./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_2_7.i --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 03d7b7b3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_2_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 5365e3b9adf0a1dadb935cfdb4266af37826f3120fbeff3f7ce577b21fb856a6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 19:36:41,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 19:36:41,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 19:36:41,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 19:36:41,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 19:36:41,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 19:36:41,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 19:36:41,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 19:36:41,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 19:36:41,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 19:36:41,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 19:36:41,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 19:36:41,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 19:36:41,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 19:36:41,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 19:36:41,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 19:36:41,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 19:36:41,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 19:36:41,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 19:36:41,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 19:36:41,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 19:36:41,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 19:36:41,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 19:36:41,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 19:36:41,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 19:36:41,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 19:36:41,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 19:36:41,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 19:36:41,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 19:36:41,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 19:36:41,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 19:36:41,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 19:36:41,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 19:36:41,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 19:36:41,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 19:36:41,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 19:36:41,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 19:36:41,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 19:36:41,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 19:36:41,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 19:36:41,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 19:36:41,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-20 19:36:41,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 19:36:41,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 19:36:41,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 19:36:41,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 19:36:41,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 19:36:41,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 19:36:41,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 19:36:41,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 19:36:41,210 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 19:36:41,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 19:36:41,211 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 19:36:41,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 19:36:41,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 19:36:41,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 19:36:41,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 19:36:41,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 19:36:41,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 19:36:41,212 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 19:36:41,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 19:36:41,212 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 19:36:41,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 19:36:41,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 19:36:41,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 19:36:41,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 19:36:41,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:36:41,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 19:36:41,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 19:36:41,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 19:36:41,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 19:36:41,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 19:36:41,214 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 19:36:41,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 19:36:41,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 19:36:41,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5365e3b9adf0a1dadb935cfdb4266af37826f3120fbeff3f7ce577b21fb856a6 [2022-02-20 19:36:41,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 19:36:41,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 19:36:41,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 19:36:41,446 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 19:36:41,446 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 19:36:41,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_7.i [2022-02-20 19:36:41,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c71f3ef2/9bf30decf0d44efc9762411e6e11c60f/FLAGce33b3de7 [2022-02-20 19:36:41,884 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 19:36:41,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i [2022-02-20 19:36:41,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c71f3ef2/9bf30decf0d44efc9762411e6e11c60f/FLAGce33b3de7 [2022-02-20 19:36:41,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c71f3ef2/9bf30decf0d44efc9762411e6e11c60f [2022-02-20 19:36:41,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 19:36:41,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 19:36:41,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 19:36:41,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 19:36:41,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 19:36:41,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:36:41" (1/1) ... [2022-02-20 19:36:41,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8519b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:41, skipping insertion in model container [2022-02-20 19:36:41,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:36:41" (1/1) ... [2022-02-20 19:36:41,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 19:36:41,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 19:36:42,075 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i[1224,1237] [2022-02-20 19:36:42,109 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i[2827,2840] [2022-02-20 19:36:42,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:36:42,121 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 19:36:42,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i[1224,1237] [2022-02-20 19:36:42,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i[2827,2840] [2022-02-20 19:36:42,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:36:42,152 INFO L208 MainTranslator]: Completed translation [2022-02-20 19:36:42,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42 WrapperNode [2022-02-20 19:36:42,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 19:36:42,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 19:36:42,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 19:36:42,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 19:36:42,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,203 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 72 [2022-02-20 19:36:42,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 19:36:42,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 19:36:42,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 19:36:42,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 19:36:42,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 19:36:42,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 19:36:42,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 19:36:42,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 19:36:42,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (1/1) ... [2022-02-20 19:36:42,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:36:42,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:42,266 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) [2022-02-20 19:36:42,268 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 [2022-02-20 19:36:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 19:36:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-02-20 19:36:42,295 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-02-20 19:36:42,295 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-02-20 19:36:42,295 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-02-20 19:36:42,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-20 19:36:42,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 19:36:42,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 19:36:42,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-20 19:36:42,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-20 19:36:42,353 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 19:36:42,355 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 19:36:42,553 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 19:36:42,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 19:36:42,571 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 19:36:42,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:36:42 BoogieIcfgContainer [2022-02-20 19:36:42,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 19:36:42,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 19:36:42,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 19:36:42,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 19:36:42,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 07:36:41" (1/3) ... [2022-02-20 19:36:42,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a32a01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:36:42, skipping insertion in model container [2022-02-20 19:36:42,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:42" (2/3) ... [2022-02-20 19:36:42,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a32a01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:36:42, skipping insertion in model container [2022-02-20 19:36:42,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:36:42" (3/3) ... [2022-02-20 19:36:42,579 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_7.i [2022-02-20 19:36:42,582 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 19:36:42,588 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-20 19:36:42,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 19:36:42,652 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-20 19:36:42,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-20 19:36:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 19:36:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-20 19:36:42,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:42,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:42,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:42,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-02-20 19:36:42,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:42,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728281179] [2022-02-20 19:36:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:42,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:42,880 INFO L290 TraceCheckUtils]: 0: Hoare triple {46#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {46#true} is VALID [2022-02-20 19:36:42,880 INFO L290 TraceCheckUtils]: 1: Hoare triple {46#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1;assume -2147483648 <= main_#t~nondet11#1 && main_#t~nondet11#1 <= 2147483647; {46#true} is VALID [2022-02-20 19:36:42,887 INFO L290 TraceCheckUtils]: 2: Hoare triple {46#true} assume 0 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63;main1_~y~0#1 := 18;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {48#(and (<= 63 |ULTIMATE.start_main1_~x~0#1|) (= (+ (* |ULTIMATE.start_gcd_test_~a#1| (- 1)) |ULTIMATE.start_main1_~x~0#1|) 0))} is VALID [2022-02-20 19:36:42,888 INFO L290 TraceCheckUtils]: 3: Hoare triple {48#(and (<= 63 |ULTIMATE.start_main1_~x~0#1|) (= (+ (* |ULTIMATE.start_gcd_test_~a#1| (- 1)) |ULTIMATE.start_main1_~x~0#1|) 0))} assume gcd_test_~a#1 < 0;gcd_test_~a#1 := -gcd_test_~a#1; {47#false} is VALID [2022-02-20 19:36:42,889 INFO L290 TraceCheckUtils]: 4: Hoare triple {47#false} assume gcd_test_~b#1 < 0;gcd_test_~b#1 := -gcd_test_~b#1; {47#false} is VALID [2022-02-20 19:36:42,889 INFO L290 TraceCheckUtils]: 5: Hoare triple {47#false} assume 0 == gcd_test_~a#1;gcd_test_#res#1 := gcd_test_~b#1; {47#false} is VALID [2022-02-20 19:36:42,889 INFO L290 TraceCheckUtils]: 6: Hoare triple {47#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -2147483648 <= main1_#t~ret5#1 && main1_#t~ret5#1 <= 2147483647;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {47#false} is VALID [2022-02-20 19:36:42,889 INFO L272 TraceCheckUtils]: 7: Hoare triple {47#false} call __VERIFIER_assert((if 0 == (if main1_~x~0#1 < 0 && 0 != main1_~x~0#1 % main1_~g~0#1 then (if main1_~g~0#1 < 0 then main1_~x~0#1 % main1_~g~0#1 + main1_~g~0#1 else main1_~x~0#1 % main1_~g~0#1 - main1_~g~0#1) else main1_~x~0#1 % main1_~g~0#1) then 1 else 0)); {47#false} is VALID [2022-02-20 19:36:42,890 INFO L290 TraceCheckUtils]: 8: Hoare triple {47#false} ~cond := #in~cond; {47#false} is VALID [2022-02-20 19:36:42,890 INFO L290 TraceCheckUtils]: 9: Hoare triple {47#false} assume 0 == ~cond; {47#false} is VALID [2022-02-20 19:36:42,890 INFO L290 TraceCheckUtils]: 10: Hoare triple {47#false} assume !false; {47#false} is VALID [2022-02-20 19:36:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:36:42,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:42,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728281179] [2022-02-20 19:36:42,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728281179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:36:42,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:36:42,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 19:36:42,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652388997] [2022-02-20 19:36:42,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:36:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-20 19:36:42,898 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:42,900 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:42,914 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:36:42,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 19:36:42,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 19:36:42,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:36:42,941 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,076 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-02-20 19:36:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 19:36:43,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-20 19:36:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2022-02-20 19:36:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2022-02-20 19:36:43,090 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 127 transitions. [2022-02-20 19:36:43,189 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 127 edges. 127 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:36:43,196 INFO L225 Difference]: With dead ends: 93 [2022-02-20 19:36:43,196 INFO L226 Difference]: Without dead ends: 43 [2022-02-20 19:36:43,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:36:43,200 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 19:36:43,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 19:36:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-20 19:36:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-02-20 19:36:43,220 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:43,221 INFO L82 GeneralOperation]: Start isEquivalent. First operand 43 states. Second operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,222 INFO L74 IsIncluded]: Start isIncluded. First operand 43 states. Second operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,222 INFO L87 Difference]: Start difference. First operand 43 states. Second operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,226 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-20 19:36:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-20 19:36:43,226 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:43,226 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:43,227 INFO L74 IsIncluded]: Start isIncluded. First operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 43 states. [2022-02-20 19:36:43,227 INFO L87 Difference]: Start difference. First operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 43 states. [2022-02-20 19:36:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,230 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-20 19:36:43,230 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-20 19:36:43,231 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:43,231 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:43,231 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:43,231 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-02-20 19:36:43,235 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-02-20 19:36:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:43,235 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-02-20 19:36:43,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-02-20 19:36:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-20 19:36:43,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:43,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:43,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-20 19:36:43,237 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-02-20 19:36:43,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:43,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413500633] [2022-02-20 19:36:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:43,262 INFO L290 TraceCheckUtils]: 0: Hoare triple {312#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {312#true} is VALID [2022-02-20 19:36:43,263 INFO L290 TraceCheckUtils]: 1: Hoare triple {312#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1;assume -2147483648 <= main_#t~nondet11#1 && main_#t~nondet11#1 <= 2147483647; {312#true} is VALID [2022-02-20 19:36:43,263 INFO L290 TraceCheckUtils]: 2: Hoare triple {312#true} assume 0 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63;main1_~y~0#1 := 18;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {314#(= (+ |ULTIMATE.start_gcd_test_~b#1| (- 18)) 0)} is VALID [2022-02-20 19:36:43,264 INFO L290 TraceCheckUtils]: 3: Hoare triple {314#(= (+ |ULTIMATE.start_gcd_test_~b#1| (- 18)) 0)} assume !(gcd_test_~a#1 < 0); {314#(= (+ |ULTIMATE.start_gcd_test_~b#1| (- 18)) 0)} is VALID [2022-02-20 19:36:43,264 INFO L290 TraceCheckUtils]: 4: Hoare triple {314#(= (+ |ULTIMATE.start_gcd_test_~b#1| (- 18)) 0)} assume gcd_test_~b#1 < 0;gcd_test_~b#1 := -gcd_test_~b#1; {313#false} is VALID [2022-02-20 19:36:43,264 INFO L290 TraceCheckUtils]: 5: Hoare triple {313#false} assume !(0 == gcd_test_~a#1); {313#false} is VALID [2022-02-20 19:36:43,264 INFO L290 TraceCheckUtils]: 6: Hoare triple {313#false} assume !(0 != gcd_test_~b#1); {313#false} is VALID [2022-02-20 19:36:43,265 INFO L290 TraceCheckUtils]: 7: Hoare triple {313#false} gcd_test_#res#1 := gcd_test_~a#1; {313#false} is VALID [2022-02-20 19:36:43,265 INFO L290 TraceCheckUtils]: 8: Hoare triple {313#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -2147483648 <= main1_#t~ret5#1 && main1_#t~ret5#1 <= 2147483647;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {313#false} is VALID [2022-02-20 19:36:43,265 INFO L272 TraceCheckUtils]: 9: Hoare triple {313#false} call __VERIFIER_assert((if 0 == (if main1_~x~0#1 < 0 && 0 != main1_~x~0#1 % main1_~g~0#1 then (if main1_~g~0#1 < 0 then main1_~x~0#1 % main1_~g~0#1 + main1_~g~0#1 else main1_~x~0#1 % main1_~g~0#1 - main1_~g~0#1) else main1_~x~0#1 % main1_~g~0#1) then 1 else 0)); {313#false} is VALID [2022-02-20 19:36:43,265 INFO L290 TraceCheckUtils]: 10: Hoare triple {313#false} ~cond := #in~cond; {313#false} is VALID [2022-02-20 19:36:43,265 INFO L290 TraceCheckUtils]: 11: Hoare triple {313#false} assume 0 == ~cond; {313#false} is VALID [2022-02-20 19:36:43,265 INFO L290 TraceCheckUtils]: 12: Hoare triple {313#false} assume !false; {313#false} is VALID [2022-02-20 19:36:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:36:43,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:43,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413500633] [2022-02-20 19:36:43,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413500633] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:36:43,266 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:36:43,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 19:36:43,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440721826] [2022-02-20 19:36:43,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:36:43,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-20 19:36:43,268 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:43,268 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,283 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 13 edges. 13 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:36:43,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 19:36:43,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 19:36:43,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:36:43,284 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,329 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-02-20 19:36:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 19:36:43,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-20 19:36:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2022-02-20 19:36:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2022-02-20 19:36:43,333 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 63 transitions. [2022-02-20 19:36:43,373 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 63 edges. 63 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:36:43,375 INFO L225 Difference]: With dead ends: 52 [2022-02-20 19:36:43,375 INFO L226 Difference]: Without dead ends: 38 [2022-02-20 19:36:43,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:36:43,376 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 19:36:43,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 19:36:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-20 19:36:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-20 19:36:43,380 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:43,380 INFO L82 GeneralOperation]: Start isEquivalent. First operand 38 states. Second operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,381 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,381 INFO L87 Difference]: Start difference. First operand 38 states. Second operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,383 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-02-20 19:36:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-02-20 19:36:43,383 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:43,383 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:43,384 INFO L74 IsIncluded]: Start isIncluded. First operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 38 states. [2022-02-20 19:36:43,384 INFO L87 Difference]: Start difference. First operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 38 states. [2022-02-20 19:36:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,386 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-02-20 19:36:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-02-20 19:36:43,387 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:43,387 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:43,387 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:43,387 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-02-20 19:36:43,389 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-02-20 19:36:43,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:43,389 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-02-20 19:36:43,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-02-20 19:36:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-20 19:36:43,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:43,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:43,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-20 19:36:43,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:43,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-02-20 19:36:43,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:43,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722170712] [2022-02-20 19:36:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:43,404 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 19:36:43,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063263939] [2022-02-20 19:36:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:43,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:36:43,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:43,425 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) [2022-02-20 19:36:43,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-20 19:36:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-20 19:36:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:43,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:36:43,623 INFO L290 TraceCheckUtils]: 0: Hoare triple {515#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {515#true} is VALID [2022-02-20 19:36:43,623 INFO L290 TraceCheckUtils]: 1: Hoare triple {515#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1;assume -2147483648 <= main_#t~nondet11#1 && main_#t~nondet11#1 <= 2147483647; {515#true} is VALID [2022-02-20 19:36:43,624 INFO L290 TraceCheckUtils]: 2: Hoare triple {515#true} assume 0 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63;main1_~y~0#1 := 18;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:43,624 INFO L290 TraceCheckUtils]: 3: Hoare triple {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !(gcd_test_~a#1 < 0); {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:43,625 INFO L290 TraceCheckUtils]: 4: Hoare triple {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !(gcd_test_~b#1 < 0); {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:43,625 INFO L290 TraceCheckUtils]: 5: Hoare triple {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !(0 == gcd_test_~a#1); {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:43,626 INFO L290 TraceCheckUtils]: 6: Hoare triple {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !!(0 != gcd_test_~b#1); {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:43,626 INFO L290 TraceCheckUtils]: 7: Hoare triple {526#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !(gcd_test_~a#1 > gcd_test_~b#1);gcd_test_~b#1 := gcd_test_~b#1 - gcd_test_~a#1; {542#(<= (+ |ULTIMATE.start_gcd_test_~b#1| 45) 0)} is VALID [2022-02-20 19:36:43,627 INFO L290 TraceCheckUtils]: 8: Hoare triple {542#(<= (+ |ULTIMATE.start_gcd_test_~b#1| 45) 0)} assume !(0 != gcd_test_~b#1); {516#false} is VALID [2022-02-20 19:36:43,627 INFO L290 TraceCheckUtils]: 9: Hoare triple {516#false} gcd_test_#res#1 := gcd_test_~a#1; {516#false} is VALID [2022-02-20 19:36:43,627 INFO L290 TraceCheckUtils]: 10: Hoare triple {516#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -2147483648 <= main1_#t~ret5#1 && main1_#t~ret5#1 <= 2147483647;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {516#false} is VALID [2022-02-20 19:36:43,627 INFO L272 TraceCheckUtils]: 11: Hoare triple {516#false} call __VERIFIER_assert((if 0 == (if main1_~x~0#1 < 0 && 0 != main1_~x~0#1 % main1_~g~0#1 then (if main1_~g~0#1 < 0 then main1_~x~0#1 % main1_~g~0#1 + main1_~g~0#1 else main1_~x~0#1 % main1_~g~0#1 - main1_~g~0#1) else main1_~x~0#1 % main1_~g~0#1) then 1 else 0)); {516#false} is VALID [2022-02-20 19:36:43,627 INFO L290 TraceCheckUtils]: 12: Hoare triple {516#false} ~cond := #in~cond; {516#false} is VALID [2022-02-20 19:36:43,628 INFO L290 TraceCheckUtils]: 13: Hoare triple {516#false} assume 0 == ~cond; {516#false} is VALID [2022-02-20 19:36:43,628 INFO L290 TraceCheckUtils]: 14: Hoare triple {516#false} assume !false; {516#false} is VALID [2022-02-20 19:36:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:36:43,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-20 19:36:43,775 INFO L290 TraceCheckUtils]: 14: Hoare triple {516#false} assume !false; {516#false} is VALID [2022-02-20 19:36:43,776 INFO L290 TraceCheckUtils]: 13: Hoare triple {516#false} assume 0 == ~cond; {516#false} is VALID [2022-02-20 19:36:43,776 INFO L290 TraceCheckUtils]: 12: Hoare triple {516#false} ~cond := #in~cond; {516#false} is VALID [2022-02-20 19:36:43,776 INFO L272 TraceCheckUtils]: 11: Hoare triple {516#false} call __VERIFIER_assert((if 0 == (if main1_~x~0#1 < 0 && 0 != main1_~x~0#1 % main1_~g~0#1 then (if main1_~g~0#1 < 0 then main1_~x~0#1 % main1_~g~0#1 + main1_~g~0#1 else main1_~x~0#1 % main1_~g~0#1 - main1_~g~0#1) else main1_~x~0#1 % main1_~g~0#1) then 1 else 0)); {516#false} is VALID [2022-02-20 19:36:43,776 INFO L290 TraceCheckUtils]: 10: Hoare triple {516#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -2147483648 <= main1_#t~ret5#1 && main1_#t~ret5#1 <= 2147483647;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {516#false} is VALID [2022-02-20 19:36:43,777 INFO L290 TraceCheckUtils]: 9: Hoare triple {516#false} gcd_test_#res#1 := gcd_test_~a#1; {516#false} is VALID [2022-02-20 19:36:43,777 INFO L290 TraceCheckUtils]: 8: Hoare triple {582#(not (<= 0 |ULTIMATE.start_gcd_test_~b#1|))} assume !(0 != gcd_test_~b#1); {516#false} is VALID [2022-02-20 19:36:43,777 INFO L290 TraceCheckUtils]: 7: Hoare triple {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} assume !(gcd_test_~a#1 > gcd_test_~b#1);gcd_test_~b#1 := gcd_test_~b#1 - gcd_test_~a#1; {582#(not (<= 0 |ULTIMATE.start_gcd_test_~b#1|))} is VALID [2022-02-20 19:36:43,778 INFO L290 TraceCheckUtils]: 6: Hoare triple {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} assume !!(0 != gcd_test_~b#1); {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:43,778 INFO L290 TraceCheckUtils]: 5: Hoare triple {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} assume !(0 == gcd_test_~a#1); {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:43,779 INFO L290 TraceCheckUtils]: 4: Hoare triple {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} assume !(gcd_test_~b#1 < 0); {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:43,779 INFO L290 TraceCheckUtils]: 3: Hoare triple {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} assume !(gcd_test_~a#1 < 0); {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:43,779 INFO L290 TraceCheckUtils]: 2: Hoare triple {515#true} assume 0 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63;main1_~y~0#1 := 18;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {586#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:43,780 INFO L290 TraceCheckUtils]: 1: Hoare triple {515#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1;assume -2147483648 <= main_#t~nondet11#1 && main_#t~nondet11#1 <= 2147483647; {515#true} is VALID [2022-02-20 19:36:43,780 INFO L290 TraceCheckUtils]: 0: Hoare triple {515#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {515#true} is VALID [2022-02-20 19:36:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:36:43,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:43,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722170712] [2022-02-20 19:36:43,781 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 19:36:43,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063263939] [2022-02-20 19:36:43,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063263939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-20 19:36:43,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-20 19:36:43,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-02-20 19:36:43,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928008914] [2022-02-20 19:36:43,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-20 19:36:43,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-20 19:36:43,783 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:43,783 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,796 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 22 edges. 22 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:36:43,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-20 19:36:43,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:43,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-20 19:36:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-20 19:36:43,798 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,889 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-02-20 19:36:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-20 19:36:43,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-20 19:36:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-02-20 19:36:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-02-20 19:36:43,895 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 63 transitions. [2022-02-20 19:36:43,936 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 63 edges. 63 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:36:43,939 INFO L225 Difference]: With dead ends: 55 [2022-02-20 19:36:43,939 INFO L226 Difference]: Without dead ends: 42 [2022-02-20 19:36:43,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-20 19:36:43,943 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 19:36:43,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 19:36:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-20 19:36:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-20 19:36:43,954 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:43,955 INFO L82 GeneralOperation]: Start isEquivalent. First operand 42 states. Second operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,955 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,955 INFO L87 Difference]: Start difference. First operand 42 states. Second operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,959 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-02-20 19:36:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-02-20 19:36:43,962 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:43,962 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:43,963 INFO L74 IsIncluded]: Start isIncluded. First operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 42 states. [2022-02-20 19:36:43,963 INFO L87 Difference]: Start difference. First operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 42 states. [2022-02-20 19:36:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:43,966 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-02-20 19:36:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-02-20 19:36:43,968 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:43,968 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:43,968 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:43,968 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-02-20 19:36:43,971 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2022-02-20 19:36:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:43,972 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-02-20 19:36:43,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-02-20 19:36:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-20 19:36:43,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:43,975 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:44,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-20 19:36:44,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:36:44,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1992731711, now seen corresponding path program 1 times [2022-02-20 19:36:44,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:44,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497983013] [2022-02-20 19:36:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:44,239 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 19:36:44,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932410945] [2022-02-20 19:36:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:44,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:36:44,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:44,244 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) [2022-02-20 19:36:44,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-20 19:36:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-20 19:36:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:36:44,663 INFO L290 TraceCheckUtils]: 0: Hoare triple {824#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {824#true} is VALID [2022-02-20 19:36:44,664 INFO L290 TraceCheckUtils]: 1: Hoare triple {824#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1;assume -2147483648 <= main_#t~nondet11#1 && main_#t~nondet11#1 <= 2147483647; {824#true} is VALID [2022-02-20 19:36:44,664 INFO L290 TraceCheckUtils]: 2: Hoare triple {824#true} assume 0 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63;main1_~y~0#1 := 18;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,665 INFO L290 TraceCheckUtils]: 3: Hoare triple {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !(gcd_test_~a#1 < 0); {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,665 INFO L290 TraceCheckUtils]: 4: Hoare triple {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !(gcd_test_~b#1 < 0); {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,666 INFO L290 TraceCheckUtils]: 5: Hoare triple {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !(0 == gcd_test_~a#1); {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,666 INFO L290 TraceCheckUtils]: 6: Hoare triple {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !!(0 != gcd_test_~b#1); {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,667 INFO L290 TraceCheckUtils]: 7: Hoare triple {835#(and (<= 63 |ULTIMATE.start_gcd_test_~a#1|) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {851#(and (<= 63 (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,667 INFO L290 TraceCheckUtils]: 8: Hoare triple {851#(and (<= 63 (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !!(0 != gcd_test_~b#1); {851#(and (<= 63 (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,668 INFO L290 TraceCheckUtils]: 9: Hoare triple {851#(and (<= 63 (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {858#(and (<= 63 (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2))) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,669 INFO L290 TraceCheckUtils]: 10: Hoare triple {858#(and (<= 63 (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2))) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !!(0 != gcd_test_~b#1); {858#(and (<= 63 (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2))) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} is VALID [2022-02-20 19:36:44,669 INFO L290 TraceCheckUtils]: 11: Hoare triple {858#(and (<= 63 (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2))) (<= |ULTIMATE.start_gcd_test_~b#1| 18))} assume !(gcd_test_~a#1 > gcd_test_~b#1);gcd_test_~b#1 := gcd_test_~b#1 - gcd_test_~a#1; {865#(<= (div (+ (- 45) (* |ULTIMATE.start_gcd_test_~b#1| (- 1))) (- 2)) 18)} is VALID [2022-02-20 19:36:44,670 INFO L290 TraceCheckUtils]: 12: Hoare triple {865#(<= (div (+ (- 45) (* |ULTIMATE.start_gcd_test_~b#1| (- 1))) (- 2)) 18)} assume !(0 != gcd_test_~b#1); {825#false} is VALID [2022-02-20 19:36:44,670 INFO L290 TraceCheckUtils]: 13: Hoare triple {825#false} gcd_test_#res#1 := gcd_test_~a#1; {825#false} is VALID [2022-02-20 19:36:44,670 INFO L290 TraceCheckUtils]: 14: Hoare triple {825#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -2147483648 <= main1_#t~ret5#1 && main1_#t~ret5#1 <= 2147483647;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {825#false} is VALID [2022-02-20 19:36:44,670 INFO L272 TraceCheckUtils]: 15: Hoare triple {825#false} call __VERIFIER_assert((if 0 == (if main1_~x~0#1 < 0 && 0 != main1_~x~0#1 % main1_~g~0#1 then (if main1_~g~0#1 < 0 then main1_~x~0#1 % main1_~g~0#1 + main1_~g~0#1 else main1_~x~0#1 % main1_~g~0#1 - main1_~g~0#1) else main1_~x~0#1 % main1_~g~0#1) then 1 else 0)); {825#false} is VALID [2022-02-20 19:36:44,670 INFO L290 TraceCheckUtils]: 16: Hoare triple {825#false} ~cond := #in~cond; {825#false} is VALID [2022-02-20 19:36:44,670 INFO L290 TraceCheckUtils]: 17: Hoare triple {825#false} assume 0 == ~cond; {825#false} is VALID [2022-02-20 19:36:44,671 INFO L290 TraceCheckUtils]: 18: Hoare triple {825#false} assume !false; {825#false} is VALID [2022-02-20 19:36:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:36:44,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-20 19:36:44,830 INFO L290 TraceCheckUtils]: 18: Hoare triple {825#false} assume !false; {825#false} is VALID [2022-02-20 19:36:44,830 INFO L290 TraceCheckUtils]: 17: Hoare triple {825#false} assume 0 == ~cond; {825#false} is VALID [2022-02-20 19:36:44,830 INFO L290 TraceCheckUtils]: 16: Hoare triple {825#false} ~cond := #in~cond; {825#false} is VALID [2022-02-20 19:36:44,830 INFO L272 TraceCheckUtils]: 15: Hoare triple {825#false} call __VERIFIER_assert((if 0 == (if main1_~x~0#1 < 0 && 0 != main1_~x~0#1 % main1_~g~0#1 then (if main1_~g~0#1 < 0 then main1_~x~0#1 % main1_~g~0#1 + main1_~g~0#1 else main1_~x~0#1 % main1_~g~0#1 - main1_~g~0#1) else main1_~x~0#1 % main1_~g~0#1) then 1 else 0)); {825#false} is VALID [2022-02-20 19:36:44,831 INFO L290 TraceCheckUtils]: 14: Hoare triple {825#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -2147483648 <= main1_#t~ret5#1 && main1_#t~ret5#1 <= 2147483647;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {825#false} is VALID [2022-02-20 19:36:44,831 INFO L290 TraceCheckUtils]: 13: Hoare triple {825#false} gcd_test_#res#1 := gcd_test_~a#1; {825#false} is VALID [2022-02-20 19:36:44,831 INFO L290 TraceCheckUtils]: 12: Hoare triple {905#(not (<= 0 |ULTIMATE.start_gcd_test_~b#1|))} assume !(0 != gcd_test_~b#1); {825#false} is VALID [2022-02-20 19:36:44,832 INFO L290 TraceCheckUtils]: 11: Hoare triple {909#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} assume !(gcd_test_~a#1 > gcd_test_~b#1);gcd_test_~b#1 := gcd_test_~b#1 - gcd_test_~a#1; {905#(not (<= 0 |ULTIMATE.start_gcd_test_~b#1|))} is VALID [2022-02-20 19:36:44,832 INFO L290 TraceCheckUtils]: 10: Hoare triple {909#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} assume !!(0 != gcd_test_~b#1); {909#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,833 INFO L290 TraceCheckUtils]: 9: Hoare triple {916#(< (* |ULTIMATE.start_gcd_test_~b#1| 2) |ULTIMATE.start_gcd_test_~a#1|)} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {909#(< |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,833 INFO L290 TraceCheckUtils]: 8: Hoare triple {916#(< (* |ULTIMATE.start_gcd_test_~b#1| 2) |ULTIMATE.start_gcd_test_~a#1|)} assume !!(0 != gcd_test_~b#1); {916#(< (* |ULTIMATE.start_gcd_test_~b#1| 2) |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,834 INFO L290 TraceCheckUtils]: 7: Hoare triple {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {916#(< (* |ULTIMATE.start_gcd_test_~b#1| 2) |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,834 INFO L290 TraceCheckUtils]: 6: Hoare triple {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} assume !!(0 != gcd_test_~b#1); {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,834 INFO L290 TraceCheckUtils]: 5: Hoare triple {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} assume !(0 == gcd_test_~a#1); {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,835 INFO L290 TraceCheckUtils]: 4: Hoare triple {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} assume !(gcd_test_~b#1 < 0); {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,835 INFO L290 TraceCheckUtils]: 3: Hoare triple {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} assume !(gcd_test_~a#1 < 0); {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,836 INFO L290 TraceCheckUtils]: 2: Hoare triple {824#true} assume 0 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63;main1_~y~0#1 := 18;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {923#(< (* |ULTIMATE.start_gcd_test_~b#1| 3) |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:36:44,836 INFO L290 TraceCheckUtils]: 1: Hoare triple {824#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1;assume -2147483648 <= main_#t~nondet11#1 && main_#t~nondet11#1 <= 2147483647; {824#true} is VALID [2022-02-20 19:36:44,836 INFO L290 TraceCheckUtils]: 0: Hoare triple {824#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {824#true} is VALID [2022-02-20 19:36:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:36:44,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:44,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497983013] [2022-02-20 19:36:44,837 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 19:36:44,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932410945] [2022-02-20 19:36:44,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932410945] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-20 19:36:44,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-20 19:36:44,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-20 19:36:44,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710103877] [2022-02-20 19:36:44,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-20 19:36:44,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-20 19:36:44,838 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:44,838 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:44,858 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 30 edges. 30 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:36:44,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-20 19:36:44,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-20 19:36:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-20 19:36:44,859 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:45,037 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-02-20 19:36:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-20 19:36:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-20 19:36:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2022-02-20 19:36:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2022-02-20 19:36:45,040 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 64 transitions. [2022-02-20 19:36:45,081 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 64 edges. 64 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:36:45,082 INFO L225 Difference]: With dead ends: 57 [2022-02-20 19:36:45,083 INFO L226 Difference]: Without dead ends: 44 [2022-02-20 19:36:45,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-20 19:36:45,084 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-20 19:36:45,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 198 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 19:36:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-20 19:36:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-20 19:36:45,091 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:45,091 INFO L82 GeneralOperation]: Start isEquivalent. First operand 44 states. Second operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:45,091 INFO L74 IsIncluded]: Start isIncluded. First operand 44 states. Second operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:45,092 INFO L87 Difference]: Start difference. First operand 44 states. Second operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:45,093 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-02-20 19:36:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-02-20 19:36:45,093 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:45,093 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:45,094 INFO L74 IsIncluded]: Start isIncluded. First operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 44 states. [2022-02-20 19:36:45,094 INFO L87 Difference]: Start difference. First operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 44 states. [2022-02-20 19:36:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:45,095 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-02-20 19:36:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-02-20 19:36:45,096 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:45,096 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:45,096 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:45,096 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:36:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-02-20 19:36:45,097 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2022-02-20 19:36:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:45,098 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-02-20 19:36:45,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:36:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-02-20 19:36:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-20 19:36:45,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:45,099 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:45,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-20 19:36:45,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-20 19:36:45,315 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:45,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:45,317 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2022-02-20 19:36:45,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:45,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427522846] [2022-02-20 19:36:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:45,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:45,335 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 19:36:45,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899655744] [2022-02-20 19:36:45,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-20 19:36:45,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:36:45,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:45,364 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) [2022-02-20 19:36:45,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-20 19:36:45,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-20 19:36:45,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-20 19:36:45,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-20 19:36:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:37:17,902 INFO L290 TraceCheckUtils]: 0: Hoare triple {1175#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {1175#true} is VALID [2022-02-20 19:37:17,902 INFO L290 TraceCheckUtils]: 1: Hoare triple {1175#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1;assume -2147483648 <= main_#t~nondet11#1 && main_#t~nondet11#1 <= 2147483647; {1175#true} is VALID [2022-02-20 19:37:17,902 INFO L290 TraceCheckUtils]: 2: Hoare triple {1175#true} assume 0 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63;main1_~y~0#1 := 18;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} is VALID [2022-02-20 19:37:17,903 INFO L290 TraceCheckUtils]: 3: Hoare triple {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} assume !(gcd_test_~a#1 < 0); {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} is VALID [2022-02-20 19:37:17,903 INFO L290 TraceCheckUtils]: 4: Hoare triple {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} assume !(gcd_test_~b#1 < 0); {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} is VALID [2022-02-20 19:37:17,904 INFO L290 TraceCheckUtils]: 5: Hoare triple {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} assume !(0 == gcd_test_~a#1); {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} is VALID [2022-02-20 19:37:17,904 INFO L290 TraceCheckUtils]: 6: Hoare triple {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} assume !!(0 != gcd_test_~b#1); {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} is VALID [2022-02-20 19:37:17,905 INFO L290 TraceCheckUtils]: 7: Hoare triple {1186#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= |ULTIMATE.start_gcd_test_~a#1| 63))} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {1202#(and (<= (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|) 63) (<= 18 |ULTIMATE.start_gcd_test_~b#1|))} is VALID [2022-02-20 19:37:17,905 INFO L290 TraceCheckUtils]: 8: Hoare triple {1202#(and (<= (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|) 63) (<= 18 |ULTIMATE.start_gcd_test_~b#1|))} assume !!(0 != gcd_test_~b#1); {1202#(and (<= (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|) 63) (<= 18 |ULTIMATE.start_gcd_test_~b#1|))} is VALID [2022-02-20 19:37:17,906 INFO L290 TraceCheckUtils]: 9: Hoare triple {1202#(and (<= (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_gcd_test_~a#1|) 63) (<= 18 |ULTIMATE.start_gcd_test_~b#1|))} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {1209#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2)) 63))} is VALID [2022-02-20 19:37:17,906 INFO L290 TraceCheckUtils]: 10: Hoare triple {1209#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2)) 63))} assume !!(0 != gcd_test_~b#1); {1209#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2)) 63))} is VALID [2022-02-20 19:37:17,907 INFO L290 TraceCheckUtils]: 11: Hoare triple {1209#(and (<= 18 |ULTIMATE.start_gcd_test_~b#1|) (<= (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2)) 63))} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {1216#(and (<= (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 3)) 63) (<= 18 |ULTIMATE.start_gcd_test_~b#1|))} is VALID [2022-02-20 19:37:17,907 INFO L290 TraceCheckUtils]: 12: Hoare triple {1216#(and (<= (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 3)) 63) (<= 18 |ULTIMATE.start_gcd_test_~b#1|))} assume !!(0 != gcd_test_~b#1); {1216#(and (<= (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 3)) 63) (<= 18 |ULTIMATE.start_gcd_test_~b#1|))} is VALID [2022-02-20 19:37:17,908 INFO L290 TraceCheckUtils]: 13: Hoare triple {1216#(and (<= (+ |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 3)) 63) (<= 18 |ULTIMATE.start_gcd_test_~b#1|))} assume !(gcd_test_~a#1 > gcd_test_~b#1);gcd_test_~b#1 := gcd_test_~b#1 - gcd_test_~a#1; {1223#(<= 18 (div (+ |ULTIMATE.start_gcd_test_~b#1| 45) 3))} is VALID [2022-02-20 19:37:17,908 INFO L290 TraceCheckUtils]: 14: Hoare triple {1223#(<= 18 (div (+ |ULTIMATE.start_gcd_test_~b#1| 45) 3))} assume !(0 != gcd_test_~b#1); {1176#false} is VALID [2022-02-20 19:37:17,908 INFO L290 TraceCheckUtils]: 15: Hoare triple {1176#false} gcd_test_#res#1 := gcd_test_~a#1; {1176#false} is VALID [2022-02-20 19:37:17,908 INFO L290 TraceCheckUtils]: 16: Hoare triple {1176#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -2147483648 <= main1_#t~ret5#1 && main1_#t~ret5#1 <= 2147483647;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {1176#false} is VALID [2022-02-20 19:37:17,908 INFO L272 TraceCheckUtils]: 17: Hoare triple {1176#false} call __VERIFIER_assert((if 0 == (if main1_~x~0#1 < 0 && 0 != main1_~x~0#1 % main1_~g~0#1 then (if main1_~g~0#1 < 0 then main1_~x~0#1 % main1_~g~0#1 + main1_~g~0#1 else main1_~x~0#1 % main1_~g~0#1 - main1_~g~0#1) else main1_~x~0#1 % main1_~g~0#1) then 1 else 0)); {1176#false} is VALID [2022-02-20 19:37:17,908 INFO L290 TraceCheckUtils]: 18: Hoare triple {1176#false} ~cond := #in~cond; {1176#false} is VALID [2022-02-20 19:37:17,908 INFO L290 TraceCheckUtils]: 19: Hoare triple {1176#false} assume 0 == ~cond; {1176#false} is VALID [2022-02-20 19:37:17,909 INFO L290 TraceCheckUtils]: 20: Hoare triple {1176#false} assume !false; {1176#false} is VALID [2022-02-20 19:37:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:37:17,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-20 19:37:18,074 INFO L290 TraceCheckUtils]: 20: Hoare triple {1176#false} assume !false; {1176#false} is VALID [2022-02-20 19:37:18,074 INFO L290 TraceCheckUtils]: 19: Hoare triple {1176#false} assume 0 == ~cond; {1176#false} is VALID [2022-02-20 19:37:18,074 INFO L290 TraceCheckUtils]: 18: Hoare triple {1176#false} ~cond := #in~cond; {1176#false} is VALID [2022-02-20 19:37:18,075 INFO L272 TraceCheckUtils]: 17: Hoare triple {1176#false} call __VERIFIER_assert((if 0 == (if main1_~x~0#1 < 0 && 0 != main1_~x~0#1 % main1_~g~0#1 then (if main1_~g~0#1 < 0 then main1_~x~0#1 % main1_~g~0#1 + main1_~g~0#1 else main1_~x~0#1 % main1_~g~0#1 - main1_~g~0#1) else main1_~x~0#1 % main1_~g~0#1) then 1 else 0)); {1176#false} is VALID [2022-02-20 19:37:18,075 INFO L290 TraceCheckUtils]: 16: Hoare triple {1176#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;assume -2147483648 <= main1_#t~ret5#1 && main1_#t~ret5#1 <= 2147483647;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {1176#false} is VALID [2022-02-20 19:37:18,075 INFO L290 TraceCheckUtils]: 15: Hoare triple {1176#false} gcd_test_#res#1 := gcd_test_~a#1; {1176#false} is VALID [2022-02-20 19:37:18,075 INFO L290 TraceCheckUtils]: 14: Hoare triple {1263#(not (<= |ULTIMATE.start_gcd_test_~b#1| 0))} assume !(0 != gcd_test_~b#1); {1176#false} is VALID [2022-02-20 19:37:18,076 INFO L290 TraceCheckUtils]: 13: Hoare triple {1267#(< |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|)} assume !(gcd_test_~a#1 > gcd_test_~b#1);gcd_test_~b#1 := gcd_test_~b#1 - gcd_test_~a#1; {1263#(not (<= |ULTIMATE.start_gcd_test_~b#1| 0))} is VALID [2022-02-20 19:37:18,076 INFO L290 TraceCheckUtils]: 12: Hoare triple {1267#(< |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|)} assume !!(0 != gcd_test_~b#1); {1267#(< |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:37:18,077 INFO L290 TraceCheckUtils]: 11: Hoare triple {1274#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2))} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {1267#(< |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:37:18,077 INFO L290 TraceCheckUtils]: 10: Hoare triple {1274#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2))} assume !!(0 != gcd_test_~b#1); {1274#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2))} is VALID [2022-02-20 19:37:18,077 INFO L290 TraceCheckUtils]: 9: Hoare triple {1281#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 3))} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {1274#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 2))} is VALID [2022-02-20 19:37:18,078 INFO L290 TraceCheckUtils]: 8: Hoare triple {1281#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 3))} assume !!(0 != gcd_test_~b#1); {1281#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 3))} is VALID [2022-02-20 19:37:18,078 INFO L290 TraceCheckUtils]: 7: Hoare triple {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} assume gcd_test_~a#1 > gcd_test_~b#1;gcd_test_~a#1 := gcd_test_~a#1 - gcd_test_~b#1; {1281#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 3))} is VALID [2022-02-20 19:37:18,079 INFO L290 TraceCheckUtils]: 6: Hoare triple {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} assume !!(0 != gcd_test_~b#1); {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} is VALID [2022-02-20 19:37:18,079 INFO L290 TraceCheckUtils]: 5: Hoare triple {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} assume !(0 == gcd_test_~a#1); {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} is VALID [2022-02-20 19:37:18,079 INFO L290 TraceCheckUtils]: 4: Hoare triple {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} assume !(gcd_test_~b#1 < 0); {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} is VALID [2022-02-20 19:37:18,084 INFO L290 TraceCheckUtils]: 3: Hoare triple {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} assume !(gcd_test_~a#1 < 0); {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} is VALID [2022-02-20 19:37:18,085 INFO L290 TraceCheckUtils]: 2: Hoare triple {1175#true} assume 0 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63;main1_~y~0#1 := 18;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {1288#(< |ULTIMATE.start_gcd_test_~a#1| (* |ULTIMATE.start_gcd_test_~b#1| 4))} is VALID [2022-02-20 19:37:18,085 INFO L290 TraceCheckUtils]: 1: Hoare triple {1175#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1;assume -2147483648 <= main_#t~nondet11#1 && main_#t~nondet11#1 <= 2147483647; {1175#true} is VALID [2022-02-20 19:37:18,085 INFO L290 TraceCheckUtils]: 0: Hoare triple {1175#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(8, 2);call #Ultimate.allocInit(12, 3); {1175#true} is VALID [2022-02-20 19:37:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:37:18,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:37:18,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427522846] [2022-02-20 19:37:18,086 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 19:37:18,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899655744] [2022-02-20 19:37:18,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899655744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-20 19:37:18,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-20 19:37:18,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-20 19:37:18,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014334095] [2022-02-20 19:37:18,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-20 19:37:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-20 19:37:18,087 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:37:18,087 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:18,120 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 34 edges. 34 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:37:18,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-20 19:37:18,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:37:18,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-20 19:37:18,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-02-20 19:37:18,122 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:18,454 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2022-02-20 19:37:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-20 19:37:18,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-20 19:37:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:37:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2022-02-20 19:37:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2022-02-20 19:37:18,457 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 9 states and 78 transitions. [2022-02-20 19:37:18,510 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 78 edges. 78 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:37:18,511 INFO L225 Difference]: With dead ends: 65 [2022-02-20 19:37:18,511 INFO L226 Difference]: Without dead ends: 50 [2022-02-20 19:37:18,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-20 19:37:18,512 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-20 19:37:18,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-20 19:37:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-20 19:37:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-20 19:37:18,525 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:37:18,526 INFO L82 GeneralOperation]: Start isEquivalent. First operand 50 states. Second operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:37:18,526 INFO L74 IsIncluded]: Start isIncluded. First operand 50 states. Second operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:37:18,526 INFO L87 Difference]: Start difference. First operand 50 states. Second operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:37:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:18,528 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-02-20 19:37:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-02-20 19:37:18,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:37:18,528 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:37:18,529 INFO L74 IsIncluded]: Start isIncluded. First operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 50 states. [2022-02-20 19:37:18,529 INFO L87 Difference]: Start difference. First operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 50 states. [2022-02-20 19:37:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:18,530 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-02-20 19:37:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-02-20 19:37:18,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:37:18,530 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:37:18,531 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:37:18,531 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:37:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:37:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-02-20 19:37:18,532 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2022-02-20 19:37:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:37:18,533 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-02-20 19:37:18,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-02-20 19:37:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-20 19:37:18,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:37:18,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:37:18,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-20 19:37:18,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:37:18,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:37:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:37:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-02-20 19:37:18,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:37:18,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703885280] [2022-02-20 19:37:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:37:18,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:37:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 19:37:18,748 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-20 19:37:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 19:37:18,763 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-20 19:37:18,763 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-20 19:37:18,764 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-02-20 19:37:18,765 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-02-20 19:37:18,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-20 19:37:18,767 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-02-20 19:37:18,769 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-20 19:37:18,775 FATAL L489 DefaultTranslator]: Callstack has procedure call flag but succeeding procedure is empty at [CALL] call #t~ret7 := f(~IN~0); [2022-02-20 19:37:18,776 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: callstack broken after backtranslation by InlinerBacktranslator at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:607) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-02-20 19:37:18,778 INFO L158 Benchmark]: Toolchain (without parser) took 36873.15ms. Allocated memory was 88.1MB in the beginning and 138.4MB in the end (delta: 50.3MB). Free memory was 53.1MB in the beginning and 78.9MB in the end (delta: -25.8MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2022-02-20 19:37:18,779 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 88.1MB. Free memory was 61.2MB in the beginning and 61.1MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 19:37:18,779 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.50ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 52.9MB in the beginning and 88.7MB in the end (delta: -35.8MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2022-02-20 19:37:18,779 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.17ms. Allocated memory is still 115.3MB. Free memory was 88.7MB in the beginning and 86.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-02-20 19:37:18,779 INFO L158 Benchmark]: Boogie Preprocessor took 36.69ms. Allocated memory is still 115.3MB. Free memory was 86.7MB in the beginning and 85.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-02-20 19:37:18,780 INFO L158 Benchmark]: RCFGBuilder took 331.63ms. Allocated memory is still 115.3MB. Free memory was 85.6MB in the beginning and 72.4MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-02-20 19:37:18,780 INFO L158 Benchmark]: TraceAbstraction took 36203.55ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 71.7MB in the beginning and 78.9MB in the end (delta: -7.2MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. [2022-02-20 19:37:18,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 88.1MB. Free memory was 61.2MB in the beginning and 61.1MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 246.50ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 52.9MB in the beginning and 88.7MB in the end (delta: -35.8MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.17ms. Allocated memory is still 115.3MB. Free memory was 88.7MB in the beginning and 86.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.69ms. Allocated memory is still 115.3MB. Free memory was 86.7MB in the beginning and 85.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 331.63ms. Allocated memory is still 115.3MB. Free memory was 85.6MB in the beginning and 72.4MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 36203.55ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 71.7MB in the beginning and 78.9MB in the end (delta: -7.2MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: AssertionError: callstack broken after backtranslation by InlinerBacktranslator de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: callstack broken after backtranslation by InlinerBacktranslator: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-02-20 19:37:18,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_2_7.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5365e3b9adf0a1dadb935cfdb4266af37826f3120fbeff3f7ce577b21fb856a6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 19:37:20,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 19:37:20,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 19:37:20,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 19:37:20,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 19:37:20,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 19:37:20,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 19:37:20,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 19:37:20,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 19:37:20,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 19:37:20,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 19:37:20,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 19:37:20,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 19:37:20,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 19:37:20,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 19:37:20,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 19:37:20,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 19:37:20,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 19:37:20,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 19:37:20,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 19:37:20,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 19:37:20,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 19:37:20,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 19:37:20,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 19:37:20,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 19:37:20,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 19:37:20,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 19:37:20,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 19:37:20,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 19:37:20,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 19:37:20,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 19:37:20,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 19:37:20,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 19:37:20,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 19:37:20,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 19:37:20,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 19:37:20,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 19:37:20,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 19:37:20,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 19:37:20,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 19:37:20,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 19:37:20,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-02-20 19:37:20,561 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 19:37:20,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 19:37:20,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 19:37:20,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 19:37:20,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 19:37:20,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 19:37:20,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 19:37:20,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 19:37:20,565 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 19:37:20,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 19:37:20,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 19:37:20,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 19:37:20,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 19:37:20,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 19:37:20,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 19:37:20,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 19:37:20,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-02-20 19:37:20,567 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-02-20 19:37:20,567 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-02-20 19:37:20,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 19:37:20,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 19:37:20,567 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 19:37:20,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 19:37:20,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 19:37:20,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 19:37:20,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 19:37:20,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:37:20,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 19:37:20,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 19:37:20,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 19:37:20,569 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-02-20 19:37:20,569 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-02-20 19:37:20,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 19:37:20,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 19:37:20,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 19:37:20,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-20 19:37:20,570 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5365e3b9adf0a1dadb935cfdb4266af37826f3120fbeff3f7ce577b21fb856a6 [2022-02-20 19:37:20,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 19:37:20,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 19:37:20,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 19:37:20,871 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 19:37:20,872 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 19:37:20,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_7.i [2022-02-20 19:37:20,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35bdd2d3/37728b2e1af84390ad9e8369a44f44cc/FLAG52ae90da5 [2022-02-20 19:37:21,347 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 19:37:21,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i [2022-02-20 19:37:21,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35bdd2d3/37728b2e1af84390ad9e8369a44f44cc/FLAG52ae90da5 [2022-02-20 19:37:21,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35bdd2d3/37728b2e1af84390ad9e8369a44f44cc [2022-02-20 19:37:21,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 19:37:21,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 19:37:21,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 19:37:21,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 19:37:21,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 19:37:21,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f352e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21, skipping insertion in model container [2022-02-20 19:37:21,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 19:37:21,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 19:37:21,520 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i[1224,1237] [2022-02-20 19:37:21,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i[2827,2840] [2022-02-20 19:37:21,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:37:21,612 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 19:37:21,622 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i[1224,1237] [2022-02-20 19:37:21,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_7.i[2827,2840] [2022-02-20 19:37:21,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:37:21,656 INFO L208 MainTranslator]: Completed translation [2022-02-20 19:37:21,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21 WrapperNode [2022-02-20 19:37:21,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 19:37:21,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 19:37:21,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 19:37:21,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 19:37:21,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,709 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2022-02-20 19:37:21,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 19:37:21,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 19:37:21,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 19:37:21,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 19:37:21,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 19:37:21,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 19:37:21,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 19:37:21,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 19:37:21,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (1/1) ... [2022-02-20 19:37:21,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:37:21,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:37:21,776 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) [2022-02-20 19:37:21,795 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 [2022-02-20 19:37:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 19:37:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-02-20 19:37:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-02-20 19:37:21,808 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-02-20 19:37:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-02-20 19:37:21,808 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-02-20 19:37:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 19:37:21,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 19:37:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-20 19:37:21,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-20 19:37:21,859 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 19:37:21,860 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 19:37:30,976 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 19:37:30,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 19:37:30,981 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 19:37:30,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:37:30 BoogieIcfgContainer [2022-02-20 19:37:30,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 19:37:30,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 19:37:30,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 19:37:30,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 19:37:30,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 07:37:21" (1/3) ... [2022-02-20 19:37:30,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b04141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:37:30, skipping insertion in model container [2022-02-20 19:37:30,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:37:21" (2/3) ... [2022-02-20 19:37:30,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b04141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:37:30, skipping insertion in model container [2022-02-20 19:37:30,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:37:30" (3/3) ... [2022-02-20 19:37:30,987 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_7.i [2022-02-20 19:37:30,990 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 19:37:30,990 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-20 19:37:31,029 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 19:37:31,033 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-20 19:37:31,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-20 19:37:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-20 19:37:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-20 19:37:31,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:37:31,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:37:31,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:37:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:37:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-02-20 19:37:31,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 19:37:31,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598590170] [2022-02-20 19:37:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:37:31,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 19:37:31,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 19:37:31,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-02-20 19:37:31,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-02-20 19:37:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:37:31,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-20 19:37:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:37:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:37:31,316 INFO L290 TraceCheckUtils]: 0: Hoare triple {46#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0bv32, 0bv32;assume 0bv1 == #valid[0bv32];assume ~bvult32(0bv32, #StackHeapBarrier);currentRoundingMode := ~roundNearestTiesToEven;call #Ultimate.allocInit(2bv32, 1bv32);call write~init~intINTTYPE1(48bv8, 1bv32, 0bv32, 1bv32);call write~init~intINTTYPE1(0bv8, 1bv32, 1bv32, 1bv32);call #Ultimate.allocInit(8bv32, 2bv32);call #Ultimate.allocInit(12bv32, 3bv32); {46#true} is VALID [2022-02-20 19:37:31,316 INFO L290 TraceCheckUtils]: 1: Hoare triple {46#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1; {46#true} is VALID [2022-02-20 19:37:31,317 INFO L290 TraceCheckUtils]: 2: Hoare triple {46#true} assume 0bv32 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63bv32;main1_~y~0#1 := 18bv32;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {57#(= (_ bv63 32) |ULTIMATE.start_gcd_test_~a#1|)} is VALID [2022-02-20 19:37:31,318 INFO L290 TraceCheckUtils]: 3: Hoare triple {57#(= (_ bv63 32) |ULTIMATE.start_gcd_test_~a#1|)} assume ~bvslt32(gcd_test_~a#1, 0bv32);gcd_test_~a#1 := ~bvneg32(gcd_test_~a#1); {47#false} is VALID [2022-02-20 19:37:31,318 INFO L290 TraceCheckUtils]: 4: Hoare triple {47#false} assume ~bvslt32(gcd_test_~b#1, 0bv32);gcd_test_~b#1 := ~bvneg32(gcd_test_~b#1); {47#false} is VALID [2022-02-20 19:37:31,318 INFO L290 TraceCheckUtils]: 5: Hoare triple {47#false} assume 0bv32 == gcd_test_~a#1;gcd_test_#res#1 := gcd_test_~b#1; {47#false} is VALID [2022-02-20 19:37:31,318 INFO L290 TraceCheckUtils]: 6: Hoare triple {47#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {47#false} is VALID [2022-02-20 19:37:31,318 INFO L272 TraceCheckUtils]: 7: Hoare triple {47#false} call __VERIFIER_assert((if 0bv32 == ~bvsrem32(main1_~x~0#1, main1_~g~0#1) then 1bv32 else 0bv32)); {47#false} is VALID [2022-02-20 19:37:31,318 INFO L290 TraceCheckUtils]: 8: Hoare triple {47#false} ~cond := #in~cond; {47#false} is VALID [2022-02-20 19:37:31,318 INFO L290 TraceCheckUtils]: 9: Hoare triple {47#false} assume 0bv32 == ~cond; {47#false} is VALID [2022-02-20 19:37:31,319 INFO L290 TraceCheckUtils]: 10: Hoare triple {47#false} assume !false; {47#false} is VALID [2022-02-20 19:37:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:37:31,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 19:37:31,320 INFO L144 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-02-20 19:37:31,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598590170] [2022-02-20 19:37:31,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598590170] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:37:31,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:37:31,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 19:37:31,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984121800] [2022-02-20 19:37:31,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:37:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-20 19:37:31,335 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:37:31,337 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:31,361 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:37:31,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 19:37:31,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-02-20 19:37:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 19:37:31,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:37:31,376 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:49,880 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-02-20 19:37:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 19:37:49,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-20 19:37:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:37:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2022-02-20 19:37:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2022-02-20 19:37:49,909 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 127 transitions. [2022-02-20 19:37:54,821 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 127 edges. 127 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:37:54,828 INFO L225 Difference]: With dead ends: 93 [2022-02-20 19:37:54,831 INFO L226 Difference]: Without dead ends: 43 [2022-02-20 19:37:54,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:37:54,836 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-20 19:37:54,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-20 19:37:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-20 19:37:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-02-20 19:37:54,870 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:37:54,870 INFO L82 GeneralOperation]: Start isEquivalent. First operand 43 states. Second operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:37:54,871 INFO L74 IsIncluded]: Start isIncluded. First operand 43 states. Second operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:37:54,872 INFO L87 Difference]: Start difference. First operand 43 states. Second operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:37:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:54,876 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-20 19:37:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-20 19:37:54,877 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:37:54,877 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:37:54,877 INFO L74 IsIncluded]: Start isIncluded. First operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 43 states. [2022-02-20 19:37:54,878 INFO L87 Difference]: Start difference. First operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 43 states. [2022-02-20 19:37:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:54,882 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-20 19:37:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-20 19:37:54,882 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:37:54,882 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:37:54,883 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:37:54,883 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:37:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 19:37:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-02-20 19:37:54,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-02-20 19:37:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:37:54,886 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-02-20 19:37:54,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-02-20 19:37:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-20 19:37:54,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:37:54,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:37:54,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-02-20 19:37:55,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-02-20 19:37:55,101 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:37:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:37:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-02-20 19:37:55,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 19:37:55,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209754666] [2022-02-20 19:37:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:37:55,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 19:37:55,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 19:37:55,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-02-20 19:37:55,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-02-20 19:37:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:37:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-20 19:37:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:37:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:37:55,297 INFO L290 TraceCheckUtils]: 0: Hoare triple {342#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0bv32, 0bv32;assume 0bv1 == #valid[0bv32];assume ~bvult32(0bv32, #StackHeapBarrier);currentRoundingMode := ~roundNearestTiesToEven;call #Ultimate.allocInit(2bv32, 1bv32);call write~init~intINTTYPE1(48bv8, 1bv32, 0bv32, 1bv32);call write~init~intINTTYPE1(0bv8, 1bv32, 1bv32, 1bv32);call #Ultimate.allocInit(8bv32, 2bv32);call #Ultimate.allocInit(12bv32, 3bv32); {342#true} is VALID [2022-02-20 19:37:55,298 INFO L290 TraceCheckUtils]: 1: Hoare triple {342#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet11#1, main_#t~ret12#1, main_#t~ret13#1; {342#true} is VALID [2022-02-20 19:37:55,298 INFO L290 TraceCheckUtils]: 2: Hoare triple {342#true} assume 0bv32 != main_#t~nondet11#1;havoc main_#t~nondet11#1;assume { :begin_inline_main1 } true;havoc main1_#res#1;havoc main1_#t~ret5#1, main1_~x~0#1, main1_~y~0#1, main1_~g~0#1;havoc main1_~x~0#1;havoc main1_~y~0#1;havoc main1_~g~0#1;main1_~x~0#1 := 63bv32;main1_~y~0#1 := 18bv32;assume { :begin_inline_gcd_test } true;gcd_test_#in~a#1, gcd_test_#in~b#1 := main1_~x~0#1, main1_~y~0#1;havoc gcd_test_#res#1;havoc gcd_test_~a#1, gcd_test_~b#1;gcd_test_~a#1 := gcd_test_#in~a#1;gcd_test_~b#1 := gcd_test_#in~b#1; {353#(= (_ bv18 32) |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:37:55,299 INFO L290 TraceCheckUtils]: 3: Hoare triple {353#(= (_ bv18 32) |ULTIMATE.start_gcd_test_~b#1|)} assume !~bvslt32(gcd_test_~a#1, 0bv32); {353#(= (_ bv18 32) |ULTIMATE.start_gcd_test_~b#1|)} is VALID [2022-02-20 19:37:55,299 INFO L290 TraceCheckUtils]: 4: Hoare triple {353#(= (_ bv18 32) |ULTIMATE.start_gcd_test_~b#1|)} assume ~bvslt32(gcd_test_~b#1, 0bv32);gcd_test_~b#1 := ~bvneg32(gcd_test_~b#1); {343#false} is VALID [2022-02-20 19:37:55,299 INFO L290 TraceCheckUtils]: 5: Hoare triple {343#false} assume !(0bv32 == gcd_test_~a#1); {343#false} is VALID [2022-02-20 19:37:55,300 INFO L290 TraceCheckUtils]: 6: Hoare triple {343#false} assume !(0bv32 != gcd_test_~b#1); {343#false} is VALID [2022-02-20 19:37:55,300 INFO L290 TraceCheckUtils]: 7: Hoare triple {343#false} gcd_test_#res#1 := gcd_test_~a#1; {343#false} is VALID [2022-02-20 19:37:55,300 INFO L290 TraceCheckUtils]: 8: Hoare triple {343#false} main1_#t~ret5#1 := gcd_test_#res#1;assume { :end_inline_gcd_test } true;main1_~g~0#1 := main1_#t~ret5#1;havoc main1_#t~ret5#1; {343#false} is VALID [2022-02-20 19:37:55,300 INFO L272 TraceCheckUtils]: 9: Hoare triple {343#false} call __VERIFIER_assert((if 0bv32 == ~bvsrem32(main1_~x~0#1, main1_~g~0#1) then 1bv32 else 0bv32)); {343#false} is VALID [2022-02-20 19:37:55,300 INFO L290 TraceCheckUtils]: 10: Hoare triple {343#false} ~cond := #in~cond; {343#false} is VALID [2022-02-20 19:37:55,300 INFO L290 TraceCheckUtils]: 11: Hoare triple {343#false} assume 0bv32 == ~cond; {343#false} is VALID [2022-02-20 19:37:55,300 INFO L290 TraceCheckUtils]: 12: Hoare triple {343#false} assume !false; {343#false} is VALID [2022-02-20 19:37:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:37:55,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 19:37:55,301 INFO L144 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-02-20 19:37:55,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209754666] [2022-02-20 19:37:55,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209754666] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:37:55,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:37:55,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 19:37:55,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51552934] [2022-02-20 19:37:55,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:37:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-20 19:37:55,302 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:37:55,302 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-20 19:37:55,324 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 13 edges. 13 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 19:37:55,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 19:37:55,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-02-20 19:37:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 19:37:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:37:55,325 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)