./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_3_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_5.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 41039e1ca02f0c1a8ce2142160f9ec0f4ca3178e082edea8dc4d2cb9edc06efd --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:06:57,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:06:57,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:06:57,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:06:57,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:06:57,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:06:57,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:06:57,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:06:57,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:06:57,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:06:57,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:06:57,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:06:57,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:06:57,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:06:57,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:06:57,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:06:57,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:06:57,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:06:57,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:06:57,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:06:57,424 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:06:57,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:06:57,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:06:57,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:06:57,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:06:57,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:06:57,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:06:57,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:06:57,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:06:57,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:06:57,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:06:57,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:06:57,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:06:57,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:06:57,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:06:57,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:06:57,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:06:57,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:06:57,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:06:57,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:06:57,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:06:57,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:06:57,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:06:57,477 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:06:57,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:06:57,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:06:57,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:06:57,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:06:57,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:06:57,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:06:57,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:06:57,480 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:06:57,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:06:57,481 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:06:57,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:06:57,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:06:57,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:06:57,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:06:57,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:06:57,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:06:57,483 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:06:57,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:06:57,483 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:06:57,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:06:57,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:06:57,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:06:57,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:06:57,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:06:57,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:06:57,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:06:57,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:06:57,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:06:57,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:06:57,485 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:06:57,486 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:06:57,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:06:57,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41039e1ca02f0c1a8ce2142160f9ec0f4ca3178e082edea8dc4d2cb9edc06efd [2022-07-22 20:06:57,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:06:57,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:06:57,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:06:57,783 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:06:57,783 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:06:57,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_3_5.i [2022-07-22 20:06:57,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043bb812c/46ec237e28cc4e83807f80a97454b997/FLAG9c4412bef [2022-07-22 20:06:58,267 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:06:58,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_5.i [2022-07-22 20:06:58,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043bb812c/46ec237e28cc4e83807f80a97454b997/FLAG9c4412bef [2022-07-22 20:06:58,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043bb812c/46ec237e28cc4e83807f80a97454b997 [2022-07-22 20:06:58,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:06:58,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:06:58,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:06:58,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:06:58,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:06:58,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3125fa1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58, skipping insertion in model container [2022-07-22 20:06:58,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:06:58,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:06:58,476 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_5.i[1226,1239] [2022-07-22 20:06:58,494 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_5.i[2862,2875] [2022-07-22 20:06:58,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:06:58,502 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:06:58,516 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_5.i[1226,1239] [2022-07-22 20:06:58,528 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_5.i[2862,2875] [2022-07-22 20:06:58,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:06:58,541 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:06:58,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58 WrapperNode [2022-07-22 20:06:58,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:06:58,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:06:58,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:06:58,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:06:58,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,572 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2022-07-22 20:06:58,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:06:58,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:06:58,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:06:58,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:06:58,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:06:58,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:06:58,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:06:58,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:06:58,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (1/1) ... [2022-07-22 20:06:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:06:58,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:06:58,658 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) [2022-07-22 20:06:58,683 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 [2022-07-22 20:06:58,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:06:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-22 20:06:58,706 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-22 20:06:58,706 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-22 20:06:58,710 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-22 20:06:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:06:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:06:58,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:06:58,774 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:06:58,777 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:06:58,981 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:06:58,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:06:58,986 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 20:06:58,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:06:58 BoogieIcfgContainer [2022-07-22 20:06:58,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:06:58,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:06:58,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:06:58,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:06:58,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:06:58" (1/3) ... [2022-07-22 20:06:58,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df0666b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:06:58, skipping insertion in model container [2022-07-22 20:06:58,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:06:58" (2/3) ... [2022-07-22 20:06:58,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df0666b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:06:58, skipping insertion in model container [2022-07-22 20:06:58,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:06:58" (3/3) ... [2022-07-22 20:06:58,994 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_5.i [2022-07-22 20:06:59,022 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:06:59,022 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:06:59,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:06:59,114 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@7ace632, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@28040a52 [2022-07-22 20:06:59,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:06:59,124 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) [2022-07-22 20:06:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 20:06:59,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:06:59,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:06:59,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:06:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:06:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-22 20:06:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:06:59,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661107320] [2022-07-22 20:06:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:06:59,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:06:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:06:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:06:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:06:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661107320] [2022-07-22 20:06:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661107320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:06:59,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:06:59,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 20:06:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052934688] [2022-07-22 20:06:59,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:06:59,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 20:06:59,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:06:59,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 20:06:59,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 20:06:59,423 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) [2022-07-22 20:06:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:06:59,483 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-07-22 20:06:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 20:06:59,486 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 [2022-07-22 20:06:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:06:59,491 INFO L225 Difference]: With dead ends: 96 [2022-07-22 20:06:59,491 INFO L226 Difference]: Without dead ends: 39 [2022-07-22 20:06:59,493 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 [2022-07-22 20:06:59,496 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 [2022-07-22 20:06:59,497 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] [2022-07-22 20:06:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-22 20:06:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-07-22 20:06:59,520 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) [2022-07-22 20:06:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-22 20:06:59,522 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-07-22 20:06:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:06:59,523 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-22 20:06:59,523 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) [2022-07-22 20:06:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-22 20:06:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 20:06:59,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:06:59,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:06:59,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:06:59,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:06:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:06:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-22 20:06:59,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:06:59,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274270713] [2022-07-22 20:06:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:06:59,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:06:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:06:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:06:59,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:06:59,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274270713] [2022-07-22 20:06:59,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274270713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:06:59,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:06:59,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:06:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320307698] [2022-07-22 20:06:59,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:06:59,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:06:59,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:06:59,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:06:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:06:59,592 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) [2022-07-22 20:06:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:06:59,649 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-22 20:06:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:06:59,649 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 [2022-07-22 20:06:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:06:59,650 INFO L225 Difference]: With dead ends: 39 [2022-07-22 20:06:59,650 INFO L226 Difference]: Without dead ends: 33 [2022-07-22 20:06:59,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:06:59,652 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 [2022-07-22 20:06:59,653 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] [2022-07-22 20:06:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-22 20:06:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-22 20:06:59,657 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) [2022-07-22 20:06:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-07-22 20:06:59,659 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-07-22 20:06:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:06:59,659 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-07-22 20:06:59,659 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) [2022-07-22 20:06:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-07-22 20:06:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 20:06:59,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:06:59,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:06:59,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:06:59,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:06:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:06:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-22 20:06:59,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:06:59,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043805377] [2022-07-22 20:06:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:06:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:06:59,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:06:59,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856031362] [2022-07-22 20:06:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:06:59,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:06:59,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:06:59,677 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) [2022-07-22 20:06:59,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:06:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:06:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 20:06:59,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:07:19,850 WARN L233 SmtUtils]: Spent 17.26s 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) [2022-07-22 20:07:40,830 WARN L233 SmtUtils]: Spent 11.53s 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) [2022-07-22 20:08:07,447 WARN L233 SmtUtils]: Spent 17.36s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:08:32,625 WARN L233 SmtUtils]: Spent 11.57s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:08:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:08:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:08:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:08:44,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:08:44,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043805377] [2022-07-22 20:08:44,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:08:44,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856031362] [2022-07-22 20:08:44,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856031362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:08:44,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:08:44,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-22 20:08:44,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562194820] [2022-07-22 20:08:44,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:08:44,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 20:08:44,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:08:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 20:08:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=200, Unknown=18, NotChecked=0, Total=272 [2022-07-22 20:08:44,799 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) [2022-07-22 20:08:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:08:45,096 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-22 20:08:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:08:45,097 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 [2022-07-22 20:08:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:08:45,098 INFO L225 Difference]: With dead ends: 41 [2022-07-22 20:08:45,098 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 20:08:45,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 101.9s TimeCoverageRelationStatistics Valid=63, Invalid=225, Unknown=18, NotChecked=0, Total=306 [2022-07-22 20:08:45,099 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 [2022-07-22 20:08:45,100 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] [2022-07-22 20:08:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 20:08:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-07-22 20:08:45,104 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) [2022-07-22 20:08:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-22 20:08:45,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-07-22 20:08:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:08:45,106 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-22 20:08:45,106 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) [2022-07-22 20:08:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-22 20:08:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 20:08:45,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:08:45,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:08:45,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 20:08:45,307 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 [2022-07-22 20:08:45,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:08:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:08:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 20667420, now seen corresponding path program 1 times [2022-07-22 20:08:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:08:45,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092444073] [2022-07-22 20:08:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:08:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:08:45,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:08:45,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588943065] [2022-07-22 20:08:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:08:45,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:08:45,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:08:45,330 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) [2022-07-22 20:08:45,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 20:08:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:08:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 20:08:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:09:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:09:02,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:09:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:09:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:09:09,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092444073] [2022-07-22 20:09:09,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:09:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588943065] [2022-07-22 20:09:09,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588943065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:09:09,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:09:09,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-07-22 20:09:09,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185338760] [2022-07-22 20:09:09,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:09:09,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 20:09:09,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:09:09,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 20:09:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=179, Unknown=8, NotChecked=0, Total=240 [2022-07-22 20:09:09,656 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) [2022-07-22 20:09:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:09:10,226 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-07-22 20:09:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:09:10,227 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 [2022-07-22 20:09:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:09:10,228 INFO L225 Difference]: With dead ends: 46 [2022-07-22 20:09:10,228 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 20:09:10,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=62, Invalid=202, Unknown=8, NotChecked=0, Total=272 [2022-07-22 20:09:10,229 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 [2022-07-22 20:09:10,230 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] [2022-07-22 20:09:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 20:09:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-22 20:09:10,235 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) [2022-07-22 20:09:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-07-22 20:09:10,236 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-07-22 20:09:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:09:10,236 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-07-22 20:09:10,236 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) [2022-07-22 20:09:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-07-22 20:09:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 20:09:10,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:09:10,237 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:09:10,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:09:10,443 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 [2022-07-22 20:09:10,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:09:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:09:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2022-07-22 20:09:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:09:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864718526] [2022-07-22 20:09:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:09:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:09:10,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:09:10,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055086009] [2022-07-22 20:09:10,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 20:09:10,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:09:10,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:09:10,455 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) [2022-07-22 20:09:10,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:09:10,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 20:09:10,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:09:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 20:09:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:09:30,846 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse3 (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse2 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse0 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse2)) (.cse1 (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse0 256)) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse1) 256) 127) (not (<= (mod (+ .cse0 (* 255 .cse2)) 256) 127)) (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (<= .cse2 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse1 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|))))) .cse3) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse6 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse4 (+ (- 256) .cse6))) (let ((.cse5 (mod .cse4 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse4) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (= .cse5 0) (= (mod .cse5 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse6 127))))))) .cse3) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int)) (let ((.cse8 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse7 (mod (+ (- 256) .cse8) |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse7 0)) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7) 256) 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse7 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) 256))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (and (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| (+ (- 256) (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|))) (<= (mod .cse7 256) 127) (not (<= .cse8 127)))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int)) (let ((.cse12 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse9 (mod (+ (- 256) .cse12) |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse9 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse11 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse10 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| (+ (- 256) .cse11)))) (and (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (not (<= (mod (+ .cse10 (* 255 .cse11)) 256) 127)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse10 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|))))) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9) 256) 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse9 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) 256))) (<= (mod .cse9 256) 127) (not (<= .cse12 127))))))) .cse3) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse15 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse13 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse15)) (.cse14 (mod .cse15 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse13 256)) (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse14) 256) 127) (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (<= .cse15 127) (not (<= (mod (+ .cse13 .cse15) 256) 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse14 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|))))) .cse3) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse18 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse17 (+ (- 256) .cse18))) (let ((.cse16 (mod .cse17 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (not (<= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse16) 256) 127)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse17) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (= |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse16 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) 256))) (not (<= .cse18 127))))))) .cse3) (and .cse3 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse20 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse22 (+ (- 256) .cse20))) (let ((.cse19 (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse22)) (.cse21 (mod .cse22 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (< |v_ULTIMATE.start_gcd_test_~a#1_15| 0)) (not (<= (mod (+ .cse19 (* 255 .cse20)) 256) 127)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod .cse19 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (= .cse21 0) (= (mod .cse21 256) |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse20 127)))))))))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-07-22 20:10:09,149 WARN L233 SmtUtils]: Spent 15.72s on a formula simplification. DAG size of input: 81 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:10:24,882 WARN L233 SmtUtils]: Spent 5.71s 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) [2022-07-22 20:10:54,455 WARN L233 SmtUtils]: Spent 7.90s 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) [2022-07-22 20:10:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-22 20:10:58,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:11:24,672 WARN L855 $PredicateComparison]: unable to prove that (or (not (< 0 |c_ULTIMATE.start_main1_~x~0#1|)) (let ((.cse20 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse22 (mod (+ .cse20 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse23 (mod (+ .cse20 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse21 (mod .cse20 256)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse14 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse17 (<= .cse23 127)) (.cse7 (<= .cse22 127))) (let ((.cse5 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256) 0))) (.cse8 (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse2 (not .cse7)) (.cse9 (not .cse17)) (.cse0 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256) 0))) (.cse3 (not .cse14)) (.cse4 (<= .cse22 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse1 (not .cse6)) (.cse10 (<= .cse21 127))) (and (or (and (or .cse0 .cse1 .cse2 .cse3 .cse4) (or (and (or .cse5 .cse6 .cse7 .cse3 .cse8) (or .cse2 (and (or .cse0 .cse1 .cse3 .cse4) (or .cse5 .cse6 .cse3 .cse8)))) .cse9)) .cse10) (or (let ((.cse15 (<= .cse21 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256) 0)))) (let ((.cse18 (or .cse14 .cse15 .cse16)) (.cse19 (= .cse20 0))) (let ((.cse13 (or .cse14 .cse1 .cse15 .cse16)) (.cse12 (or .cse1 (and .cse18 (or .cse0 .cse19 .cse3 .cse4))))) (and (or (let ((.cse11 (or .cse14 .cse15 .cse6 .cse16))) (and (or (and .cse11 .cse12) .cse2) (or (and .cse13 .cse11) .cse7))) .cse17) (or (and (or .cse7 (and .cse13 (or .cse6 (and .cse18 (or .cse19 .cse5 .cse3 .cse8))))) (or (and (or .cse6 (and .cse18 (or .cse5 .cse3 .cse8))) .cse12) .cse2)) .cse9))))) (not .cse10))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true