./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_3_4.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_3+newton_3_4.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 cdcc8697c8b9bd3a25c95b335058fb611b45ef6a0bd08057dccc283c9b370e3d --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 08:49:09,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 08:49:09,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 08:49:09,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 08:49:09,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 08:49:09,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 08:49:09,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 08:49:09,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 08:49:09,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 08:49:09,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 08:49:09,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 08:49:09,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 08:49:09,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 08:49:09,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 08:49:09,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 08:49:09,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 08:49:09,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 08:49:09,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 08:49:09,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 08:49:09,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 08:49:09,231 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 08:49:09,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 08:49:09,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 08:49:09,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 08:49:09,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 08:49:09,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 08:49:09,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 08:49:09,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 08:49:09,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 08:49:09,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 08:49:09,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 08:49:09,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 08:49:09,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 08:49:09,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 08:49:09,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 08:49:09,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 08:49:09,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 08:49:09,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 08:49:09,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 08:49:09,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 08:49:09,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 08:49:09,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 08:49:09,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 08:49:09,265 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 08:49:09,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 08:49:09,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 08:49:09,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 08:49:09,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 08:49:09,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 08:49:09,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 08:49:09,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 08:49:09,268 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 08:49:09,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 08:49:09,269 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 08:49:09,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 08:49:09,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 08:49:09,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 08:49:09,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 08:49:09,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 08:49:09,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 08:49:09,270 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 08:49:09,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 08:49:09,271 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 08:49:09,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 08:49:09,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 08:49:09,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 08:49:09,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 08:49:09,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:49:09,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 08:49:09,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 08:49:09,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 08:49:09,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 08:49:09,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 08:49:09,273 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 08:49:09,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 08:49:09,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 08:49:09,274 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdcc8697c8b9bd3a25c95b335058fb611b45ef6a0bd08057dccc283c9b370e3d [2022-07-12 08:49:09,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 08:49:09,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 08:49:09,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 08:49:09,550 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 08:49:09,552 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 08:49:09,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_3_4.i [2022-07-12 08:49:09,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40459b8dd/56dc2f9ee18d4420ab833226249d062f/FLAGf6eb81441 [2022-07-12 08:49:10,007 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 08:49:10,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_4.i [2022-07-12 08:49:10,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40459b8dd/56dc2f9ee18d4420ab833226249d062f/FLAGf6eb81441 [2022-07-12 08:49:10,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40459b8dd/56dc2f9ee18d4420ab833226249d062f [2022-07-12 08:49:10,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 08:49:10,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 08:49:10,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 08:49:10,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 08:49:10,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 08:49:10,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a9d03f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10, skipping insertion in model container [2022-07-12 08:49:10,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 08:49:10,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 08:49:10,594 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_3+newton_3_4.i[1226,1239] [2022-07-12 08:49:10,614 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_3+newton_3_4.i[2862,2875] [2022-07-12 08:49:10,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:49:10,622 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 08:49:10,633 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_3+newton_3_4.i[1226,1239] [2022-07-12 08:49:10,642 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_3+newton_3_4.i[2862,2875] [2022-07-12 08:49:10,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:49:10,654 INFO L208 MainTranslator]: Completed translation [2022-07-12 08:49:10,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10 WrapperNode [2022-07-12 08:49:10,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 08:49:10,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 08:49:10,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 08:49:10,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 08:49:10,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,690 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2022-07-12 08:49:10,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 08:49:10,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 08:49:10,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 08:49:10,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 08:49:10,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 08:49:10,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 08:49:10,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 08:49:10,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 08:49:10,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (1/1) ... [2022-07-12 08:49:10,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:49:10,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:49:10,754 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 08:49:10,767 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 08:49:10,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 08:49:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-12 08:49:10,785 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-12 08:49:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-12 08:49:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-12 08:49:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 08:49:10,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 08:49:10,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 08:49:10,839 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 08:49:10,840 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 08:49:10,986 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 08:49:10,992 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 08:49:10,992 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 08:49:10,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:49:10 BoogieIcfgContainer [2022-07-12 08:49:10,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 08:49:10,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 08:49:10,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 08:49:10,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 08:49:10,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 08:49:10" (1/3) ... [2022-07-12 08:49:10,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac5c2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:49:10, skipping insertion in model container [2022-07-12 08:49:11,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:49:10" (2/3) ... [2022-07-12 08:49:11,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac5c2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:49:11, skipping insertion in model container [2022-07-12 08:49:11,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:49:10" (3/3) ... [2022-07-12 08:49:11,001 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_4.i [2022-07-12 08:49:11,013 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 08:49:11,013 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 08:49:11,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 08:49:11,073 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@52ad5019, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@29d49d4e [2022-07-12 08:49:11,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 08:49:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:49:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:49:11,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:49:11,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:49:11,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:49:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:49:11,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-12 08:49:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:49:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923173784] [2022-07-12 08:49:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:49:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:49:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:49:11,278 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 08:49:11,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:49:11,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923173784] [2022-07-12 08:49:11,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923173784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:49:11,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:49:11,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 08:49:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493715832] [2022-07-12 08:49:11,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:49:11,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 08:49:11,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:49:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 08:49:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 08:49:11,311 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:49:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:49:11,358 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-07-12 08:49:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 08:49:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 08:49:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:49:11,366 INFO L225 Difference]: With dead ends: 96 [2022-07-12 08:49:11,366 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 08:49:11,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 08:49:11,372 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:49:11,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:49:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 08:49:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-07-12 08:49:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:49:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-12 08:49:11,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-07-12 08:49:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:49:11,409 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-12 08:49:11,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:49:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-12 08:49:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:49:11,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:49:11,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:49:11,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 08:49:11,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:49:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:49:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-12 08:49:11,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:49:11,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881687838] [2022-07-12 08:49:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:49:11,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:49:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:49:11,540 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 08:49:11,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:49:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881687838] [2022-07-12 08:49:11,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881687838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:49:11,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:49:11,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 08:49:11,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968255905] [2022-07-12 08:49:11,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:49:11,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 08:49:11,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:49:11,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 08:49:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 08:49:11,571 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:49:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:49:11,659 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-12 08:49:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 08:49:11,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 08:49:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:49:11,662 INFO L225 Difference]: With dead ends: 39 [2022-07-12 08:49:11,662 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 08:49:11,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 08:49:11,666 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:49:11,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:49:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 08:49:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-12 08:49:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:49:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-07-12 08:49:11,682 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-07-12 08:49:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:49:11,685 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-07-12 08:49:11,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:49:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-07-12 08:49:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 08:49:11,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:49:11,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:49:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 08:49:11,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:49:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:49:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-12 08:49:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:49:11,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966921555] [2022-07-12 08:49:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:49:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:49:11,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:49:11,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641605595] [2022-07-12 08:49:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:49:11,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:49:11,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:49:11,712 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 08:49:11,714 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 08:49:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:49:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 08:49:11,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:49:33,116 WARN L233 SmtUtils]: Spent 18.47s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:49:50,717 WARN L233 SmtUtils]: Spent 8.97s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:50:15,003 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 08:50:15,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:50:27,304 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 08:50:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:50:27,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966921555] [2022-07-12 08:50:27,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:50:27,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641605595] [2022-07-12 08:50:27,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641605595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:50:27,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:50:27,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-12 08:50:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268762083] [2022-07-12 08:50:27,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:50:27,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 08:50:27,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:50:27,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 08:50:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=202, Unknown=16, NotChecked=0, Total=272 [2022-07-12 08:50:27,307 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:50:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:50:27,515 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-12 08:50:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 08:50:27,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 08:50:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:50:27,517 INFO L225 Difference]: With dead ends: 41 [2022-07-12 08:50:27,517 INFO L226 Difference]: Without dead ends: 35 [2022-07-12 08:50:27,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=63, Invalid=227, Unknown=16, NotChecked=0, Total=306 [2022-07-12 08:50:27,519 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:50:27,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-12 08:50:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-12 08:50:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-07-12 08:50:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:50:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-12 08:50:27,524 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-07-12 08:50:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:50:27,524 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-12 08:50:27,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:50:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-12 08:50:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 08:50:27,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:50:27,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:50:27,546 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 08:50:27,739 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 08:50:27,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:50:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:50:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash 20667420, now seen corresponding path program 1 times [2022-07-12 08:50:27,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:50:27,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126471096] [2022-07-12 08:50:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:50:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:50:27,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:50:27,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622893259] [2022-07-12 08:50:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:50:27,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:50:27,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:50:27,752 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 08:50:27,777 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 08:50:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:50:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 08:50:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:50:44,422 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 08:50:44,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:50:55,796 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 08:50:55,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:50:55,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126471096] [2022-07-12 08:50:55,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:50:55,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622893259] [2022-07-12 08:50:55,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622893259] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:50:55,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:50:55,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-07-12 08:50:55,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340797529] [2022-07-12 08:50:55,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:50:55,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 08:50:55,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:50:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 08:50:55,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=177, Unknown=10, NotChecked=0, Total=240 [2022-07-12 08:50:55,798 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:50:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:50:56,451 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-07-12 08:50:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 08:50:56,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 08:50:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:50:56,452 INFO L225 Difference]: With dead ends: 46 [2022-07-12 08:50:56,453 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 08:50:56,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=62, Invalid=200, Unknown=10, NotChecked=0, Total=272 [2022-07-12 08:50:56,454 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 08:50:56,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 281 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-07-12 08:50:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 08:50:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-12 08:50:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:50:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-07-12 08:50:56,459 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-07-12 08:50:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:50:56,460 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-07-12 08:50:56,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:50:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-07-12 08:50:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 08:50:56,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:50:56,461 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:50:56,483 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 08:50:56,661 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 08:50:56,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:50:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:50:56,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2022-07-12 08:50:56,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:50:56,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159416261] [2022-07-12 08:50:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:50:56,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:50:56,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:50:56,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889027041] [2022-07-12 08:50:56,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 08:50:56,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:50:56,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:50:56,680 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 08:50:56,681 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 08:50:56,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 08:50:56,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 08:50:56,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 08:50:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:51:51,665 WARN L233 SmtUtils]: Spent 27.22s on a formula simplification. DAG size of input: 92 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:52:20,233 WARN L233 SmtUtils]: Spent 11.37s on a formula simplification. DAG size of input: 73 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:52:41,175 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:53:10,722 WARN L233 SmtUtils]: Spent 9.05s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:53:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:53:18,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:53:41,400 WARN L855 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse20 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ .cse20 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse23 (mod (+ .cse20 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse21 (<= .cse23 127)) (.cse19 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse10 (<= .cse24 127)) (.cse18 (mod .cse20 256))) (let ((.cse0 (<= .cse18 127)) (.cse9 (not .cse10)) (.cse3 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256) 0))) (.cse1 (not .cse6)) (.cse5 (<= .cse24 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse7 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256) 0))) (.cse4 (not .cse19)) (.cse8 (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse13 (not .cse21))) (and (or (not .cse0) (let ((.cse12 (= .cse20 0))) (let ((.cse15 (<= .cse18 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse16 (and .cse19 (not .cse12))) (.cse17 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256) 0)))) (let ((.cse11 (or .cse1 .cse15 .cse16 .cse17)) (.cse14 (or .cse15 .cse16 .cse6 .cse17)) (.cse2 (or .cse15 .cse16 .cse17))) (and (or (and (or (and (or .cse1 (and .cse2 (or .cse3 .cse4 .cse5))) (or .cse6 (and .cse2 (or .cse7 .cse4 .cse8)))) .cse9) (or .cse10 (and .cse11 (or .cse6 (and .cse2 (or .cse12 .cse7 .cse4 .cse8)))))) .cse13) (or (and .cse11 .cse14) .cse10) (or (and .cse14 (or .cse1 (and .cse2 (or .cse3 .cse12 .cse4 .cse5)))) .cse9)))))) (or .cse0 (and (or .cse3 .cse1 .cse21 .cse9 .cse4 .cse5) (or (let ((.cse22 (or .cse7 .cse6 .cse4 .cse8))) (and (or .cse9 (and (or .cse3 .cse1 .cse4 .cse5) .cse22)) .cse22)) .cse13)))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true