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 08:53:00,110 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 08:53:00,115 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 08:53:00,121 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 08:53:00,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:53:00 BoogieIcfgContainer [2022-07-12 08:53:00,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 08:53:00,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 08:53:00,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 08:53:00,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 08:53:00,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 08:52:59" (1/3) ... [2022-07-12 08:53:00,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7088043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:53:00, skipping insertion in model container [2022-07-12 08:53:00,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:52:59" (2/3) ... [2022-07-12 08:53:00,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7088043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:53:00, skipping insertion in model container [2022-07-12 08:53:00,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:53:00" (3/3) ... [2022-07-12 08:53:00,143 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_1.i [2022-07-12 08:53:00,155 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 08:53:00,171 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 08:53:00,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 08:53:00,245 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@645dc138, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4e37f570 [2022-07-12 08:53:00,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 08:53:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 08:53:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:53:00,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:00,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:00,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-07-12 08:53:00,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:53:00,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875670193] [2022-07-12 08:53:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:53:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:53:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:00,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:53:00,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875670193] [2022-07-12 08:53:00,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875670193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:53:00,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:53:00,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 08:53:00,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629447429] [2022-07-12 08:53:00,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:53:00,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 08:53:00,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:53:00,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 08:53:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:00,573 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:00,633 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-07-12 08:53:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 08:53:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 08:53:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:00,641 INFO L225 Difference]: With dead ends: 93 [2022-07-12 08:53:00,642 INFO L226 Difference]: Without dead ends: 43 [2022-07-12 08:53:00,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:00,647 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:00,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:53:00,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-12 08:53:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-07-12 08:53:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-12 08:53:00,679 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-07-12 08:53:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:00,680 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-12 08:53:00,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-12 08:53:00,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 08:53:00,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:00,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:00,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 08:53:00,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:00,683 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-07-12 08:53:00,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:53:00,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611596172] [2022-07-12 08:53:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:00,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:53:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:53:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:00,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:53:00,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611596172] [2022-07-12 08:53:00,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611596172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:53:00,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:53:00,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 08:53:00,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22694085] [2022-07-12 08:53:00,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:53:00,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 08:53:00,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:53:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 08:53:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:00,713 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:00,728 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-07-12 08:53:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 08:53:00,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 08:53:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:00,730 INFO L225 Difference]: With dead ends: 52 [2022-07-12 08:53:00,730 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 08:53:00,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:00,732 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:00,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:53:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 08:53:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-12 08:53:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-07-12 08:53:00,740 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-07-12 08:53:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:00,740 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-07-12 08:53:00,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:00,740 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-07-12 08:53:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 08:53:00,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:00,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:00,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 08:53:00,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-07-12 08:53:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:53:00,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556513523] [2022-07-12 08:53:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:53:00,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:53:00,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261999738] [2022-07-12 08:53:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:00,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:53:00,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:53:00,762 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) [2022-07-12 08:53:00,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 08:53:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:53:00,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 08:53:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:53:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:00,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:53:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:00,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:53:00,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556513523] [2022-07-12 08:53:00,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:53:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261999738] [2022-07-12 08:53:00,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261999738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:53:00,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:53:00,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-12 08:53:00,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307674730] [2022-07-12 08:53:00,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:53:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 08:53:00,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:53:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 08:53:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 08:53:00,939 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:00,975 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-07-12 08:53:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 08:53:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-12 08:53:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:00,976 INFO L225 Difference]: With dead ends: 55 [2022-07-12 08:53:00,976 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 08:53:00,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 08:53:00,978 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:00,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:53:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 08:53:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-12 08:53:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-12 08:53:00,985 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2022-07-12 08:53:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:00,985 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-12 08:53:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-12 08:53:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 08:53:00,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:00,986 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:01,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 08:53:01,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:53:01,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1992731711, now seen corresponding path program 1 times [2022-07-12 08:53:01,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:53:01,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894250179] [2022-07-12 08:53:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:01,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:53:01,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:53:01,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719893067] [2022-07-12 08:53:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:01,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:53:01,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:53:01,246 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) [2022-07-12 08:53:01,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 08:53:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:53:01,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 08:53:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:53:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:01,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:53:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:01,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:53:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894250179] [2022-07-12 08:53:01,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:53:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719893067] [2022-07-12 08:53:01,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719893067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:53:01,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:53:01,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 08:53:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935196534] [2022-07-12 08:53:01,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:53:01,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 08:53:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:53:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 08:53:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-12 08:53:01,558 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:01,638 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-12 08:53:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 08:53:01,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 08:53:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:01,639 INFO L225 Difference]: With dead ends: 57 [2022-07-12 08:53:01,640 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 08:53:01,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-12 08:53:01,642 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:01,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 198 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:53:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 08:53:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-12 08:53:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-07-12 08:53:01,653 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2022-07-12 08:53:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:01,654 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-07-12 08:53:01,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-07-12 08:53:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 08:53:01,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:01,655 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:01,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 08:53:01,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 08:53:01,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2022-07-12 08:53:01,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:53:01,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029768569] [2022-07-12 08:53:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:01,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:53:01,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:53:01,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104668411] [2022-07-12 08:53:01,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 08:53:01,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:53:01,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:53:01,874 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) [2022-07-12 08:53:01,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 08:53:01,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 08:53:01,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 08:53:01,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 08:53:01,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:53:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:02,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:53:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:02,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:53:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029768569] [2022-07-12 08:53:02,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:53:02,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104668411] [2022-07-12 08:53:02,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104668411] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:53:02,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:53:02,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-12 08:53:02,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950443907] [2022-07-12 08:53:02,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:53:02,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 08:53:02,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:53:02,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 08:53:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-12 08:53:02,127 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:02,205 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2022-07-12 08:53:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 08:53:02,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 08:53:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:02,207 INFO L225 Difference]: With dead ends: 65 [2022-07-12 08:53:02,207 INFO L226 Difference]: Without dead ends: 50 [2022-07-12 08:53:02,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-07-12 08:53:02,208 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:02,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:53:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-12 08:53:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-12 08:53:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-07-12 08:53:02,216 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2022-07-12 08:53:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:02,216 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-07-12 08:53:02,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-07-12 08:53:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 08:53:02,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:02,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:02,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 08:53:02,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:53:02,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-07-12 08:53:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:53:02,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566432967] [2022-07-12 08:53:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:53:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 08:53:02,446 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 08:53:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 08:53:02,474 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 08:53:02,474 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 08:53:02,475 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-12 08:53:02,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 08:53:02,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 08:53:02,480 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-07-12 08:53:02,484 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 08:53:02,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 08:53:02 BoogieIcfgContainer [2022-07-12 08:53:02,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 08:53:02,503 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 08:53:02,504 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 08:53:02,504 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 08:53:02,504 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:53:00" (3/4) ... [2022-07-12 08:53:02,506 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-12 08:53:02,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 08:53:02,507 INFO L158 Benchmark]: Toolchain (without parser) took 2968.92ms. Allocated memory is still 115.3MB. Free memory was 78.0MB in the beginning and 50.4MB in the end (delta: 27.6MB). Peak memory consumption was 30.2MB. Max. memory is 16.1GB. [2022-07-12 08:53:02,507 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 115.3MB. Free memory is still 94.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 08:53:02,508 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.07ms. Allocated memory is still 115.3MB. Free memory was 77.6MB in the beginning and 67.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 08:53:02,508 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.41ms. Allocated memory is still 115.3MB. Free memory was 67.0MB in the beginning and 65.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 08:53:02,508 INFO L158 Benchmark]: Boogie Preprocessor took 19.07ms. Allocated memory is still 115.3MB. Free memory was 65.3MB in the beginning and 64.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 08:53:02,508 INFO L158 Benchmark]: RCFGBuilder took 321.29ms. Allocated memory is still 115.3MB. Free memory was 63.9MB in the beginning and 52.4MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-12 08:53:02,509 INFO L158 Benchmark]: TraceAbstraction took 2378.47ms. Allocated memory is still 115.3MB. Free memory was 51.9MB in the beginning and 50.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2022-07-12 08:53:02,509 INFO L158 Benchmark]: Witness Printer took 3.20ms. Allocated memory is still 115.3MB. Free memory is still 50.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 08:53:02,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 115.3MB. Free memory is still 94.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.07ms. Allocated memory is still 115.3MB. Free memory was 77.6MB in the beginning and 67.0MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.41ms. Allocated memory is still 115.3MB. Free memory was 67.0MB in the beginning and 65.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.07ms. Allocated memory is still 115.3MB. Free memory was 65.3MB in the beginning and 64.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 321.29ms. Allocated memory is still 115.3MB. Free memory was 63.9MB in the beginning and 52.4MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2378.47ms. Allocated memory is still 115.3MB. Free memory was 51.9MB in the beginning and 50.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. * Witness Printer took 3.20ms. Allocated memory is still 115.3MB. Free memory is still 50.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.2f && IN < 0.2f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.2f && IN < 0.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=53] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=53, x=53] [L100] RET, EXPR f(IN) VAL [f(IN)=50, IN=53] [L100] CALL, EXPR fp(IN) VAL [\old(x)=53] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=53, x=53] [L100] RET, EXPR fp(IN) VAL [f(IN)=50, fp(IN)=49, IN=53] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=51] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR f(x) VAL [f(x)=54, IN=53, x=51] [L102] CALL, EXPR fp(x) VAL [\old(x)=51] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR fp(x) VAL [f(x)=54, fp(x)=52, IN=53, x=51] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=53] [L109] reach_error() VAL [IN=53] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33 mSDsluCounter, 754 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 560 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 155 IncrementalHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 194 mSDtfsCounter, 155 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 435 SizeOfPredicates, 17 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 12/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-12 08:53:02,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_2_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f3a518e2178ada847d08214b3921c5447bcf5e7ad9d30e9f833babec7755c7f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 08:53:04,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 08:53:04,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 08:53:04,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 08:53:04,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 08:53:04,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 08:53:04,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 08:53:04,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 08:53:04,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 08:53:04,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 08:53:04,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 08:53:04,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 08:53:04,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 08:53:04,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 08:53:04,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 08:53:04,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 08:53:04,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 08:53:04,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 08:53:04,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 08:53:04,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 08:53:04,588 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 08:53:04,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 08:53:04,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 08:53:04,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 08:53:04,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 08:53:04,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 08:53:04,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 08:53:04,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 08:53:04,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 08:53:04,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 08:53:04,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 08:53:04,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 08:53:04,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 08:53:04,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 08:53:04,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 08:53:04,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 08:53:04,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 08:53:04,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 08:53:04,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 08:53:04,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 08:53:04,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 08:53:04,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 08:53:04,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-12 08:53:04,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 08:53:04,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 08:53:04,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 08:53:04,653 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 08:53:04,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 08:53:04,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 08:53:04,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 08:53:04,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 08:53:04,655 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 08:53:04,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 08:53:04,656 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 08:53:04,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 08:53:04,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 08:53:04,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 08:53:04,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 08:53:04,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 08:53:04,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 08:53:04,657 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 08:53:04,657 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 08:53:04,657 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 08:53:04,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 08:53:04,657 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 08:53:04,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 08:53:04,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 08:53:04,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 08:53:04,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 08:53:04,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:53:04,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 08:53:04,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 08:53:04,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 08:53:04,659 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 08:53:04,659 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 08:53:04,659 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 08:53:04,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 08:53:04,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 08:53:04,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 08:53:04,660 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f3a518e2178ada847d08214b3921c5447bcf5e7ad9d30e9f833babec7755c7f [2022-07-12 08:53:04,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 08:53:04,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 08:53:04,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 08:53:04,955 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 08:53:04,956 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 08:53:04,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_1.i [2022-07-12 08:53:05,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84d7bebe/2f9e8229d94143be96f06a29897917cb/FLAG13426d9a2 [2022-07-12 08:53:05,452 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 08:53:05,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i [2022-07-12 08:53:05,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84d7bebe/2f9e8229d94143be96f06a29897917cb/FLAG13426d9a2 [2022-07-12 08:53:05,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84d7bebe/2f9e8229d94143be96f06a29897917cb [2022-07-12 08:53:05,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 08:53:05,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 08:53:05,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 08:53:05,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 08:53:05,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 08:53:05,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:53:05" (1/1) ... [2022-07-12 08:53:05,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b253ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:05, skipping insertion in model container [2022-07-12 08:53:05,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:53:05" (1/1) ... [2022-07-12 08:53:05,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 08:53:05,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 08:53:06,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i[1224,1237] [2022-07-12 08:53:06,062 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i[2827,2840] [2022-07-12 08:53:06,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:53:06,107 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 08:53:06,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i[1224,1237] [2022-07-12 08:53:06,144 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_1.i[2827,2840] [2022-07-12 08:53:06,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:53:06,164 INFO L208 MainTranslator]: Completed translation [2022-07-12 08:53:06,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06 WrapperNode [2022-07-12 08:53:06,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 08:53:06,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 08:53:06,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 08:53:06,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 08:53:06,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,211 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2022-07-12 08:53:06,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 08:53:06,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 08:53:06,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 08:53:06,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 08:53:06,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 08:53:06,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 08:53:06,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 08:53:06,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 08:53:06,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (1/1) ... [2022-07-12 08:53:06,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:53:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:53:06,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 08:53:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 08:53:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 08:53:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 08:53:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-12 08:53:06,336 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-12 08:53:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-12 08:53:06,336 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-12 08:53:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 08:53:06,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 08:53:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 08:53:06,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 08:53:06,402 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 08:53:06,403 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 08:53:15,021 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 08:53:15,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 08:53:15,027 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 08:53:15,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:53:15 BoogieIcfgContainer [2022-07-12 08:53:15,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 08:53:15,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 08:53:15,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 08:53:15,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 08:53:15,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 08:53:05" (1/3) ... [2022-07-12 08:53:15,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21627be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:53:15, skipping insertion in model container [2022-07-12 08:53:15,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:53:06" (2/3) ... [2022-07-12 08:53:15,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21627be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:53:15, skipping insertion in model container [2022-07-12 08:53:15,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:53:15" (3/3) ... [2022-07-12 08:53:15,053 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_1.i [2022-07-12 08:53:15,066 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 08:53:15,066 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 08:53:15,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 08:53:15,114 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@712ec2b7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@fb9f253 [2022-07-12 08:53:15,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 08:53:15,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 08:53:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:53:15,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:15,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:15,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:15,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-07-12 08:53:15,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 08:53:15,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133663229] [2022-07-12 08:53:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:15,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 08:53:15,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 08:53:15,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 08:53:15,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 08:53:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:53:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 08:53:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:53:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:15,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 08:53:15,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 08:53:15,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133663229] [2022-07-12 08:53:15,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133663229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:53:15,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:53:15,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 08:53:15,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416196794] [2022-07-12 08:53:15,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:53:15,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 08:53:15,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 08:53:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 08:53:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:15,356 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:15,453 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-07-12 08:53:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 08:53:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 08:53:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:15,462 INFO L225 Difference]: With dead ends: 93 [2022-07-12 08:53:15,463 INFO L226 Difference]: Without dead ends: 43 [2022-07-12 08:53:15,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:15,471 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:15,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 08:53:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-12 08:53:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-07-12 08:53:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-12 08:53:15,521 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-07-12 08:53:15,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:15,521 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-12 08:53:15,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-12 08:53:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 08:53:15,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:15,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:15,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 08:53:15,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 08:53:15,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-07-12 08:53:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 08:53:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044856676] [2022-07-12 08:53:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:15,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 08:53:15,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 08:53:15,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 08:53:15,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 08:53:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:53:15,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 08:53:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:53:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:15,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 08:53:15,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 08:53:15,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044856676] [2022-07-12 08:53:15,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044856676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:53:15,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:53:15,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 08:53:15,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013121487] [2022-07-12 08:53:15,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:53:15,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 08:53:15,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 08:53:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 08:53:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:15,901 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:15,984 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-07-12 08:53:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 08:53:15,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 08:53:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:15,993 INFO L225 Difference]: With dead ends: 52 [2022-07-12 08:53:15,993 INFO L226 Difference]: Without dead ends: 38 [2022-07-12 08:53:15,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:15,994 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:15,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 08:53:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-12 08:53:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-12 08:53:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-07-12 08:53:16,007 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-07-12 08:53:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:16,008 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-07-12 08:53:16,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-07-12 08:53:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 08:53:16,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:16,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:16,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 08:53:16,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 08:53:16,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:16,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:16,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-07-12 08:53:16,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 08:53:16,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129489358] [2022-07-12 08:53:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:16,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 08:53:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 08:53:16,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 08:53:16,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 08:53:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:53:16,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 08:53:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:53:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:16,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 08:53:16,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 08:53:16,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129489358] [2022-07-12 08:53:16,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129489358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:53:16,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:53:16,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 08:53:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814910009] [2022-07-12 08:53:16,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:53:16,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 08:53:16,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 08:53:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 08:53:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:16,548 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:16,641 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-12 08:53:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 08:53:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-12 08:53:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:16,643 INFO L225 Difference]: With dead ends: 53 [2022-07-12 08:53:16,643 INFO L226 Difference]: Without dead ends: 40 [2022-07-12 08:53:16,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 08:53:16,644 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:16,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 08:53:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-12 08:53:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-12 08:53:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-07-12 08:53:16,650 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2022-07-12 08:53:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:16,651 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-07-12 08:53:16,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-07-12 08:53:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 08:53:16,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:16,652 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:16,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 08:53:16,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 08:53:16,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:16,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2022-07-12 08:53:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 08:53:16,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545473437] [2022-07-12 08:53:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:53:16,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 08:53:16,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 08:53:16,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 08:53:16,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 08:53:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:53:16,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 08:53:16,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:53:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:17,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:53:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:17,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 08:53:17,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545473437] [2022-07-12 08:53:17,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545473437] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:53:17,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:53:17,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-12 08:53:17,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291949469] [2022-07-12 08:53:17,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:53:17,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 08:53:17,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 08:53:17,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 08:53:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 08:53:17,586 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:53:17,814 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2022-07-12 08:53:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 08:53:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-12 08:53:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:53:17,820 INFO L225 Difference]: With dead ends: 57 [2022-07-12 08:53:17,820 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 08:53:17,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 08:53:17,822 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 08:53:17,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 08:53:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 08:53:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-12 08:53:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:53:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-07-12 08:53:17,830 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2022-07-12 08:53:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:53:17,831 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-07-12 08:53:17,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-07-12 08:53:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 08:53:17,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:53:17,832 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:53:17,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-12 08:53:18,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 08:53:18,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:53:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:53:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2022-07-12 08:53:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 08:53:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103898733] [2022-07-12 08:53:18,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 08:53:18,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 08:53:18,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 08:53:18,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 08:53:18,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 08:53:18,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 08:53:18,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 08:53:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 08:53:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:53:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 08:53:19,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:53:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 08:53:28,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 08:53:28,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103898733] [2022-07-12 08:53:28,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103898733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:53:28,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:53:28,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-12 08:53:28,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777668553] [2022-07-12 08:53:28,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:53:28,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 08:53:28,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 08:53:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 08:53:28,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-12 08:53:28,264 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:53:45,844 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:54:05,202 WARN L233 SmtUtils]: Spent 10.65s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:54:26,433 WARN L233 SmtUtils]: Spent 12.65s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:54:30,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 08:54:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:54:31,894 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2022-07-12 08:54:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 08:54:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-12 08:54:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:54:31,930 INFO L225 Difference]: With dead ends: 68 [2022-07-12 08:54:31,930 INFO L226 Difference]: Without dead ends: 65 [2022-07-12 08:54:31,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=118, Invalid=531, Unknown=1, NotChecked=0, Total=650 [2022-07-12 08:54:31,931 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-07-12 08:54:31,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 345 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-07-12 08:54:31,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-12 08:54:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-07-12 08:54:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 08:54:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-12 08:54:31,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 21 [2022-07-12 08:54:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:54:31,948 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-12 08:54:31,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:54:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-12 08:54:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 08:54:31,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:54:31,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:54:31,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 08:54:32,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 08:54:32,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:54:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:54:32,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-07-12 08:54:32,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 08:54:32,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796167680] [2022-07-12 08:54:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:54:32,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 08:54:32,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 08:54:32,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 08:54:32,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process