./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_2+newton_2_7.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_2+newton_2_7.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 5f340d35cff17443f161c05142ff32471e0b069a47814c4e28ff520efea1035b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 08:39:54,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 08:39:54,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 08:39:54,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 08:39:54,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 08:39:54,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 08:39:54,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 08:39:54,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 08:39:54,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 08:39:54,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 08:39:54,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 08:39:54,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 08:39:54,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 08:39:54,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 08:39:54,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 08:39:54,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 08:39:54,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 08:39:54,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 08:39:54,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 08:39:54,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 08:39:54,200 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 08:39:54,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 08:39:54,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 08:39:54,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 08:39:54,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 08:39:54,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 08:39:54,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 08:39:54,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 08:39:54,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 08:39:54,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 08:39:54,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 08:39:54,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 08:39:54,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 08:39:54,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 08:39:54,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 08:39:54,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 08:39:54,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 08:39:54,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 08:39:54,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 08:39:54,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 08:39:54,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 08:39:54,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 08:39:54,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 08:39:54,234 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 08:39:54,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 08:39:54,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 08:39:54,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 08:39:54,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 08:39:54,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 08:39:54,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 08:39:54,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 08:39:54,240 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 08:39:54,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 08:39:54,241 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 08:39:54,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 08:39:54,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 08:39:54,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 08:39:54,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 08:39:54,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 08:39:54,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 08:39:54,242 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 08:39:54,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 08:39:54,243 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 08:39:54,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 08:39:54,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 08:39:54,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 08:39:54,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 08:39:54,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:39:54,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 08:39:54,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 08:39:54,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 08:39:54,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 08:39:54,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 08:39:54,245 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 08:39:54,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 08:39:54,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 08:39:54,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f340d35cff17443f161c05142ff32471e0b069a47814c4e28ff520efea1035b [2022-07-12 08:39:54,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 08:39:54,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 08:39:54,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 08:39:54,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 08:39:54,450 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 08:39:54,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_2+newton_2_7.i [2022-07-12 08:39:54,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe893a45/74d7155d087f4242990974371446db5c/FLAGa2676e1dd [2022-07-12 08:39:54,818 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 08:39:54,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_2+newton_2_7.i [2022-07-12 08:39:54,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe893a45/74d7155d087f4242990974371446db5c/FLAGa2676e1dd [2022-07-12 08:39:55,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe893a45/74d7155d087f4242990974371446db5c [2022-07-12 08:39:55,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 08:39:55,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 08:39:55,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 08:39:55,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 08:39:55,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 08:39:55,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3606e3c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55, skipping insertion in model container [2022-07-12 08:39:55,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 08:39:55,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 08:39:55,410 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_2+newton_2_7.i[1226,1239] [2022-07-12 08:39:55,427 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_2+newton_2_7.i[2841,2854] [2022-07-12 08:39:55,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:39:55,434 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 08:39:55,441 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_2+newton_2_7.i[1226,1239] [2022-07-12 08:39:55,448 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_2+newton_2_7.i[2841,2854] [2022-07-12 08:39:55,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:39:55,457 INFO L208 MainTranslator]: Completed translation [2022-07-12 08:39:55,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55 WrapperNode [2022-07-12 08:39:55,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 08:39:55,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 08:39:55,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 08:39:55,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 08:39:55,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,491 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-07-12 08:39:55,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 08:39:55,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 08:39:55,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 08:39:55,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 08:39:55,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 08:39:55,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 08:39:55,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 08:39:55,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 08:39:55,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (1/1) ... [2022-07-12 08:39:55,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:39:55,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:39:55,556 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 08:39:55,583 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 08:39:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 08:39:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-12 08:39:55,592 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-12 08:39:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-12 08:39:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-12 08:39:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 08:39:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 08:39:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 08:39:55,640 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 08:39:55,641 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 08:39:55,741 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 08:39:55,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 08:39:55,745 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 08:39:55,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:39:55 BoogieIcfgContainer [2022-07-12 08:39:55,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 08:39:55,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 08:39:55,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 08:39:55,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 08:39:55,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 08:39:55" (1/3) ... [2022-07-12 08:39:55,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562cd8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:39:55, skipping insertion in model container [2022-07-12 08:39:55,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:39:55" (2/3) ... [2022-07-12 08:39:55,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562cd8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:39:55, skipping insertion in model container [2022-07-12 08:39:55,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:39:55" (3/3) ... [2022-07-12 08:39:55,763 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_7.i [2022-07-12 08:39:55,772 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 08:39:55,772 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 08:39:55,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 08:39:55,864 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@3daf8685, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@48ef8ef7 [2022-07-12 08:39:55,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 08:39:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 08:39:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:39:55,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:39:55,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:39:55,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:39:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:39:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-12 08:39:55,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:39:55,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135248282] [2022-07-12 08:39:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:39:55,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:39:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:39:56,098 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 08:39:56,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:39:56,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135248282] [2022-07-12 08:39:56,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135248282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:39:56,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:39:56,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 08:39:56,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237342377] [2022-07-12 08:39:56,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:39:56,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 08:39:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:39:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 08:39:56,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 08:39:56,163 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 08:39:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:39:56,253 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-07-12 08:39:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 08:39:56,255 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 08:39:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:39:56,260 INFO L225 Difference]: With dead ends: 90 [2022-07-12 08:39:56,260 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 08:39:56,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 08:39:56,265 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:39:56,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 107 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:39:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 08:39:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-12 08:39:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 08:39:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-12 08:39:56,291 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-07-12 08:39:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:39:56,292 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-12 08:39:56,292 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 08:39:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-12 08:39:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:39:56,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:39:56,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:39:56,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 08:39:56,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:39:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:39:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-07-12 08:39:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:39:56,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496309821] [2022-07-12 08:39:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:39:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:39:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:39:56,342 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 08:39:56,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:39:56,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496309821] [2022-07-12 08:39:56,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496309821] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:39:56,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:39:56,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 08:39:56,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885609139] [2022-07-12 08:39:56,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:39:56,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 08:39:56,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:39:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 08:39:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 08:39:56,348 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. 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 08:39:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:39:56,366 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-07-12 08:39:56,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 08:39:56,367 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 08:39:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:39:56,368 INFO L225 Difference]: With dead ends: 36 [2022-07-12 08:39:56,368 INFO L226 Difference]: Without dead ends: 30 [2022-07-12 08:39:56,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 08:39:56,369 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:39:56,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:39:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-12 08:39:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-12 08:39:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 08:39:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-12 08:39:56,375 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-07-12 08:39:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:39:56,377 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-12 08:39:56,377 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 08:39:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-12 08:39:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 08:39:56,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:39:56,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:39:56,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 08:39:56,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:39:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:39:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2022-07-12 08:39:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:39:56,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152583415] [2022-07-12 08:39:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:39:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:39:56,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:39:56,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583214775] [2022-07-12 08:39:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:39:56,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:39:56,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:39:56,401 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 08:39:56,403 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 08:39:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:39:56,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 08:39:56,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:39:56,542 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 08:39:56,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:39:56,589 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 08:39:56,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:39:56,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152583415] [2022-07-12 08:39:56,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:39:56,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583214775] [2022-07-12 08:39:56,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583214775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:39:56,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:39:56,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-12 08:39:56,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647778308] [2022-07-12 08:39:56,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:39:56,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 08:39:56,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:39:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 08:39:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 08:39:56,593 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 08:39:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:39:56,641 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-12 08:39:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 08:39:56,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 08:39:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:39:56,642 INFO L225 Difference]: With dead ends: 37 [2022-07-12 08:39:56,642 INFO L226 Difference]: Without dead ends: 31 [2022-07-12 08:39:56,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-12 08:39:56,644 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:39:56,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:39:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-12 08:39:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-12 08:39:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 08:39:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-07-12 08:39:56,648 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-07-12 08:39:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:39:56,648 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-07-12 08:39:56,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 08:39:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-07-12 08:39:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 08:39:56,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:39:56,649 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:39:56,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 08:39:56,869 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 08:39:56,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:39:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:39:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2022-07-12 08:39:56,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:39:56,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035058892] [2022-07-12 08:39:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:39:56,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:39:56,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:39:56,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674050435] [2022-07-12 08:39:56,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 08:39:56,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:39:56,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:39:56,896 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 08:39:56,921 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 08:39:56,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 08:39:56,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 08:39:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 08:39:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:40:04,213 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:40:30,027 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:40:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 08:40:30,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:40:40,200 WARN L855 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~y~0#1| 0) (let ((.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| 0))) (let ((.cse3 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse31 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse30 (mod .cse31 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse30) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod (+ .cse31 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (not (<= .cse30 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse30 |c_ULTIMATE.start_main1_~y~0#1|) (<= (mod (+ .cse31 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)))))) (.cse4 (not .cse0)) (.cse5 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse28 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse29 (mod .cse28 256))) (or (not (<= (mod (+ .cse28 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse29) 256) 0)) (not (<= (mod (+ .cse28 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (not (<= .cse29 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse29 |c_ULTIMATE.start_main1_~y~0#1|))))) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|))))) (and (or .cse0 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse2 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse1 (mod (+ .cse2 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (not (<= .cse1 127)) (<= .cse1 |c_ULTIMATE.start_main1_~y~0#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod .cse2 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse1) 256) 0)) (<= (mod (+ .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)))))) (or .cse0 .cse3) (or .cse4 (and .cse5 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse7 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse6 (mod (+ .cse7 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse6 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (not (<= .cse6 127)) (< 127 (mod (+ .cse7 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (< 127 (mod .cse7 256)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse6) 256) 0)))))))))) (or .cse4 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse9 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse8 (mod (+ .cse9 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse8 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse8 127)) (<= (mod .cse9 256) 127) (< 127 (mod (+ .cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse8) 256) 0))))))) (or .cse0 (and (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse10 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse11 (mod .cse10 256))) (or (not (<= (mod (+ .cse10 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse11) 256) 0)) (not (<= .cse11 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse11 |c_ULTIMATE.start_main1_~y~0#1|) (<= (mod (+ .cse10 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127))))) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|))) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse13 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 (mod (+ .cse13 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (not (<= .cse12 127)) (<= .cse12 |c_ULTIMATE.start_main1_~y~0#1|) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse12) 256) 0)) (not (<= (mod .cse13 256) 127)) (<= (mod (+ .cse13 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127) (= .cse13 0))))))))) (or .cse0 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse15 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse14 (mod .cse15 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse14) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= (mod (+ .cse15 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (<= (mod (+ .cse15 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (not (<= .cse14 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse14 |c_ULTIMATE.start_main1_~y~0#1|)))))) (or .cse4 .cse3) (or (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse17 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse16 (mod (+ .cse17 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (not (<= .cse16 127)) (<= .cse16 |c_ULTIMATE.start_main1_~y~0#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod .cse17 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse16) 256) 0)) (< 127 (mod (+ .cse17 |c_ULTIMATE.start_gcd_test_~b#1|) 256)))))) .cse0) (or .cse4 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse19 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (mod (+ .cse19 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse18 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse18 127)) (<= (mod (+ .cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (<= (mod .cse19 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse18) 256) 0))))))) (or (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse20 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod .cse20 256))) (or (not (<= (mod (+ .cse20 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse21) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse21 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse21 |c_ULTIMATE.start_main1_~y~0#1|) (<= (mod (+ .cse20 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127))))) .cse4) (or (and (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse23 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse22 (mod .cse23 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse22) 256) 0)) (not (<= (mod (+ .cse23 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (<= (mod (+ .cse23 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (not (<= .cse22 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse22 |c_ULTIMATE.start_main1_~y~0#1|))))))) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse25 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ .cse25 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse24 |c_ULTIMATE.start_main1_~y~0#1|) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (<= .cse24 127)) (<= (mod (+ .cse25 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (not (<= (mod .cse25 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse24) 256) 0)) (= .cse25 0)))))))) .cse4) (or (and (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse27 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (not (<= .cse26 127)) (<= .cse26 |c_ULTIMATE.start_main1_~y~0#1|) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse26) 256) 0)) (< 127 (mod .cse27 256)) (< 127 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)))))))) .cse5) .cse0)))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true [2022-07-12 08:41:23,174 WARN L233 SmtUtils]: Spent 37.90s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:41:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-12 08:41:24,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:41:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035058892] [2022-07-12 08:41:24,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:41:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674050435] [2022-07-12 08:41:24,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674050435] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:41:24,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:41:24,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-12 08:41:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270770244] [2022-07-12 08:41:24,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:41:24,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 08:41:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:41:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 08:41:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=192, Unknown=6, NotChecked=28, Total=272 [2022-07-12 08:41:24,556 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:41:26,639 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (< |c_ULTIMATE.start_gcd_test_~b#1| 0))) (let ((.cse0 (not .cse1))) (and (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~y~0#1|) .cse0 (or (<= |c_ULTIMATE.start_main1_~y~0#1| 0) (let ((.cse4 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse31 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse30 (mod .cse31 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse30) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod (+ .cse31 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (not (<= .cse30 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse30 |c_ULTIMATE.start_main1_~y~0#1|) (<= (mod (+ .cse31 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)))))) (.cse5 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse28 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse29 (mod .cse28 256))) (or (not (<= (mod (+ .cse28 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse29) 256) 0)) (not (<= (mod (+ .cse28 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (not (<= .cse29 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse29 |c_ULTIMATE.start_main1_~y~0#1|))))) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|))))) (and (or .cse1 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse3 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse2 (mod (+ .cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (not (<= .cse2 127)) (<= .cse2 |c_ULTIMATE.start_main1_~y~0#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod .cse3 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse2) 256) 0)) (<= (mod (+ .cse3 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)))))) (or .cse1 .cse4) (or .cse0 (and .cse5 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse7 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse6 (mod (+ .cse7 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse6 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (not (<= .cse6 127)) (< 127 (mod (+ .cse7 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (< 127 (mod .cse7 256)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse6) 256) 0)))))))))) (or .cse0 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse9 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse8 (mod (+ .cse9 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse8 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse8 127)) (<= (mod .cse9 256) 127) (< 127 (mod (+ .cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse8) 256) 0))))))) (or .cse1 (and (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse10 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse11 (mod .cse10 256))) (or (not (<= (mod (+ .cse10 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse11) 256) 0)) (not (<= .cse11 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse11 |c_ULTIMATE.start_main1_~y~0#1|) (<= (mod (+ .cse10 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127))))) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|))) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse13 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 (mod (+ .cse13 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (not (<= .cse12 127)) (<= .cse12 |c_ULTIMATE.start_main1_~y~0#1|) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse12) 256) 0)) (not (<= (mod .cse13 256) 127)) (<= (mod (+ .cse13 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127) (= .cse13 0))))))))) (or .cse1 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse15 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse14 (mod .cse15 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse14) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= (mod (+ .cse15 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (<= (mod (+ .cse15 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (not (<= .cse14 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse14 |c_ULTIMATE.start_main1_~y~0#1|)))))) (or .cse0 .cse4) (or (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse17 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse16 (mod (+ .cse17 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (not (<= .cse16 127)) (<= .cse16 |c_ULTIMATE.start_main1_~y~0#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod .cse17 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse16) 256) 0)) (< 127 (mod (+ .cse17 |c_ULTIMATE.start_gcd_test_~b#1|) 256)))))) .cse1) (or .cse0 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse19 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (mod (+ .cse19 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse18 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse18 127)) (<= (mod (+ .cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (<= (mod .cse19 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse18) 256) 0))))))) (or (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse20 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod .cse20 256))) (or (not (<= (mod (+ .cse20 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse21) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse21 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse21 |c_ULTIMATE.start_main1_~y~0#1|) (<= (mod (+ .cse20 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127))))) .cse0) (or (and (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse23 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse22 (mod .cse23 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse22) 256) 0)) (not (<= (mod (+ .cse23 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (<= (mod (+ .cse23 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (not (<= .cse22 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= .cse22 |c_ULTIMATE.start_main1_~y~0#1|))))))) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse25 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ .cse25 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (<= .cse24 |c_ULTIMATE.start_main1_~y~0#1|) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (<= .cse24 127)) (<= (mod (+ .cse25 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256) 127) (not (<= (mod .cse25 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse24) 256) 0)) (= .cse25 0)))))))) .cse0) (or (and (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse27 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (or (<= 0 |ULTIMATE.start_gcd_test_~a#1|) (not (<= .cse26 127)) (<= .cse26 |c_ULTIMATE.start_main1_~y~0#1|) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse26) 256) 0)) (< 127 (mod .cse27 256)) (< 127 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)))))))) .cse5) .cse1))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127)))) is different from true [2022-07-12 08:41:33,827 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 116 DAG size of output: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:41:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:41:34,364 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-07-12 08:41:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 08:41:34,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 08:41:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:41:34,365 INFO L225 Difference]: With dead ends: 40 [2022-07-12 08:41:34,366 INFO L226 Difference]: Without dead ends: 34 [2022-07-12 08:41:34,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 86.0s TimeCoverageRelationStatistics Valid=70, Invalid=273, Unknown=7, NotChecked=70, Total=420 [2022-07-12 08:41:34,367 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 08:41:34,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-07-12 08:41:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-12 08:41:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-07-12 08:41:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 08:41:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-07-12 08:41:34,370 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 13 [2022-07-12 08:41:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:41:34,370 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-07-12 08:41:34,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:41:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-07-12 08:41:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 08:41:34,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:41:34,371 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:41:34,387 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 08:41:34,572 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 08:41:34,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:41:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:41:34,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1682229690, now seen corresponding path program 3 times [2022-07-12 08:41:34,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:41:34,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977530993] [2022-07-12 08:41:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:41:34,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:41:34,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:41:34,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646623834] [2022-07-12 08:41:34,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 08:41:34,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:41:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:41:34,588 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 08:41:34,590 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 08:41:34,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 08:41:34,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 08:41:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 08:41:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:42:01,982 WARN L233 SmtUtils]: Spent 20.87s on a formula simplification. DAG size of input: 64 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:43:27,752 WARN L233 SmtUtils]: Spent 59.88s on a formula simplification that was a NOOP. DAG size: 162 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:44:24,337 WARN L233 SmtUtils]: Spent 37.88s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:44:28,092 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse5 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_20|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0))))) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse0 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (and (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| (+ (- 256) (mod (+ .cse0 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256))) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (and (<= (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|) (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256) (+ 256 |v_ULTIMATE.start_gcd_test_~a#1_20|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|) 0))) (< 127 (mod (+ .cse0 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256))))) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|))) (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse1 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (and (not (<= (mod (+ .cse1 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) 127)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| (mod .cse1 256)) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (and (<= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) |v_ULTIMATE.start_gcd_test_~a#1_20|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0))) (not (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0))))))) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse2 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (and (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| (+ (- 256) (mod (+ .cse2 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256))) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (let ((.cse3 (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|))) (and (<= (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|) (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256) (+ 256 |v_ULTIMATE.start_gcd_test_~a#1_20|)) (not (= .cse3 0)) (= (mod (+ (* 255 |c_ULTIMATE.start_gcd_test_#res#1|) .cse3) 256) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_20| 0)))) (<= (mod (+ .cse2 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) 127) (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (not (= .cse2 0))))))) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int) (|v_ULTIMATE.start_gcd_test_~a#1_18| Int) (|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (let ((.cse4 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| (+ (- 256) (mod (+ .cse4 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256))) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|) (< 127 (mod (+ .cse4 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256)) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0))))) .cse5) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse6 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (and (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| (+ (- 256) (mod (+ .cse6 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256))) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (<= (mod (+ .cse6 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) 127) (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (not (= .cse6 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (and (<= (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|) (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256) (+ 256 |v_ULTIMATE.start_gcd_test_~a#1_20|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|) 0)))))))) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse7 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (and (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| (+ (- 256) (mod (+ .cse7 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256))) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (let ((.cse8 (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|))) (and (<= (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|) (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256) (+ 256 |v_ULTIMATE.start_gcd_test_~a#1_20|)) (not (= .cse8 0)) (= (mod (+ (* 255 |c_ULTIMATE.start_gcd_test_#res#1|) .cse8) 256) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_20| 0)))) (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (< 127 (mod (+ .cse7 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256))))) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|))) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse9 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (and (not (<= (mod (+ .cse9 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) 127)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| (mod .cse9 256)) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (not (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (and (<= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) |v_ULTIMATE.start_gcd_test_~a#1_20|) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|) 0)))))) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|))) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse11 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (let ((.cse10 (mod .cse11 256))) (and (not (= .cse10 0)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| .cse10) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (<= (mod (+ .cse11 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (and (<= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) |v_ULTIMATE.start_gcd_test_~a#1_20|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0))) (not (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0)))))) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|))) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int) (|v_ULTIMATE.start_gcd_test_~a#1_18| Int) (|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (let ((.cse12 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| (+ (- 256) (mod (+ .cse12 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_16|)) 256))) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (<= (mod (+ .cse12 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) 127) (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (not (= .cse12 0)) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0))))) .cse5) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_16| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~b#1_16| 0)) (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_19| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_16| |v_ULTIMATE.start_gcd_test_~a#1_19|) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (let ((.cse14 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|))) (let ((.cse13 (mod .cse14 256))) (and (not (= .cse13 0)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_19| .cse13) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (<= (mod (+ .cse14 |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) 127) (not (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_20| Int)) (and (<= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| |v_ULTIMATE.start_gcd_test_~b#1_16|) 256) |v_ULTIMATE.start_gcd_test_~a#1_20|) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_20| |c_ULTIMATE.start_gcd_test_#res#1|) 0))))))))) (not (< |v_ULTIMATE.start_gcd_test_~b#1_16| 0)))))) (<= |c_ULTIMATE.start_main1_~y~0#1| 127)) is different from false