./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_2_2.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_2.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 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 19:36:09,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 19:36:09,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 19:36:09,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 19:36:09,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 19:36:09,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 19:36:09,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 19:36:09,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 19:36:09,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 19:36:09,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 19:36:09,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 19:36:09,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 19:36:09,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 19:36:09,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 19:36:09,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 19:36:09,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 19:36:09,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 19:36:09,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 19:36:09,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 19:36:09,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 19:36:09,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 19:36:09,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 19:36:09,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 19:36:09,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 19:36:09,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 19:36:09,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 19:36:09,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 19:36:09,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 19:36:09,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 19:36:09,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 19:36:09,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 19:36:09,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 19:36:09,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 19:36:09,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 19:36:09,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 19:36:09,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 19:36:09,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 19:36:09,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 19:36:09,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 19:36:09,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 19:36:09,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 19:36:09,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-20 19:36:09,854 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 19:36:09,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 19:36:09,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 19:36:09,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 19:36:09,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 19:36:09,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 19:36:09,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 19:36:09,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 19:36:09,856 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 19:36:09,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 19:36:09,857 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 19:36:09,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 19:36:09,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 19:36:09,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 19:36:09,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 19:36:09,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 19:36:09,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 19:36:09,858 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 19:36:09,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 19:36:09,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 19:36:09,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 19:36:09,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 19:36:09,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 19:36:09,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 19:36:09,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:36:09,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 19:36:09,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 19:36:09,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 19:36:09,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 19:36:09,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 19:36:09,860 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 19:36:09,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 19:36:09,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 19:36:09,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 [2022-02-20 19:36:10,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 19:36:10,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 19:36:10,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 19:36:10,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 19:36:10,096 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 19:36:10,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2022-02-20 19:36:10,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d45de98c/6db53277931e487892301ac3506d8f3f/FLAG96abbf319 [2022-02-20 19:36:10,524 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 19:36:10,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2022-02-20 19:36:10,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d45de98c/6db53277931e487892301ac3506d8f3f/FLAG96abbf319 [2022-02-20 19:36:10,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d45de98c/6db53277931e487892301ac3506d8f3f [2022-02-20 19:36:10,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 19:36:10,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 19:36:10,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 19:36:10,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 19:36:10,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 19:36:10,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b66e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10, skipping insertion in model container [2022-02-20 19:36:10,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 19:36:10,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 19:36:10,749 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_2.i[1224,1237] [2022-02-20 19:36:10,791 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_2.i[2827,2840] [2022-02-20 19:36:10,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:36:10,800 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 19:36:10,811 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_2.i[1224,1237] [2022-02-20 19:36:10,821 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_2.i[2827,2840] [2022-02-20 19:36:10,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:36:10,836 INFO L208 MainTranslator]: Completed translation [2022-02-20 19:36:10,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10 WrapperNode [2022-02-20 19:36:10,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 19:36:10,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 19:36:10,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 19:36:10,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 19:36:10,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,884 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 72 [2022-02-20 19:36:10,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 19:36:10,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 19:36:10,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 19:36:10,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 19:36:10,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 19:36:10,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 19:36:10,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 19:36:10,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 19:36:10,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (1/1) ... [2022-02-20 19:36:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:36:10,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:10,927 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 19:36:10,932 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 19:36:10,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 19:36:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-02-20 19:36:10,956 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-02-20 19:36:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-02-20 19:36:10,956 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-02-20 19:36:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-20 19:36:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 19:36:10,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 19:36:10,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-20 19:36:10,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-20 19:36:11,004 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 19:36:11,005 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 19:36:11,206 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 19:36:11,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 19:36:11,214 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 19:36:11,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:36:11 BoogieIcfgContainer [2022-02-20 19:36:11,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 19:36:11,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 19:36:11,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 19:36:11,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 19:36:11,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 07:36:10" (1/3) ... [2022-02-20 19:36:11,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3232a57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:36:11, skipping insertion in model container [2022-02-20 19:36:11,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:10" (2/3) ... [2022-02-20 19:36:11,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3232a57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:36:11, skipping insertion in model container [2022-02-20 19:36:11,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:36:11" (3/3) ... [2022-02-20 19:36:11,222 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_2.i [2022-02-20 19:36:11,228 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 19:36:11,229 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-20 19:36:11,265 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 19:36:11,276 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 19:36:11,276 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-20 19:36:11,291 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 19:36:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-20 19:36:11,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:11,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:11,295 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:11,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-02-20 19:36:11,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:11,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966615833] [2022-02-20 19:36:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:11,502 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 19:36:11,503 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 19:36:11,505 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 19:36:11,506 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 19:36:11,506 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 19:36:11,507 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 19:36:11,507 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 19:36:11,508 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 19:36:11,508 INFO L290 TraceCheckUtils]: 8: Hoare triple {47#false} ~cond := #in~cond; {47#false} is VALID [2022-02-20 19:36:11,508 INFO L290 TraceCheckUtils]: 9: Hoare triple {47#false} assume 0 == ~cond; {47#false} is VALID [2022-02-20 19:36:11,509 INFO L290 TraceCheckUtils]: 10: Hoare triple {47#false} assume !false; {47#false} is VALID [2022-02-20 19:36:11,510 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 19:36:11,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:11,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966615833] [2022-02-20 19:36:11,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966615833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:36:11,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:36:11,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 19:36:11,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232763156] [2022-02-20 19:36:11,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:36:11,517 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 19:36:11,518 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:11,520 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 19:36:11,532 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 19:36:11,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 19:36:11,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 19:36:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:36:11,551 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 19:36:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:11,725 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-02-20 19:36:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 19:36:11,726 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 19:36:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:11,727 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 19:36:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2022-02-20 19:36:11,736 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 19:36:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2022-02-20 19:36:11,741 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 127 transitions. [2022-02-20 19:36:11,900 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 19:36:11,908 INFO L225 Difference]: With dead ends: 93 [2022-02-20 19:36:11,908 INFO L226 Difference]: Without dead ends: 43 [2022-02-20 19:36:11,910 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 19:36:11,912 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 19:36:11,913 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 19:36:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-20 19:36:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-02-20 19:36:11,945 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:11,946 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 19:36:11,947 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 19:36:11,948 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 19:36:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:11,955 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-20 19:36:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-20 19:36:11,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:11,956 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:11,957 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 19:36:11,958 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 19:36:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:11,963 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-20 19:36:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-20 19:36:11,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:11,964 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:11,964 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:11,964 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:11,965 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 19:36:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-02-20 19:36:11,969 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-02-20 19:36:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:11,969 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-02-20 19:36:11,969 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 19:36:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-02-20 19:36:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-20 19:36:11,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:11,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:11,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-20 19:36:11,974 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-02-20 19:36:11,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:11,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147474233] [2022-02-20 19:36:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:12,019 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 19:36:12,020 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 19:36:12,020 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 19:36:12,020 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 19:36:12,021 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 19:36:12,021 INFO L290 TraceCheckUtils]: 5: Hoare triple {313#false} assume !(0 == gcd_test_~a#1); {313#false} is VALID [2022-02-20 19:36:12,021 INFO L290 TraceCheckUtils]: 6: Hoare triple {313#false} assume !(0 != gcd_test_~b#1); {313#false} is VALID [2022-02-20 19:36:12,021 INFO L290 TraceCheckUtils]: 7: Hoare triple {313#false} gcd_test_#res#1 := gcd_test_~a#1; {313#false} is VALID [2022-02-20 19:36:12,021 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 19:36:12,021 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 19:36:12,022 INFO L290 TraceCheckUtils]: 10: Hoare triple {313#false} ~cond := #in~cond; {313#false} is VALID [2022-02-20 19:36:12,022 INFO L290 TraceCheckUtils]: 11: Hoare triple {313#false} assume 0 == ~cond; {313#false} is VALID [2022-02-20 19:36:12,022 INFO L290 TraceCheckUtils]: 12: Hoare triple {313#false} assume !false; {313#false} is VALID [2022-02-20 19:36:12,022 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 19:36:12,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:12,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147474233] [2022-02-20 19:36:12,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147474233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:36:12,022 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:36:12,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 19:36:12,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541691411] [2022-02-20 19:36:12,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:36:12,024 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 19:36:12,024 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:12,024 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 19:36:12,032 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 19:36:12,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 19:36:12,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 19:36:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:36:12,033 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 19:36:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:12,089 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-02-20 19:36:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 19:36:12,089 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 19:36:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:12,089 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 19:36:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2022-02-20 19:36:12,091 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 19:36:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2022-02-20 19:36:12,093 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 63 transitions. [2022-02-20 19:36:12,136 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 19:36:12,137 INFO L225 Difference]: With dead ends: 52 [2022-02-20 19:36:12,137 INFO L226 Difference]: Without dead ends: 38 [2022-02-20 19:36:12,138 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 19:36:12,139 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 19:36:12,139 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 19:36:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-20 19:36:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-20 19:36:12,142 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:12,143 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 19:36:12,143 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 19:36:12,143 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 19:36:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:12,145 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-02-20 19:36:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-02-20 19:36:12,146 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:12,146 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:12,146 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 19:36:12,146 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 19:36:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:12,149 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-02-20 19:36:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-02-20 19:36:12,149 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:12,149 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:12,149 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:12,150 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:12,150 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 19:36:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-02-20 19:36:12,151 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-02-20 19:36:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:12,152 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-02-20 19:36:12,152 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 19:36:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-02-20 19:36:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-20 19:36:12,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:12,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:12,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-20 19:36:12,164 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-02-20 19:36:12,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:12,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111424591] [2022-02-20 19:36:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:12,180 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 19:36:12,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205690110] [2022-02-20 19:36:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:12,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:36:12,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:12,185 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 19:36:12,186 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 19:36:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:12,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-20 19:36:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:12,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:36:12,417 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 19:36:12,418 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 19:36:12,418 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 19:36:12,419 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 19:36:12,419 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 19:36:12,420 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 19:36:12,420 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 19:36:12,421 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 19:36:12,421 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 19:36:12,421 INFO L290 TraceCheckUtils]: 9: Hoare triple {516#false} gcd_test_#res#1 := gcd_test_~a#1; {516#false} is VALID [2022-02-20 19:36:12,421 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 19:36:12,422 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 19:36:12,422 INFO L290 TraceCheckUtils]: 12: Hoare triple {516#false} ~cond := #in~cond; {516#false} is VALID [2022-02-20 19:36:12,422 INFO L290 TraceCheckUtils]: 13: Hoare triple {516#false} assume 0 == ~cond; {516#false} is VALID [2022-02-20 19:36:12,422 INFO L290 TraceCheckUtils]: 14: Hoare triple {516#false} assume !false; {516#false} is VALID [2022-02-20 19:36:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-20 19:36:12,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-20 19:36:12,545 INFO L290 TraceCheckUtils]: 14: Hoare triple {516#false} assume !false; {516#false} is VALID [2022-02-20 19:36:12,545 INFO L290 TraceCheckUtils]: 13: Hoare triple {516#false} assume 0 == ~cond; {516#false} is VALID [2022-02-20 19:36:12,545 INFO L290 TraceCheckUtils]: 12: Hoare triple {516#false} ~cond := #in~cond; {516#false} is VALID [2022-02-20 19:36:12,546 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 19:36:12,559 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 19:36:12,559 INFO L290 TraceCheckUtils]: 9: Hoare triple {516#false} gcd_test_#res#1 := gcd_test_~a#1; {516#false} is VALID [2022-02-20 19:36:12,560 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 19:36:12,561 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 19:36:12,561 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 19:36:12,561 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 19:36:12,562 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 19:36:12,562 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 19:36:12,565 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 19:36:12,565 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 19:36:12,565 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 19:36:12,565 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 19:36:12,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:12,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111424591] [2022-02-20 19:36:12,565 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 19:36:12,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205690110] [2022-02-20 19:36:12,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205690110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-20 19:36:12,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-20 19:36:12,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-02-20 19:36:12,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033657906] [2022-02-20 19:36:12,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-20 19:36:12,566 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 19:36:12,567 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:12,567 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 19:36:12,583 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 19:36:12,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-20 19:36:12,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-20 19:36:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-20 19:36:12,584 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 19:36:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:12,678 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-02-20 19:36:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-20 19:36:12,678 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 19:36:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:12,678 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 19:36:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-02-20 19:36:12,680 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 19:36:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2022-02-20 19:36:12,681 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 63 transitions. [2022-02-20 19:36:12,726 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 19:36:12,728 INFO L225 Difference]: With dead ends: 55 [2022-02-20 19:36:12,728 INFO L226 Difference]: Without dead ends: 42 [2022-02-20 19:36:12,728 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 19:36:12,731 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 19:36:12,731 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 19:36:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-20 19:36:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-20 19:36:12,741 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:12,741 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 19:36:12,741 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 19:36:12,742 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 19:36:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:12,745 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-02-20 19:36:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-02-20 19:36:12,748 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:12,748 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:12,748 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 19:36:12,749 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 19:36:12,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:12,751 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-02-20 19:36:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-02-20 19:36:12,752 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:12,752 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:12,752 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:12,752 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:12,752 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 19:36:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-02-20 19:36:12,754 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2022-02-20 19:36:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:12,755 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-02-20 19:36:12,755 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 19:36:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-02-20 19:36:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-20 19:36:12,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:12,758 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:12,777 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 19:36:12,971 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 19:36:12,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1992731711, now seen corresponding path program 1 times [2022-02-20 19:36:12,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:12,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767524942] [2022-02-20 19:36:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:12,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:12,987 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 19:36:12,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388349273] [2022-02-20 19:36:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:12,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:36:12,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:12,989 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 19:36:13,000 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 19:36:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:13,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-20 19:36:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:13,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:36:13,414 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 19:36:13,414 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 19:36:13,416 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 19:36:13,417 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 19:36:13,417 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 19:36:13,417 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 19:36:13,418 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 19:36:13,418 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 19:36:13,419 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 19:36:13,419 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 19:36:13,420 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 19:36:13,420 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 19:36:13,421 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 19:36:13,421 INFO L290 TraceCheckUtils]: 13: Hoare triple {825#false} gcd_test_#res#1 := gcd_test_~a#1; {825#false} is VALID [2022-02-20 19:36:13,421 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 19:36:13,421 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 19:36:13,421 INFO L290 TraceCheckUtils]: 16: Hoare triple {825#false} ~cond := #in~cond; {825#false} is VALID [2022-02-20 19:36:13,421 INFO L290 TraceCheckUtils]: 17: Hoare triple {825#false} assume 0 == ~cond; {825#false} is VALID [2022-02-20 19:36:13,421 INFO L290 TraceCheckUtils]: 18: Hoare triple {825#false} assume !false; {825#false} is VALID [2022-02-20 19:36:13,421 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 19:36:13,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-20 19:36:13,555 INFO L290 TraceCheckUtils]: 18: Hoare triple {825#false} assume !false; {825#false} is VALID [2022-02-20 19:36:13,556 INFO L290 TraceCheckUtils]: 17: Hoare triple {825#false} assume 0 == ~cond; {825#false} is VALID [2022-02-20 19:36:13,556 INFO L290 TraceCheckUtils]: 16: Hoare triple {825#false} ~cond := #in~cond; {825#false} is VALID [2022-02-20 19:36:13,556 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 19:36:13,556 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 19:36:13,556 INFO L290 TraceCheckUtils]: 13: Hoare triple {825#false} gcd_test_#res#1 := gcd_test_~a#1; {825#false} is VALID [2022-02-20 19:36:13,561 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 19:36:13,562 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 19:36:13,562 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 19:36:13,563 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 19:36:13,563 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 19:36:13,564 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 19:36:13,564 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 19:36:13,565 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 19:36:13,565 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 19:36:13,565 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 19:36:13,566 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 19:36:13,566 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 19:36:13,566 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 19:36:13,566 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 19:36:13,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:13,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767524942] [2022-02-20 19:36:13,567 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 19:36:13,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388349273] [2022-02-20 19:36:13,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388349273] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-20 19:36:13,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-20 19:36:13,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-20 19:36:13,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366324869] [2022-02-20 19:36:13,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-20 19:36:13,568 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 19:36:13,568 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:13,568 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 19:36:13,590 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 19:36:13,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-20 19:36:13,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-20 19:36:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-20 19:36:13,592 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 19:36:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:13,817 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-02-20 19:36:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-20 19:36:13,817 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 19:36:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:13,817 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 19:36:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2022-02-20 19:36:13,818 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 19:36:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2022-02-20 19:36:13,819 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 64 transitions. [2022-02-20 19:36:13,869 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 19:36:13,871 INFO L225 Difference]: With dead ends: 57 [2022-02-20 19:36:13,871 INFO L226 Difference]: Without dead ends: 44 [2022-02-20 19:36:13,871 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 19:36:13,873 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 19:36:13,875 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 19:36:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-20 19:36:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-20 19:36:13,885 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:13,886 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 19:36:13,886 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 19:36:13,886 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 19:36:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:13,889 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-02-20 19:36:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-02-20 19:36:13,889 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:13,889 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:13,889 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 19:36:13,889 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 19:36:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:13,891 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-02-20 19:36:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-02-20 19:36:13,891 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:13,891 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:13,891 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:13,891 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:13,891 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 19:36:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-02-20 19:36:13,893 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2022-02-20 19:36:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:13,893 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-02-20 19:36:13,893 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 19:36:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-02-20 19:36:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-20 19:36:13,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:13,894 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:13,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-20 19:36:14,105 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 19:36:14,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:14,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:14,108 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2022-02-20 19:36:14,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:14,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303386869] [2022-02-20 19:36:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:14,126 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-20 19:36:14,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328386222] [2022-02-20 19:36:14,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-20 19:36:14,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-20 19:36:14,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:14,127 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 19:36:14,129 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 19:36:14,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-20 19:36:14,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-20 19:36:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-20 19:36:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:14,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:36:46,598 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 19:36:46,598 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 19:36:46,599 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 19:36:46,599 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 19:36:46,599 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 19:36:46,600 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 19:36:46,600 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 19:36:46,601 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 19:36:46,601 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 19:36:46,602 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 19:36:46,602 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 19:36:46,603 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 19:36:46,603 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 19:36:46,604 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 19:36:46,604 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 19:36:46,605 INFO L290 TraceCheckUtils]: 15: Hoare triple {1176#false} gcd_test_#res#1 := gcd_test_~a#1; {1176#false} is VALID [2022-02-20 19:36:46,605 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 19:36:46,605 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 19:36:46,605 INFO L290 TraceCheckUtils]: 18: Hoare triple {1176#false} ~cond := #in~cond; {1176#false} is VALID [2022-02-20 19:36:46,605 INFO L290 TraceCheckUtils]: 19: Hoare triple {1176#false} assume 0 == ~cond; {1176#false} is VALID [2022-02-20 19:36:46,605 INFO L290 TraceCheckUtils]: 20: Hoare triple {1176#false} assume !false; {1176#false} is VALID [2022-02-20 19:36:46,605 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 19:36:46,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-20 19:36:46,771 INFO L290 TraceCheckUtils]: 20: Hoare triple {1176#false} assume !false; {1176#false} is VALID [2022-02-20 19:36:46,772 INFO L290 TraceCheckUtils]: 19: Hoare triple {1176#false} assume 0 == ~cond; {1176#false} is VALID [2022-02-20 19:36:46,772 INFO L290 TraceCheckUtils]: 18: Hoare triple {1176#false} ~cond := #in~cond; {1176#false} is VALID [2022-02-20 19:36:46,772 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 19:36:46,772 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 19:36:46,772 INFO L290 TraceCheckUtils]: 15: Hoare triple {1176#false} gcd_test_#res#1 := gcd_test_~a#1; {1176#false} is VALID [2022-02-20 19:36:46,774 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 19:36:46,783 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 19:36:46,783 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 19:36:46,784 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 19:36:46,784 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 19:36:46,785 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 19:36:46,785 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 19:36:46,786 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 19:36:46,786 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 19:36:46,787 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 19:36:46,787 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 19:36:46,787 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 19:36:46,788 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 19:36:46,788 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 19:36:46,788 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 19:36:46,788 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 19:36:46,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-20 19:36:46,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303386869] [2022-02-20 19:36:46,788 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-20 19:36:46,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328386222] [2022-02-20 19:36:46,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328386222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-20 19:36:46,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-20 19:36:46,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-20 19:36:46,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930342223] [2022-02-20 19:36:46,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-20 19:36:46,789 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 19:36:46,789 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:46,789 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 19:36:46,824 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 19:36:46,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-20 19:36:46,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-20 19:36:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-20 19:36:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-02-20 19:36:46,825 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 19:36:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:47,183 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2022-02-20 19:36:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-20 19:36:47,183 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 19:36:47,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:36:47,184 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 19:36:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2022-02-20 19:36:47,185 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 19:36:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2022-02-20 19:36:47,187 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 9 states and 78 transitions. [2022-02-20 19:36:47,249 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 19:36:47,250 INFO L225 Difference]: With dead ends: 65 [2022-02-20 19:36:47,250 INFO L226 Difference]: Without dead ends: 50 [2022-02-20 19:36:47,250 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 19:36:47,251 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 19:36:47,251 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 19:36:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-20 19:36:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-20 19:36:47,270 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:36:47,270 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 19:36:47,270 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 19:36:47,271 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 19:36:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:47,272 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-02-20 19:36:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-02-20 19:36:47,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:47,273 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:47,273 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 19:36:47,274 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 19:36:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:36:47,275 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-02-20 19:36:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-02-20 19:36:47,276 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:36:47,276 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:36:47,276 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:36:47,276 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:36:47,277 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 19:36:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-02-20 19:36:47,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2022-02-20 19:36:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:36:47,281 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-02-20 19:36:47,281 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 19:36:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-02-20 19:36:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-20 19:36:47,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:47,282 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 19:36:47,311 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 19:36:47,499 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 19:36:47,500 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-02-20 19:36:47,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-20 19:36:47,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208183128] [2022-02-20 19:36:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:47,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-20 19:36:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 19:36:47,518 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-20 19:36:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-20 19:36:47,538 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-20 19:36:47,540 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-20 19:36:47,541 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-02-20 19:36:47,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-02-20 19:36:47,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-20 19:36:47,548 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-02-20 19:36:47,550 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-20 19:36:47,563 FATAL L489 DefaultTranslator]: Callstack has procedure call flag but succeeding procedure is empty at [CALL] call #t~ret7 := f(~IN~0); [2022-02-20 19:36:47,564 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 19:36:47,569 INFO L158 Benchmark]: Toolchain (without parser) took 37022.58ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 77.0MB in the beginning and 93.6MB in the end (delta: -16.7MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. [2022-02-20 19:36:47,570 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 104.9MB. Free memory is still 61.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 19:36:47,571 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.05ms. Allocated memory is still 104.9MB. Free memory was 76.7MB in the beginning and 76.8MB in the end (delta: -42.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-20 19:36:47,572 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.53ms. Allocated memory is still 104.9MB. Free memory was 76.8MB in the beginning and 74.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-02-20 19:36:47,572 INFO L158 Benchmark]: Boogie Preprocessor took 18.83ms. Allocated memory is still 104.9MB. Free memory was 74.8MB in the beginning and 73.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-02-20 19:36:47,572 INFO L158 Benchmark]: RCFGBuilder took 310.76ms. Allocated memory is still 104.9MB. Free memory was 73.5MB in the beginning and 60.5MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-02-20 19:36:47,573 INFO L158 Benchmark]: TraceAbstraction took 36352.08ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 60.1MB in the beginning and 93.6MB in the end (delta: -33.5MB). Peak memory consumption was 536.7kB. Max. memory is 16.1GB. [2022-02-20 19:36:47,576 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 0.15ms. Allocated memory is still 104.9MB. Free memory is still 61.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.05ms. Allocated memory is still 104.9MB. Free memory was 76.7MB in the beginning and 76.8MB in the end (delta: -42.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.53ms. Allocated memory is still 104.9MB. Free memory was 76.8MB in the beginning and 74.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.83ms. Allocated memory is still 104.9MB. Free memory was 74.8MB in the beginning and 73.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 310.76ms. Allocated memory is still 104.9MB. Free memory was 73.5MB in the beginning and 60.5MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 36352.08ms. Allocated memory was 104.9MB in the beginning and 136.3MB in the end (delta: 31.5MB). Free memory was 60.1MB in the beginning and 93.6MB in the end (delta: -33.5MB). Peak memory consumption was 536.7kB. 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 19:36:47,604 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_2.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 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 19:36:49,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 19:36:49,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 19:36:49,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 19:36:49,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 19:36:49,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 19:36:49,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 19:36:49,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 19:36:49,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 19:36:49,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 19:36:49,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 19:36:49,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 19:36:49,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 19:36:49,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 19:36:49,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 19:36:49,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 19:36:49,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 19:36:49,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 19:36:49,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 19:36:49,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 19:36:49,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 19:36:49,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 19:36:49,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 19:36:49,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 19:36:49,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 19:36:49,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 19:36:49,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 19:36:49,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 19:36:49,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 19:36:49,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 19:36:49,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 19:36:49,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 19:36:49,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 19:36:49,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 19:36:49,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 19:36:49,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 19:36:49,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 19:36:49,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 19:36:49,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 19:36:49,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 19:36:49,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 19:36:49,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-02-20 19:36:49,335 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 19:36:49,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 19:36:49,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 19:36:49,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 19:36:49,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 19:36:49,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 19:36:49,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 19:36:49,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 19:36:49,339 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 19:36:49,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 19:36:49,340 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 19:36:49,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 19:36:49,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 19:36:49,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 19:36:49,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 19:36:49,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 19:36:49,341 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-02-20 19:36:49,341 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-02-20 19:36:49,341 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-02-20 19:36:49,341 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 19:36:49,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 19:36:49,341 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 19:36:49,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 19:36:49,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 19:36:49,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 19:36:49,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 19:36:49,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:36:49,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 19:36:49,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 19:36:49,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 19:36:49,343 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-02-20 19:36:49,343 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-02-20 19:36:49,343 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 19:36:49,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 19:36:49,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 19:36:49,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-20 19:36:49,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 [2022-02-20 19:36:49,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 19:36:49,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 19:36:49,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 19:36:49,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 19:36:49,620 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 19:36:49,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2022-02-20 19:36:49,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b49a6dc6/8a9d3d39516346b3960b2b9a438a4a6d/FLAG6414ebf63 [2022-02-20 19:36:49,993 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 19:36:49,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2022-02-20 19:36:50,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b49a6dc6/8a9d3d39516346b3960b2b9a438a4a6d/FLAG6414ebf63 [2022-02-20 19:36:50,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b49a6dc6/8a9d3d39516346b3960b2b9a438a4a6d [2022-02-20 19:36:50,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 19:36:50,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 19:36:50,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 19:36:50,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 19:36:50,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 19:36:50,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50, skipping insertion in model container [2022-02-20 19:36:50,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 19:36:50,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 19:36:50,138 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_2.i[1224,1237] [2022-02-20 19:36:50,157 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_2.i[2827,2840] [2022-02-20 19:36:50,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:36:50,167 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 19:36:50,207 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_2.i[1224,1237] [2022-02-20 19:36:50,235 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_2.i[2827,2840] [2022-02-20 19:36:50,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 19:36:50,256 INFO L208 MainTranslator]: Completed translation [2022-02-20 19:36:50,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50 WrapperNode [2022-02-20 19:36:50,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 19:36:50,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 19:36:50,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 19:36:50,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 19:36:50,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,305 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2022-02-20 19:36:50,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 19:36:50,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 19:36:50,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 19:36:50,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 19:36:50,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 19:36:50,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 19:36:50,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 19:36:50,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 19:36:50,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (1/1) ... [2022-02-20 19:36:50,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 19:36:50,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 19:36:50,393 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 19:36:50,415 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 19:36:50,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 19:36:50,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-02-20 19:36:50,424 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-02-20 19:36:50,424 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-02-20 19:36:50,424 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-02-20 19:36:50,425 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-02-20 19:36:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 19:36:50,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 19:36:50,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-20 19:36:50,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-20 19:36:50,484 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 19:36:50,485 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 19:36:56,644 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 19:36:56,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 19:36:56,649 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 19:36:56,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:36:56 BoogieIcfgContainer [2022-02-20 19:36:56,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 19:36:56,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 19:36:56,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 19:36:56,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 19:36:56,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 07:36:50" (1/3) ... [2022-02-20 19:36:56,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cafaa77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:36:56, skipping insertion in model container [2022-02-20 19:36:56,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 07:36:50" (2/3) ... [2022-02-20 19:36:56,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cafaa77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 07:36:56, skipping insertion in model container [2022-02-20 19:36:56,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 07:36:56" (3/3) ... [2022-02-20 19:36:56,655 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_2.i [2022-02-20 19:36:56,659 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 19:36:56,659 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-02-20 19:36:56,689 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 19:36:56,694 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 19:36:56,694 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-20 19:36:56,712 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 19:36:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-20 19:36:56,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:36:56,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:36:56,717 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:36:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:36:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-02-20 19:36:56,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 19:36:56,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850426051] [2022-02-20 19:36:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:36:56,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 19:36:56,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 19:36:56,736 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 19:36:56,738 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 19:36:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-20 19:36:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:36:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:36:57,070 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 19:36:57,071 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 19:36:57,072 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 19:36:57,079 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 19:36:57,079 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 19:36:57,080 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 19:36:57,080 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 19:36:57,080 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 19:36:57,080 INFO L290 TraceCheckUtils]: 8: Hoare triple {47#false} ~cond := #in~cond; {47#false} is VALID [2022-02-20 19:36:57,081 INFO L290 TraceCheckUtils]: 9: Hoare triple {47#false} assume 0bv32 == ~cond; {47#false} is VALID [2022-02-20 19:36:57,081 INFO L290 TraceCheckUtils]: 10: Hoare triple {47#false} assume !false; {47#false} is VALID [2022-02-20 19:36:57,082 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 19:36:57,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 19:36:57,082 INFO L144 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-02-20 19:36:57,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850426051] [2022-02-20 19:36:57,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850426051] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:36:57,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:36:57,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 19:36:57,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196928915] [2022-02-20 19:36:57,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:36:57,089 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 19:36:57,090 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:36:57,092 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 19:36:57,126 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 19:36:57,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 19:36:57,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-02-20 19:36:57,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 19:36:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:36:57,152 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 19:37:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:15,235 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-02-20 19:37:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-20 19:37:15,235 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 19:37:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 19:37:15,237 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 19:37:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2022-02-20 19:37:15,244 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 19:37:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2022-02-20 19:37:15,249 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 127 transitions. [2022-02-20 19:37:20,079 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 19:37:20,086 INFO L225 Difference]: With dead ends: 93 [2022-02-20 19:37:20,087 INFO L226 Difference]: Without dead ends: 43 [2022-02-20 19:37:20,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:37:20,093 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 19:37:20,095 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 19:37:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-20 19:37:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-02-20 19:37:20,131 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 19:37:20,132 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 19:37:20,133 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 19:37:20,134 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 19:37:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:20,141 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-20 19:37:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-20 19:37:20,142 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:37:20,142 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:37:20,142 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 19:37:20,143 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 19:37:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 19:37:20,146 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-20 19:37:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-02-20 19:37:20,147 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 19:37:20,147 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 19:37:20,147 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 19:37:20,147 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 19:37:20,148 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 19:37:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-02-20 19:37:20,151 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-02-20 19:37:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 19:37:20,151 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-02-20 19:37:20,151 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 19:37:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-02-20 19:37:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-20 19:37:20,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 19:37:20,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 19:37:20,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-02-20 19:37:20,364 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 19:37:20,365 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 19:37:20,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 19:37:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-02-20 19:37:20,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 19:37:20,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250138348] [2022-02-20 19:37:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 19:37:20,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 19:37:20,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 19:37:20,368 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 19:37:20,368 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 19:37:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:37:20,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-20 19:37:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 19:37:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 19:37:20,585 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 19:37:20,586 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 19:37:20,587 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 19:37:20,587 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 19:37:20,588 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 19:37:20,588 INFO L290 TraceCheckUtils]: 5: Hoare triple {343#false} assume !(0bv32 == gcd_test_~a#1); {343#false} is VALID [2022-02-20 19:37:20,588 INFO L290 TraceCheckUtils]: 6: Hoare triple {343#false} assume !(0bv32 != gcd_test_~b#1); {343#false} is VALID [2022-02-20 19:37:20,588 INFO L290 TraceCheckUtils]: 7: Hoare triple {343#false} gcd_test_#res#1 := gcd_test_~a#1; {343#false} is VALID [2022-02-20 19:37:20,588 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 19:37:20,589 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 19:37:20,589 INFO L290 TraceCheckUtils]: 10: Hoare triple {343#false} ~cond := #in~cond; {343#false} is VALID [2022-02-20 19:37:20,589 INFO L290 TraceCheckUtils]: 11: Hoare triple {343#false} assume 0bv32 == ~cond; {343#false} is VALID [2022-02-20 19:37:20,589 INFO L290 TraceCheckUtils]: 12: Hoare triple {343#false} assume !false; {343#false} is VALID [2022-02-20 19:37:20,589 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 19:37:20,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 19:37:20,589 INFO L144 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-02-20 19:37:20,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250138348] [2022-02-20 19:37:20,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250138348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 19:37:20,590 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 19:37:20,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-20 19:37:20,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234646212] [2022-02-20 19:37:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 19:37:20,591 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 19:37:20,592 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 19:37:20,593 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 19:37:20,620 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 19:37:20,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-20 19:37:20,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-02-20 19:37:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-20 19:37:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-20 19:37:20,622 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)