./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_3+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_3+newton_3_6.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 cefb3bae89bbacb2fe493d14201bba1802fb381afd861fd412b13151077489a8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 08:50:47,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 08:50:47,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 08:50:47,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 08:50:47,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 08:50:47,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 08:50:47,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 08:50:47,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 08:50:47,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 08:50:47,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 08:50:47,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 08:50:47,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 08:50:47,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 08:50:47,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 08:50:47,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 08:50:47,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 08:50:47,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 08:50:47,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 08:50:47,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 08:50:47,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 08:50:47,068 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 08:50:47,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 08:50:47,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 08:50:47,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 08:50:47,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 08:50:47,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 08:50:47,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 08:50:47,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 08:50:47,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 08:50:47,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 08:50:47,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 08:50:47,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 08:50:47,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 08:50:47,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 08:50:47,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 08:50:47,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 08:50:47,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 08:50:47,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 08:50:47,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 08:50:47,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 08:50:47,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 08:50:47,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 08:50:47,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 08:50:47,107 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 08:50:47,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 08:50:47,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 08:50:47,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 08:50:47,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 08:50:47,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 08:50:47,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 08:50:47,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 08:50:47,110 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 08:50:47,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 08:50:47,110 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 08:50:47,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 08:50:47,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 08:50:47,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 08:50:47,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 08:50:47,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 08:50:47,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 08:50:47,111 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 08:50:47,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 08:50:47,111 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 08:50:47,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 08:50:47,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 08:50:47,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 08:50:47,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 08:50:47,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:50:47,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 08:50:47,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 08:50:47,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 08:50:47,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 08:50:47,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 08:50:47,113 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 08:50:47,114 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 08:50:47,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 08:50:47,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cefb3bae89bbacb2fe493d14201bba1802fb381afd861fd412b13151077489a8 [2022-07-12 08:50:47,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 08:50:47,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 08:50:47,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 08:50:47,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 08:50:47,354 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 08:50:47,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_3+newton_3_6.i [2022-07-12 08:50:47,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7077e5b92/e09a7e3c1b63452ab54ec14a757d50fc/FLAG6950f0baf [2022-07-12 08:50:47,756 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 08:50:47,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i [2022-07-12 08:50:47,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7077e5b92/e09a7e3c1b63452ab54ec14a757d50fc/FLAG6950f0baf [2022-07-12 08:50:48,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7077e5b92/e09a7e3c1b63452ab54ec14a757d50fc [2022-07-12 08:50:48,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 08:50:48,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 08:50:48,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 08:50:48,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 08:50:48,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 08:50:48,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122cbc54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48, skipping insertion in model container [2022-07-12 08:50:48,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 08:50:48,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 08:50:48,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i[1226,1239] [2022-07-12 08:50:48,369 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i[2862,2875] [2022-07-12 08:50:48,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:50:48,375 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 08:50:48,382 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i[1226,1239] [2022-07-12 08:50:48,389 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i[2862,2875] [2022-07-12 08:50:48,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 08:50:48,402 INFO L208 MainTranslator]: Completed translation [2022-07-12 08:50:48,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48 WrapperNode [2022-07-12 08:50:48,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 08:50:48,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 08:50:48,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 08:50:48,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 08:50:48,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,438 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2022-07-12 08:50:48,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 08:50:48,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 08:50:48,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 08:50:48,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 08:50:48,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 08:50:48,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 08:50:48,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 08:50:48,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 08:50:48,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (1/1) ... [2022-07-12 08:50:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 08:50:48,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:50:48,507 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 08:50:48,513 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 08:50:48,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 08:50:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-12 08:50:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-12 08:50:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-12 08:50:48,536 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-12 08:50:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 08:50:48,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 08:50:48,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 08:50:48,589 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 08:50:48,590 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 08:50:48,741 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 08:50:48,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 08:50:48,747 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 08:50:48,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:50:48 BoogieIcfgContainer [2022-07-12 08:50:48,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 08:50:48,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 08:50:48,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 08:50:48,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 08:50:48,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 08:50:48" (1/3) ... [2022-07-12 08:50:48,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3420b681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:50:48, skipping insertion in model container [2022-07-12 08:50:48,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 08:50:48" (2/3) ... [2022-07-12 08:50:48,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3420b681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 08:50:48, skipping insertion in model container [2022-07-12 08:50:48,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 08:50:48" (3/3) ... [2022-07-12 08:50:48,755 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_6.i [2022-07-12 08:50:48,767 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 08:50:48,767 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 08:50:48,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 08:50:48,820 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@2164078, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@520c41ae [2022-07-12 08:50:48,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 08:50:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:50:48,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:50:48,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:50:48,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:50:48,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:50:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:50:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-07-12 08:50:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:50:48,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986105238] [2022-07-12 08:50:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:50:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:50:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:50:49,008 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 08:50:49,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:50:49,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986105238] [2022-07-12 08:50:49,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986105238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:50:49,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:50:49,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 08:50:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281619418] [2022-07-12 08:50:49,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:50:49,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 08:50:49,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:50:49,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 08:50:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 08:50:49,033 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:50:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:50:49,071 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-07-12 08:50:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 08:50:49,074 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 08:50:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:50:49,079 INFO L225 Difference]: With dead ends: 96 [2022-07-12 08:50:49,079 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 08:50:49,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 08:50:49,085 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:50:49,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:50:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 08:50:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-07-12 08:50:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:50:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-07-12 08:50:49,122 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-07-12 08:50:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:50:49,123 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-07-12 08:50:49,123 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 08:50:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-07-12 08:50:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 08:50:49,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:50:49,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:50:49,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 08:50:49,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:50:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:50:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2022-07-12 08:50:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:50:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099062449] [2022-07-12 08:50:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:50:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:50:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:50:49,226 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 08:50:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:50:49,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099062449] [2022-07-12 08:50:49,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099062449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 08:50:49,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 08:50:49,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 08:50:49,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824316935] [2022-07-12 08:50:49,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 08:50:49,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 08:50:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:50:49,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 08:50:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 08:50:49,235 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:50:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:50:49,306 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-12 08:50:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 08:50:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 08:50:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:50:49,307 INFO L225 Difference]: With dead ends: 39 [2022-07-12 08:50:49,308 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 08:50:49,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 08:50:49,309 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:50:49,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 08:50:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 08:50:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-12 08:50:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:50:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-07-12 08:50:49,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-07-12 08:50:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:50:49,319 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-07-12 08:50:49,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:50:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-07-12 08:50:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 08:50:49,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:50:49,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:50:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 08:50:49,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:50:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:50:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-07-12 08:50:49,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:50:49,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024118196] [2022-07-12 08:50:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:50:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:50:49,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:50:49,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023080865] [2022-07-12 08:50:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:50:49,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:50:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:50:49,338 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 08:50:49,366 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 08:50:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:50:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 08:50:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:51:11,922 WARN L233 SmtUtils]: Spent 19.77s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:51:31,608 WARN L233 SmtUtils]: Spent 10.82s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:51:50,696 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 08:51:50,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:52:06,717 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 08:52:06,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:52:06,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024118196] [2022-07-12 08:52:06,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:52:06,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023080865] [2022-07-12 08:52:06,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023080865] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:52:06,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:52:06,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-12 08:52:06,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740389521] [2022-07-12 08:52:06,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:52:06,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 08:52:06,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:52:06,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 08:52:06,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=203, Unknown=15, NotChecked=0, Total=272 [2022-07-12 08:52:06,720 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:52:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:52:06,932 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-12 08:52:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 08:52:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 08:52:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:52:06,933 INFO L225 Difference]: With dead ends: 41 [2022-07-12 08:52:06,934 INFO L226 Difference]: Without dead ends: 35 [2022-07-12 08:52:06,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 75.1s TimeCoverageRelationStatistics Valid=63, Invalid=228, Unknown=15, NotChecked=0, Total=306 [2022-07-12 08:52:06,935 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 08:52:06,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-12 08:52:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-12 08:52:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-07-12 08:52:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:52:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-12 08:52:06,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-07-12 08:52:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:52:06,940 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-12 08:52:06,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:52:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-12 08:52:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 08:52:06,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:52:06,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:52:06,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 08:52:07,147 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 08:52:07,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:52:07,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:52:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 20667420, now seen corresponding path program 1 times [2022-07-12 08:52:07,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:52:07,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432768883] [2022-07-12 08:52:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:52:07,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:52:07,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:52:07,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565778931] [2022-07-12 08:52:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:52:07,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:52:07,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:52:07,164 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 08:52:07,164 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 08:52:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 08:52:07,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 08:52:07,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:52:23,828 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 08:52:23,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 08:52:35,238 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 08:52:35,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 08:52:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432768883] [2022-07-12 08:52:35,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 08:52:35,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565778931] [2022-07-12 08:52:35,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565778931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 08:52:35,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 08:52:35,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-07-12 08:52:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890987685] [2022-07-12 08:52:35,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 08:52:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 08:52:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 08:52:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 08:52:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=179, Unknown=8, NotChecked=0, Total=240 [2022-07-12 08:52:35,240 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:52:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 08:52:35,846 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-07-12 08:52:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 08:52:35,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 08:52:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 08:52:35,847 INFO L225 Difference]: With dead ends: 46 [2022-07-12 08:52:35,847 INFO L226 Difference]: Without dead ends: 37 [2022-07-12 08:52:35,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=62, Invalid=202, Unknown=8, NotChecked=0, Total=272 [2022-07-12 08:52:35,848 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 08:52:35,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 281 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-07-12 08:52:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-12 08:52:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-12 08:52:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 08:52:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-07-12 08:52:35,858 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-07-12 08:52:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 08:52:35,859 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-07-12 08:52:35,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 08:52:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-07-12 08:52:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 08:52:35,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 08:52:35,860 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 08:52:35,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 08:52:36,067 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 08:52:36,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 08:52:36,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 08:52:36,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2022-07-12 08:52:36,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 08:52:36,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979495693] [2022-07-12 08:52:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 08:52:36,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 08:52:36,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 08:52:36,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167141485] [2022-07-12 08:52:36,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 08:52:36,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 08:52:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 08:52:36,077 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 08:52:36,078 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 08:52:36,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 08:52:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 08:52:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 08:52:36,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 08:52:46,965 WARN L233 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 67 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:53:25,157 WARN L233 SmtUtils]: Spent 17.07s on a formula simplification. DAG size of input: 92 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:53:37,344 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse0 (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (or (and (not .cse0) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse2 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse1 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse2) 256))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse1 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= .cse2 127) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (not (= .cse1 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse2 .cse1) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|)))))) (and .cse0 (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse6 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse7 (+ (- 256) .cse6))) (let ((.cse4 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse7) 256))) (let ((.cse3 (mod .cse7 .cse4)) (.cse5 (mod .cse4 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse3 0)) (<= (mod (+ .cse3 .cse4) 256) 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse5 256)) (< 127 .cse6) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse3 (* 255 .cse4)) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|) (< 127 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse5) 256)) (= .cse5 0))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse10 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse11 (+ (- 256) .cse10))) (let ((.cse8 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse11) 256))) (let ((.cse9 (mod .cse11 .cse8))) (and (not (= .cse8 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (< 127 (mod (+ .cse9 .cse8) 256)) (< 127 .cse10) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse9 (* 255 .cse8)) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse15 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse16 (+ (- 256) .cse15))) (let ((.cse12 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse16) 256))) (let ((.cse14 (mod .cse16 .cse12)) (.cse13 (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse12 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse13 256)) (< 127 (mod (+ .cse14 .cse12) 256)) (< 127 .cse15) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse14 (* 255 .cse12)) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|) (= .cse13 0))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_17| Int) (|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (let ((.cse20 (mod (* 255 |v_ULTIMATE.start_gcd_test_~b#1_17|) 256))) (let ((.cse21 (+ (- 256) .cse20))) (let ((.cse18 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse21) 256))) (let ((.cse17 (mod .cse21 .cse18)) (.cse19 (mod .cse18 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse17 0)) (<= (mod (+ .cse17 .cse18) 256) 127) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse19 256)) (< 127 .cse20) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ .cse17 (* 255 .cse18)) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_15|) (< 127 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse19) 256)))))))))))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-07-12 08:54:04,104 WARN L233 SmtUtils]: Spent 16.85s on a formula simplification. DAG size of input: 68 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:54:29,734 WARN L233 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 08:54:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-12 08:54:34,758 INFO L328 TraceCheckSpWp]: Computing backward predicates...