./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_1_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_1_3.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 44dec35de9ed8408896b6e9513fe1f32435d026e2fe7d21fe3b275ad7f75412d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 07:29:49,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:29:49,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:29:49,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:29:49,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:29:49,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:29:49,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:29:49,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:29:49,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:29:49,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:29:49,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:29:49,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:29:49,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:29:49,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:29:49,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:29:49,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:29:49,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:29:49,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:29:49,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:29:49,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:29:49,983 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:29:49,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:29:49,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:29:49,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:29:49,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:29:49,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:29:49,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:29:49,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:29:49,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:29:49,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:29:49,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:29:49,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:29:49,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:29:49,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:29:49,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:29:49,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:29:49,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:29:49,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:29:49,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:29:49,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:29:49,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:29:49,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:29:49,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 07:29:50,024 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:29:50,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:29:50,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:29:50,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:29:50,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:29:50,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:29:50,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:29:50,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:29:50,026 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:29:50,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:29:50,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:29:50,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 07:29:50,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:29:50,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:29:50,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:29:50,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:29:50,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:29:50,033 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:29:50,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:29:50,033 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:29:50,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:29:50,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:29:50,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:29:50,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:29:50,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:29:50,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:29:50,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:29:50,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:29:50,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 07:29:50,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 07:29:50,035 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:29:50,035 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:29:50,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:29:50,035 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44dec35de9ed8408896b6e9513fe1f32435d026e2fe7d21fe3b275ad7f75412d [2022-07-21 07:29:50,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:29:50,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:29:50,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:29:50,300 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:29:50,301 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:29:50,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_1_3.i [2022-07-21 07:29:50,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bfbb49b8/b0ae5236199a43d6b88e94901d1991b2/FLAG54d2a927c [2022-07-21 07:29:50,658 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:29:50,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_1_3.i [2022-07-21 07:29:50,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bfbb49b8/b0ae5236199a43d6b88e94901d1991b2/FLAG54d2a927c [2022-07-21 07:29:51,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bfbb49b8/b0ae5236199a43d6b88e94901d1991b2 [2022-07-21 07:29:51,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:29:51,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:29:51,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:29:51,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:29:51,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:29:51,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2820fc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51, skipping insertion in model container [2022-07-21 07:29:51,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:29:51,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:29:51,209 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_1_3.i[1224,1237] [2022-07-21 07:29:51,245 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_1_3.i[2806,2819] [2022-07-21 07:29:51,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:29:51,254 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:29:51,271 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_1_3.i[1224,1237] [2022-07-21 07:29:51,297 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_1_3.i[2806,2819] [2022-07-21 07:29:51,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:29:51,311 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:29:51,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51 WrapperNode [2022-07-21 07:29:51,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:29:51,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:29:51,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:29:51,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:29:51,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,350 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 73 [2022-07-21 07:29:51,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:29:51,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:29:51,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:29:51,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:29:51,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:29:51,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:29:51,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:29:51,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:29:51,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (1/1) ... [2022-07-21 07:29:51,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:29:51,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:29:51,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 07:29:51,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 07:29:51,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:29:51,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 07:29:51,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:29:51,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:29:51,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 07:29:51,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 07:29:51,565 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:29:51,566 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:29:51,731 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:29:51,737 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:29:51,738 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 07:29:51,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:29:51 BoogieIcfgContainer [2022-07-21 07:29:51,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:29:51,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:29:51,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:29:51,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:29:51,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:29:51" (1/3) ... [2022-07-21 07:29:51,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b4a17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:29:51, skipping insertion in model container [2022-07-21 07:29:51,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:51" (2/3) ... [2022-07-21 07:29:51,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b4a17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:29:51, skipping insertion in model container [2022-07-21 07:29:51,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:29:51" (3/3) ... [2022-07-21 07:29:51,759 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_1_3.i [2022-07-21 07:29:51,772 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:29:51,772 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:29:51,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:29:51,813 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a4d5450, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1b1848c5 [2022-07-21 07:29:51,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:29:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 07:29:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 07:29:51,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:29:51,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:29:51,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:29:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:29:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1386425161, now seen corresponding path program 1 times [2022-07-21 07:29:51,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:29:51,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210291863] [2022-07-21 07:29:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:29:51,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:29:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:29:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:29:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:29:51,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210291863] [2022-07-21 07:29:51,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210291863] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:29:51,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:29:51,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 07:29:51,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402792965] [2022-07-21 07:29:51,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:29:51,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 07:29:51,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:29:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 07:29:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 07:29:51,943 INFO L87 Difference]: Start difference. First operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:29:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:29:51,955 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-07-21 07:29:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 07:29:51,956 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 07:29:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:29:51,960 INFO L225 Difference]: With dead ends: 57 [2022-07-21 07:29:51,960 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 07:29:51,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 07:29:51,964 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:29:51,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:29:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 07:29:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-21 07:29:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 07:29:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-21 07:29:51,991 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 9 [2022-07-21 07:29:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:29:51,991 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-21 07:29:51,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:29:51,991 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-21 07:29:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 07:29:51,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:29:51,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:29:51,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 07:29:51,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:29:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:29:51,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1329166859, now seen corresponding path program 1 times [2022-07-21 07:29:51,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:29:51,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637790521] [2022-07-21 07:29:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:29:51,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:29:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 07:29:52,006 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 07:29:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 07:29:52,031 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 07:29:52,031 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 07:29:52,033 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-21 07:29:52,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 07:29:52,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 07:29:52,037 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 07:29:52,040 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 07:29:52,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:29:52 BoogieIcfgContainer [2022-07-21 07:29:52,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 07:29:52,060 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 07:29:52,060 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 07:29:52,060 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 07:29:52,061 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:29:51" (3/4) ... [2022-07-21 07:29:52,062 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 07:29:52,063 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 07:29:52,065 INFO L158 Benchmark]: Toolchain (without parser) took 970.88ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.5MB in the beginning and 36.1MB in the end (delta: -8.6MB). Peak memory consumption was 1.5MB. Max. memory is 16.1GB. [2022-07-21 07:29:52,065 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 50.3MB. Free memory was 32.0MB in the beginning and 32.0MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:29:52,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.77ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.4MB in the beginning and 43.2MB in the end (delta: -15.8MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2022-07-21 07:29:52,068 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.94ms. Allocated memory is still 60.8MB. Free memory was 43.2MB in the beginning and 41.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:29:52,069 INFO L158 Benchmark]: Boogie Preprocessor took 30.96ms. Allocated memory is still 60.8MB. Free memory was 41.4MB in the beginning and 40.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 07:29:52,070 INFO L158 Benchmark]: RCFGBuilder took 368.81ms. Allocated memory is still 60.8MB. Free memory was 40.1MB in the beginning and 29.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 07:29:52,070 INFO L158 Benchmark]: TraceAbstraction took 305.79ms. Allocated memory is still 60.8MB. Free memory was 29.0MB in the beginning and 36.7MB in the end (delta: -7.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:29:52,070 INFO L158 Benchmark]: Witness Printer took 2.88ms. Allocated memory is still 60.8MB. Free memory was 36.4MB in the beginning and 36.1MB in the end (delta: 297.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:29:52,075 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 50.3MB. Free memory was 32.0MB in the beginning and 32.0MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 218.77ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.4MB in the beginning and 43.2MB in the end (delta: -15.8MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.94ms. Allocated memory is still 60.8MB. Free memory was 43.2MB in the beginning and 41.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.96ms. Allocated memory is still 60.8MB. Free memory was 41.4MB in the beginning and 40.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 368.81ms. Allocated memory is still 60.8MB. Free memory was 40.1MB in the beginning and 29.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 305.79ms. Allocated memory is still 60.8MB. Free memory was 29.0MB in the beginning and 36.7MB in the end (delta: -7.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.88ms. Allocated memory is still 60.8MB. Free memory was 36.4MB in the beginning and 36.1MB in the end (delta: 297.7kB). There was no memory consumed. 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 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 100. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L100] CALL, EXPR f(IN) [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=49, x=49] [L100] RET, EXPR f(IN) [L100] CALL, EXPR fp(IN) [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=49, x=49] [L100] RET, EXPR fp(IN) [L100] float x = IN - f(IN)/fp(IN); [L108] COND TRUE !(x < 0.1) VAL [IN=49] [L109] reach_error() VAL [IN=49] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 33 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 40 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 40 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-21 07:29:52,136 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 -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_1_3.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 44dec35de9ed8408896b6e9513fe1f32435d026e2fe7d21fe3b275ad7f75412d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 07:29:53,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:29:53,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:29:54,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:29:54,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:29:54,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:29:54,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:29:54,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:29:54,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:29:54,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:29:54,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:29:54,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:29:54,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:29:54,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:29:54,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:29:54,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:29:54,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:29:54,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:29:54,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:29:54,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:29:54,048 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:29:54,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:29:54,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:29:54,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:29:54,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:29:54,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:29:54,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:29:54,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:29:54,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:29:54,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:29:54,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:29:54,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:29:54,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:29:54,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:29:54,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:29:54,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:29:54,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:29:54,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:29:54,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:29:54,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:29:54,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:29:54,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:29:54,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 07:29:54,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:29:54,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:29:54,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:29:54,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:29:54,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:29:54,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:29:54,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:29:54,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:29:54,101 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:29:54,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:29:54,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:29:54,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:29:54,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:29:54,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:29:54,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:29:54,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:29:54,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 07:29:54,103 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 07:29:54,103 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 07:29:54,103 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:29:54,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:29:54,103 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:29:54,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:29:54,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:29:54,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:29:54,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:29:54,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:29:54,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:29:54,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:29:54,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:29:54,105 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 07:29:54,105 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 07:29:54,105 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:29:54,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:29:54,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:29:54,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 07:29:54,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44dec35de9ed8408896b6e9513fe1f32435d026e2fe7d21fe3b275ad7f75412d [2022-07-21 07:29:54,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:29:54,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:29:54,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:29:54,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:29:54,405 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:29:54,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_1_3.i [2022-07-21 07:29:54,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8ffd788/2a92424cd3f344978e270fc40336870c/FLAGb0be21080 [2022-07-21 07:29:54,770 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:29:54,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_1_3.i [2022-07-21 07:29:54,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8ffd788/2a92424cd3f344978e270fc40336870c/FLAGb0be21080 [2022-07-21 07:29:55,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8ffd788/2a92424cd3f344978e270fc40336870c [2022-07-21 07:29:55,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:29:55,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:29:55,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:29:55,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:29:55,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:29:55,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d577c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55, skipping insertion in model container [2022-07-21 07:29:55,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:29:55,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:29:55,334 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_1_3.i[1224,1237] [2022-07-21 07:29:55,402 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_1_3.i[2806,2819] [2022-07-21 07:29:55,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:29:55,417 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:29:55,429 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_1_3.i[1224,1237] [2022-07-21 07:29:55,447 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_1_3.i[2806,2819] [2022-07-21 07:29:55,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:29:55,461 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:29:55,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55 WrapperNode [2022-07-21 07:29:55,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:29:55,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:29:55,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:29:55,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:29:55,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,511 INFO L137 Inliner]: procedures = 28, calls = 16, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 70 [2022-07-21 07:29:55,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:29:55,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:29:55,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:29:55,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:29:55,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:29:55,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:29:55,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:29:55,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:29:55,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (1/1) ... [2022-07-21 07:29:55,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:29:55,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:29:55,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 07:29:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 07:29:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:29:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 07:29:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:29:55,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:29:55,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 07:29:55,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 07:29:55,769 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:29:55,770 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:30:02,473 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:30:02,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:30:02,481 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 07:30:02,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:30:02 BoogieIcfgContainer [2022-07-21 07:30:02,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:30:02,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:30:02,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:30:02,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:30:02,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:29:55" (1/3) ... [2022-07-21 07:30:02,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4828bbb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:30:02, skipping insertion in model container [2022-07-21 07:30:02,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:29:55" (2/3) ... [2022-07-21 07:30:02,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4828bbb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:30:02, skipping insertion in model container [2022-07-21 07:30:02,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:30:02" (3/3) ... [2022-07-21 07:30:02,496 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_1_3.i [2022-07-21 07:30:02,505 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:30:02,506 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:30:02,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:30:02,555 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@232d21a9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6df8cf09 [2022-07-21 07:30:02,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:30:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 07:30:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 07:30:02,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:30:02,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:30:02,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:30:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:30:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1386425161, now seen corresponding path program 1 times [2022-07-21 07:30:02,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 07:30:02,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288097406] [2022-07-21 07:30:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:30:02,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 07:30:02,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 07:30:02,582 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) [2022-07-21 07:30:02,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 07:30:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:30:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 07:30:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:30:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:30:03,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 07:30:03,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 07:30:03,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288097406] [2022-07-21 07:30:03,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288097406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:30:03,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:30:03,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 07:30:03,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946084941] [2022-07-21 07:30:03,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:30:03,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 07:30:03,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 07:30:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 07:30:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 07:30:03,591 INFO L87 Difference]: Start difference. First operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 28 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:30:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:30:03,612 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-07-21 07:30:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 07:30:03,616 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 07:30:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:30:03,621 INFO L225 Difference]: With dead ends: 57 [2022-07-21 07:30:03,622 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 07:30:03,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 07:30:03,627 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:30:03,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:30:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 07:30:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-21 07:30:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 07:30:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-21 07:30:03,659 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 9 [2022-07-21 07:30:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:30:03,660 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-21 07:30:03,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:30:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-21 07:30:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 07:30:03,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:30:03,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:30:03,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 07:30:03,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 07:30:03,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:30:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:30:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1329166859, now seen corresponding path program 1 times [2022-07-21 07:30:03,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 07:30:03,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587508888] [2022-07-21 07:30:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:30:03,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 07:30:03,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 07:30:03,875 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) [2022-07-21 07:30:03,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process