./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_2_6.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_2_6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 07:32:49,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:32:49,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:32:49,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:32:49,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:32:49,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:32:49,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:32:49,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:32:49,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:32:49,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:32:49,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:32:49,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:32:49,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:32:49,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:32:49,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:32:49,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:32:49,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:32:49,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:32:49,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:32:49,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:32:49,963 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:32:49,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:32:49,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:32:49,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:32:49,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:32:49,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:32:49,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:32:49,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:32:49,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:32:49,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:32:49,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:32:49,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:32:49,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:32:49,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:32:49,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:32:49,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:32:49,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:32:49,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:32:49,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:32:49,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:32:49,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:32:49,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:32:49,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 07:32:50,019 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:32:50,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:32:50,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:32:50,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:32:50,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:32:50,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:32:50,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:32:50,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:32:50,022 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:32:50,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:32:50,023 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:32:50,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 07:32:50,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:32:50,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:32:50,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:32:50,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:32:50,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:32:50,024 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:32:50,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:32:50,025 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:32:50,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:32:50,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:32:50,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:32:50,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:32:50,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:32:50,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:32:50,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:32:50,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:32:50,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 07:32:50,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 07:32:50,027 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:32:50,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:32:50,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:32:50,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a [2022-07-21 07:32:50,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:32:50,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:32:50,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:32:50,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:32:50,358 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:32:50,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-07-21 07:32:50,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b201cfe2/25823e9bb68546cc872bd4b363534049/FLAG01a330632 [2022-07-21 07:32:50,811 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:32:50,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-07-21 07:32:50,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b201cfe2/25823e9bb68546cc872bd4b363534049/FLAG01a330632 [2022-07-21 07:32:51,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b201cfe2/25823e9bb68546cc872bd4b363534049 [2022-07-21 07:32:51,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:32:51,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:32:51,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:32:51,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:32:51,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:32:51,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55382ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51, skipping insertion in model container [2022-07-21 07:32:51,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:32:51,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:32:51,390 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_6.i[1224,1237] [2022-07-21 07:32:51,432 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_6.i[2827,2840] [2022-07-21 07:32:51,435 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:32:51,442 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:32:51,467 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_6.i[1224,1237] [2022-07-21 07:32:51,507 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_6.i[2827,2840] [2022-07-21 07:32:51,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:32:51,522 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:32:51,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51 WrapperNode [2022-07-21 07:32:51,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:32:51,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:32:51,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:32:51,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:32:51,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,567 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 72 [2022-07-21 07:32:51,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:32:51,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:32:51,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:32:51,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:32:51,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:32:51,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:32:51,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:32:51,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:32:51,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (1/1) ... [2022-07-21 07:32:51,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:32:51,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:32:51,636 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 07:32:51,651 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 07:32:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:32:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-21 07:32:51,678 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-21 07:32:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-21 07:32:51,678 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-21 07:32:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 07:32:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:32:51,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:32:51,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 07:32:51,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 07:32:51,746 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:32:51,747 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:32:51,947 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:32:51,952 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:32:51,953 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 07:32:51,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:32:51 BoogieIcfgContainer [2022-07-21 07:32:51,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:32:51,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:32:51,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:32:51,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:32:51,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:32:51" (1/3) ... [2022-07-21 07:32:51,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecc03e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:32:51, skipping insertion in model container [2022-07-21 07:32:51,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:51" (2/3) ... [2022-07-21 07:32:51,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecc03e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:32:51, skipping insertion in model container [2022-07-21 07:32:51,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:32:51" (3/3) ... [2022-07-21 07:32:51,961 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_6.i [2022-07-21 07:32:51,972 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:32:51,972 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:32:52,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:32:52,018 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@b02f8de, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@207a29dc [2022-07-21 07:32:52,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:32:52,023 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) [2022-07-21 07:32:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 07:32:52,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:32:52,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:32:52,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:32:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:32:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-07-21 07:32:52,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:32:52,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936597976] [2022-07-21 07:32:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:32:52,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:32:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:32:52,262 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 07:32:52,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:32:52,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936597976] [2022-07-21 07:32:52,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936597976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:32:52,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:32:52,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:32:52,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396118904] [2022-07-21 07:32:52,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:32:52,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:32:52,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:32:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:32:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:32:52,301 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) [2022-07-21 07:32:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:32:52,365 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-07-21 07:32:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:32:52,368 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 [2022-07-21 07:32:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:32:52,377 INFO L225 Difference]: With dead ends: 93 [2022-07-21 07:32:52,377 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 07:32:52,381 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:32:52,384 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:32:52,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:32:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 07:32:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-07-21 07:32:52,425 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) [2022-07-21 07:32:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-21 07:32:52,430 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-07-21 07:32:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:32:52,430 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-21 07:32:52,431 INFO L496 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) [2022-07-21 07:32:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-21 07:32:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 07:32:52,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:32:52,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:32:52,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 07:32:52,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:32:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:32:52,435 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-07-21 07:32:52,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:32:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317854157] [2022-07-21 07:32:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:32:52,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:32:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:32:52,488 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 07:32:52,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:32:52,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317854157] [2022-07-21 07:32:52,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317854157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:32:52,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:32:52,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:32:52,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539740774] [2022-07-21 07:32:52,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:32:52,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:32:52,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:32:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:32:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:32:52,495 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) [2022-07-21 07:32:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:32:52,514 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-07-21 07:32:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:32:52,515 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 [2022-07-21 07:32:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:32:52,525 INFO L225 Difference]: With dead ends: 52 [2022-07-21 07:32:52,526 INFO L226 Difference]: Without dead ends: 38 [2022-07-21 07:32:52,526 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:32:52,527 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:32:52,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:32:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-21 07:32:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-21 07:32:52,534 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) [2022-07-21 07:32:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-07-21 07:32:52,535 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-07-21 07:32:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:32:52,535 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-07-21 07:32:52,536 INFO L496 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) [2022-07-21 07:32:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-07-21 07:32:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 07:32:52,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:32:52,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:32:52,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 07:32:52,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:32:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:32:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-07-21 07:32:52,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:32:52,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854855236] [2022-07-21 07:32:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:32:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:32:52,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:32:52,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877152890] [2022-07-21 07:32:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:32:52,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:32:52,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:32:52,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 07:32:52,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 07:32:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:32:52,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 07:32:52,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:32:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:32:52,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:32:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:32:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:32:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854855236] [2022-07-21 07:32:52,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 07:32:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877152890] [2022-07-21 07:32:52,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877152890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:32:52,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:32:52,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-21 07:32:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959277000] [2022-07-21 07:32:52,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:32:52,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:32:52,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:32:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:32:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:32:52,757 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) [2022-07-21 07:32:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:32:52,797 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-07-21 07:32:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 07:32:52,797 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 [2022-07-21 07:32:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:32:52,798 INFO L225 Difference]: With dead ends: 55 [2022-07-21 07:32:52,798 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 07:32:52,799 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:32:52,800 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:32:52,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:32:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 07:32:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-21 07:32:52,806 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) [2022-07-21 07:32:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-21 07:32:52,808 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2022-07-21 07:32:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:32:52,809 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-21 07:32:52,809 INFO L496 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) [2022-07-21 07:32:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-21 07:32:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 07:32:52,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:32:52,811 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:32:52,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 07:32:53,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:32:53,027 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:32:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:32:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1992731711, now seen corresponding path program 1 times [2022-07-21 07:32:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:32:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981042699] [2022-07-21 07:32:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:32:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:32:53,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:32:53,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907665927] [2022-07-21 07:32:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:32:53,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:32:53,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:32:53,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 07:32:53,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 07:32:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:32:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 07:32:53,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:32:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:32:53,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:32:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:32:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:32:53,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981042699] [2022-07-21 07:32:53,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 07:32:53,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907665927] [2022-07-21 07:32:53,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907665927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:32:53,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:32:53,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 07:32:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190959051] [2022-07-21 07:32:53,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:32:53,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 07:32:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:32:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 07:32:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-21 07:32:53,340 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) [2022-07-21 07:32:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:32:53,429 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-21 07:32:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 07:32:53,430 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 [2022-07-21 07:32:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:32:53,431 INFO L225 Difference]: With dead ends: 57 [2022-07-21 07:32:53,431 INFO L226 Difference]: Without dead ends: 44 [2022-07-21 07:32:53,431 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:32:53,432 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 07:32:53,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 198 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 07:32:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-21 07:32:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-21 07:32:53,441 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) [2022-07-21 07:32:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-07-21 07:32:53,443 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2022-07-21 07:32:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:32:53,444 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-07-21 07:32:53,444 INFO L496 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) [2022-07-21 07:32:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-07-21 07:32:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 07:32:53,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:32:53,445 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:32:53,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 07:32:53,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 07:32:53,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:32:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:32:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2022-07-21 07:32:53,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:32:53,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261552719] [2022-07-21 07:32:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:32:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:32:53,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 07:32:53,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687306482] [2022-07-21 07:32:53,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 07:32:53,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:32:53,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:32:53,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 07:32:53,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 07:32:53,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 07:32:53,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 07:32:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 07:32:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:32:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:32:53,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:32:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:32:53,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 07:32:53,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261552719] [2022-07-21 07:32:53,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 07:32:53,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687306482] [2022-07-21 07:32:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687306482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:32:53,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:32:53,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-21 07:32:53,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458837394] [2022-07-21 07:32:53,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:32:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 07:32:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 07:32:53,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 07:32:53,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-21 07:32:53,912 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) [2022-07-21 07:32:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:32:54,009 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2022-07-21 07:32:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 07:32:54,010 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 [2022-07-21 07:32:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:32:54,011 INFO L225 Difference]: With dead ends: 65 [2022-07-21 07:32:54,011 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 07:32:54,012 INFO L412 NwaCegarLoop]: 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 [2022-07-21 07:32:54,012 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 07:32:54,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 07:32:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 07:32:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-21 07:32:54,019 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) [2022-07-21 07:32:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-07-21 07:32:54,020 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 21 [2022-07-21 07:32:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:32:54,020 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-07-21 07:32:54,020 INFO L496 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) [2022-07-21 07:32:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-07-21 07:32:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 07:32:54,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:32:54,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:32:54,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 07:32:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 07:32:54,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:32:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:32:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-07-21 07:32:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 07:32:54,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840564302] [2022-07-21 07:32:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:32:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 07:32:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 07:32:54,251 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 07:32:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 07:32:54,272 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 07:32:54,272 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 07:32:54,273 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-21 07:32:54,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 07:32:54,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 07:32:54,277 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-07-21 07:32:54,280 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 07:32:54,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:32:54 BoogieIcfgContainer [2022-07-21 07:32:54,298 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 07:32:54,299 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 07:32:54,299 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 07:32:54,299 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 07:32:54,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:32:51" (3/4) ... [2022-07-21 07:32:54,301 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 07:32:54,301 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 07:32:54,302 INFO L158 Benchmark]: Toolchain (without parser) took 3100.54ms. Allocated memory was 69.2MB in the beginning and 86.0MB in the end (delta: 16.8MB). Free memory was 49.3MB in the beginning and 56.0MB in the end (delta: -6.7MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2022-07-21 07:32:54,302 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 69.2MB. Free memory was 49.8MB in the beginning and 49.8MB in the end (delta: 31.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:32:54,302 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.89ms. Allocated memory is still 69.2MB. Free memory was 49.1MB in the beginning and 51.0MB in the end (delta: -1.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 07:32:54,302 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.04ms. Allocated memory is still 69.2MB. Free memory was 50.8MB in the beginning and 49.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:32:54,303 INFO L158 Benchmark]: Boogie Preprocessor took 38.26ms. Allocated memory is still 69.2MB. Free memory was 49.2MB in the beginning and 48.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 07:32:54,303 INFO L158 Benchmark]: RCFGBuilder took 347.05ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 37.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 07:32:54,303 INFO L158 Benchmark]: TraceAbstraction took 2342.41ms. Allocated memory was 69.2MB in the beginning and 86.0MB in the end (delta: 16.8MB). Free memory was 36.7MB in the beginning and 56.0MB in the end (delta: -19.3MB). Peak memory consumption was 464.5kB. Max. memory is 16.1GB. [2022-07-21 07:32:54,304 INFO L158 Benchmark]: Witness Printer took 2.74ms. Allocated memory is still 86.0MB. Free memory is still 56.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:32:54,305 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 69.2MB. Free memory was 49.8MB in the beginning and 49.8MB in the end (delta: 31.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.89ms. Allocated memory is still 69.2MB. Free memory was 49.1MB in the beginning and 51.0MB in the end (delta: -1.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.04ms. Allocated memory is still 69.2MB. Free memory was 50.8MB in the beginning and 49.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.26ms. Allocated memory is still 69.2MB. Free memory was 49.2MB in the beginning and 48.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 347.05ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 37.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2342.41ms. Allocated memory was 69.2MB in the beginning and 86.0MB in the end (delta: 16.8MB). Free memory was 36.7MB in the beginning and 56.0MB in the end (delta: -19.3MB). Peak memory consumption was 464.5kB. Max. memory is 16.1GB. * Witness Printer took 2.74ms. Allocated memory is still 86.0MB. Free memory is still 56.0MB. 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 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=53] [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)=53, x=53] [L100] RET, EXPR f(IN) VAL [f(IN)=50, IN=53] [L100] CALL, EXPR fp(IN) VAL [\old(x)=53] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=53, x=53] [L100] RET, EXPR fp(IN) VAL [f(IN)=50, fp(IN)=49, IN=53] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=51] [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)=51, x=51] [L102] RET, EXPR f(x) VAL [f(x)=54, IN=53, x=51] [L102] CALL, EXPR fp(x) VAL [\old(x)=51] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR fp(x) VAL [f(x)=54, fp(x)=52, IN=53, x=51] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=53] [L109] reach_error() VAL [IN=53] - 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 4 procedures, 43 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33 mSDsluCounter, 754 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 560 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 155 IncrementalHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 194 mSDtfsCounter, 155 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 435 SizeOfPredicates, 17 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 12/52 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 07:32:54,337 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_2_6.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 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 07:32:56,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 07:32:56,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 07:32:56,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 07:32:56,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 07:32:56,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 07:32:56,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 07:32:56,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 07:32:56,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 07:32:56,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 07:32:56,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 07:32:56,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 07:32:56,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 07:32:56,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 07:32:56,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 07:32:56,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 07:32:56,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 07:32:56,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 07:32:56,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 07:32:56,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 07:32:56,167 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 07:32:56,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 07:32:56,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 07:32:56,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 07:32:56,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 07:32:56,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 07:32:56,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 07:32:56,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 07:32:56,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 07:32:56,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 07:32:56,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 07:32:56,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 07:32:56,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 07:32:56,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 07:32:56,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 07:32:56,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 07:32:56,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 07:32:56,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 07:32:56,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 07:32:56,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 07:32:56,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 07:32:56,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 07:32:56,195 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 07:32:56,222 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 07:32:56,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 07:32:56,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 07:32:56,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 07:32:56,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 07:32:56,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 07:32:56,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 07:32:56,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 07:32:56,224 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 07:32:56,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 07:32:56,225 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 07:32:56,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 07:32:56,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 07:32:56,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 07:32:56,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 07:32:56,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 07:32:56,236 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 07:32:56,236 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 07:32:56,236 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 07:32:56,236 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 07:32:56,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 07:32:56,237 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 07:32:56,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 07:32:56,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 07:32:56,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 07:32:56,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 07:32:56,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:32:56,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 07:32:56,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 07:32:56,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 07:32:56,239 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 07:32:56,239 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 07:32:56,239 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 07:32:56,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 07:32:56,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 07:32:56,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 07:32:56,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a [2022-07-21 07:32:56,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 07:32:56,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 07:32:56,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 07:32:56,582 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 07:32:56,583 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 07:32:56,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-07-21 07:32:56,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5394b5f5/7ad6de509d3249d9ba895a446c3a80d3/FLAG2138ca59a [2022-07-21 07:32:57,070 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 07:32:57,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-07-21 07:32:57,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5394b5f5/7ad6de509d3249d9ba895a446c3a80d3/FLAG2138ca59a [2022-07-21 07:32:57,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5394b5f5/7ad6de509d3249d9ba895a446c3a80d3 [2022-07-21 07:32:57,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 07:32:57,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 07:32:57,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 07:32:57,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 07:32:57,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 07:32:57,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504b67c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57, skipping insertion in model container [2022-07-21 07:32:57,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 07:32:57,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 07:32:57,663 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_6.i[1224,1237] [2022-07-21 07:32:57,703 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_6.i[2827,2840] [2022-07-21 07:32:57,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:32:57,753 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 07:32:57,778 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_6.i[1224,1237] [2022-07-21 07:32:57,795 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_6.i[2827,2840] [2022-07-21 07:32:57,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 07:32:57,812 INFO L208 MainTranslator]: Completed translation [2022-07-21 07:32:57,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57 WrapperNode [2022-07-21 07:32:57,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 07:32:57,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 07:32:57,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 07:32:57,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 07:32:57,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,865 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2022-07-21 07:32:57,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 07:32:57,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 07:32:57,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 07:32:57,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 07:32:57,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 07:32:57,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 07:32:57,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 07:32:57,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 07:32:57,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (1/1) ... [2022-07-21 07:32:57,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 07:32:57,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 07:32:57,944 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 07:32:57,964 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 07:32:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 07:32:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 07:32:57,994 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-21 07:32:57,994 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-21 07:32:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-21 07:32:57,995 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-21 07:32:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 07:32:57,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 07:32:57,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 07:32:57,996 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 07:32:58,066 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 07:32:58,067 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 07:33:06,965 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 07:33:06,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 07:33:06,970 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 07:33:06,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:33:06 BoogieIcfgContainer [2022-07-21 07:33:06,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 07:33:06,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 07:33:06,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 07:33:06,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 07:33:06,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:32:57" (1/3) ... [2022-07-21 07:33:06,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4114af91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:33:06, skipping insertion in model container [2022-07-21 07:33:06,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:32:57" (2/3) ... [2022-07-21 07:33:06,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4114af91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:33:06, skipping insertion in model container [2022-07-21 07:33:06,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:33:06" (3/3) ... [2022-07-21 07:33:06,988 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_6.i [2022-07-21 07:33:06,999 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 07:33:06,999 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 07:33:07,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 07:33:07,057 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@bc4a82b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11321f3e [2022-07-21 07:33:07,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 07:33:07,062 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) [2022-07-21 07:33:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 07:33:07,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:33:07,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:33:07,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:33:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:33:07,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-07-21 07:33:07,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 07:33:07,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936064081] [2022-07-21 07:33:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:33:07,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 07:33:07,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 07:33:07,087 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 07:33:07,089 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 07:33:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:33:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 07:33:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:33:07,260 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 07:33:07,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 07:33:07,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 07:33:07,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936064081] [2022-07-21 07:33:07,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936064081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:33:07,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:33:07,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:33:07,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635483604] [2022-07-21 07:33:07,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:33:07,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:33:07,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 07:33:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:33:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:33:07,291 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) [2022-07-21 07:33:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:33:07,393 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-07-21 07:33:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:33:07,395 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 [2022-07-21 07:33:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:33:07,401 INFO L225 Difference]: With dead ends: 93 [2022-07-21 07:33:07,401 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 07:33:07,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:33:07,407 INFO L413 NwaCegarLoop]: 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 [2022-07-21 07:33:07,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 07:33:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 07:33:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-07-21 07:33:07,444 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) [2022-07-21 07:33:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-21 07:33:07,446 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-07-21 07:33:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:33:07,447 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-21 07:33:07,447 INFO L496 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) [2022-07-21 07:33:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-21 07:33:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 07:33:07,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:33:07,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:33:07,458 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 07:33:07,649 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 07:33:07,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:33:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:33:07,650 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-07-21 07:33:07,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 07:33:07,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152744632] [2022-07-21 07:33:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:33:07,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 07:33:07,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 07:33:07,653 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 07:33:07,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 07:33:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:33:07,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 07:33:07,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:33:07,788 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 07:33:07,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 07:33:07,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 07:33:07,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152744632] [2022-07-21 07:33:07,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152744632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:33:07,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:33:07,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:33:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341341173] [2022-07-21 07:33:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:33:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:33:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 07:33:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:33:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:33:07,792 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) [2022-07-21 07:33:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:33:07,875 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-07-21 07:33:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:33:07,877 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 [2022-07-21 07:33:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:33:07,878 INFO L225 Difference]: With dead ends: 52 [2022-07-21 07:33:07,878 INFO L226 Difference]: Without dead ends: 38 [2022-07-21 07:33:07,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:33:07,880 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 07:33:07,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 07:33:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-21 07:33:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-21 07:33:07,886 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) [2022-07-21 07:33:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-07-21 07:33:07,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-07-21 07:33:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:33:07,887 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-07-21 07:33:07,887 INFO L496 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) [2022-07-21 07:33:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-07-21 07:33:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 07:33:07,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:33:07,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:33:07,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 07:33:08,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 07:33:08,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:33:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:33:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-07-21 07:33:08,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 07:33:08,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499953195] [2022-07-21 07:33:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:33:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 07:33:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 07:33:08,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 07:33:08,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 07:33:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:33:08,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 07:33:08,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:33:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:33:08,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 07:33:08,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 07:33:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499953195] [2022-07-21 07:33:08,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499953195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 07:33:08,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 07:33:08,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 07:33:08,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714073426] [2022-07-21 07:33:08,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 07:33:08,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 07:33:08,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 07:33:08,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 07:33:08,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:33:08,404 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-21 07:33:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:33:08,497 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-21 07:33:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 07:33:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 [2022-07-21 07:33:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:33:08,499 INFO L225 Difference]: With dead ends: 53 [2022-07-21 07:33:08,499 INFO L226 Difference]: Without dead ends: 40 [2022-07-21 07:33:08,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 07:33:08,500 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 07:33:08,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 07:33:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-21 07:33:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-21 07:33:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 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) [2022-07-21 07:33:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-07-21 07:33:08,506 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2022-07-21 07:33:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:33:08,507 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-07-21 07:33:08,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-21 07:33:08,507 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-07-21 07:33:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 07:33:08,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:33:08,511 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:33:08,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 07:33:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 07:33:08,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:33:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:33:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2022-07-21 07:33:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 07:33:08,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383810104] [2022-07-21 07:33:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:33:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 07:33:08,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 07:33:08,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 07:33:08,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 07:33:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 07:33:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 07:33:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:33:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:33:09,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:33:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 07:33:09,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 07:33:09,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383810104] [2022-07-21 07:33:09,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383810104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:33:09,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:33:09,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-21 07:33:09,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487362293] [2022-07-21 07:33:09,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:33:09,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 07:33:09,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 07:33:09,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 07:33:09,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:33:09,452 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-07-21 07:33:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:33:09,689 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2022-07-21 07:33:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 07:33:09,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 17 [2022-07-21 07:33:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:33:09,696 INFO L225 Difference]: With dead ends: 57 [2022-07-21 07:33:09,697 INFO L226 Difference]: Without dead ends: 44 [2022-07-21 07:33:09,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 07:33:09,698 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 07:33:09,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 07:33:09,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-21 07:33:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-21 07:33:09,706 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) [2022-07-21 07:33:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-07-21 07:33:09,709 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 17 [2022-07-21 07:33:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:33:09,709 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-07-21 07:33:09,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-07-21 07:33:09,710 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-07-21 07:33:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 07:33:09,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:33:09,711 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:33:09,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 07:33:09,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 07:33:09,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:33:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:33:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash -626365316, now seen corresponding path program 2 times [2022-07-21 07:33:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 07:33:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537042297] [2022-07-21 07:33:09,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 07:33:09,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 07:33:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 07:33:09,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 07:33:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 07:33:10,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 07:33:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 07:33:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 07:33:10,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 07:33:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 07:33:11,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 07:33:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 07:33:18,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 07:33:18,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537042297] [2022-07-21 07:33:18,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537042297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 07:33:18,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 07:33:18,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-21 07:33:18,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023852502] [2022-07-21 07:33:18,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 07:33:18,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 07:33:18,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 07:33:18,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 07:33:18,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-21 07:33:18,320 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:33:35,363 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 07:33:50,506 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 07:34:06,605 WARN L233 SmtUtils]: Spent 10.38s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 07:34:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 07:34:10,870 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2022-07-21 07:34:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 07:34:10,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-21 07:34:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 07:34:10,904 INFO L225 Difference]: With dead ends: 68 [2022-07-21 07:34:10,904 INFO L226 Difference]: Without dead ends: 65 [2022-07-21 07:34:10,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-07-21 07:34:10,906 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-21 07:34:10,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 345 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-07-21 07:34:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-21 07:34:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-07-21 07:34:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 07:34:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-21 07:34:10,915 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 21 [2022-07-21 07:34:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 07:34:10,915 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-21 07:34:10,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 07:34:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-21 07:34:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 07:34:10,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 07:34:10,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 07:34:10,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 07:34:11,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 07:34:11,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 07:34:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 07:34:11,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-07-21 07:34:11,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 07:34:11,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25033410] [2022-07-21 07:34:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 07:34:11,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 07:34:11,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 07:34:11,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 07:34:11,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 07:34:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 07:34:23,948 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 07:36:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 07:36:44,082 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-21 07:36:44,082 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 07:36:44,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-21 07:36:44,084 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 07:36:44,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 07:36:44,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 07:36:44,288 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-07-21 07:36:44,291 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 07:36:44,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:36:44 BoogieIcfgContainer [2022-07-21 07:36:44,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 07:36:44,314 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 07:36:44,314 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 07:36:44,315 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 07:36:44,315 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:33:06" (3/4) ... [2022-07-21 07:36:44,316 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 07:36:44,350 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 07:36:44,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 07:36:44,351 INFO L158 Benchmark]: Toolchain (without parser) took 226883.70ms. Allocated memory was 50.3MB in the beginning and 65.0MB in the end (delta: 14.7MB). Free memory was 27.5MB in the beginning and 31.7MB in the end (delta: -4.2MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. [2022-07-21 07:36:44,352 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 50.3MB. Free memory was 32.2MB in the beginning and 32.1MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:36:44,352 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.76ms. Allocated memory was 50.3MB in the beginning and 65.0MB in the end (delta: 14.7MB). Free memory was 27.3MB in the beginning and 46.9MB in the end (delta: -19.7MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-21 07:36:44,352 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.23ms. Allocated memory is still 65.0MB. Free memory was 46.9MB in the beginning and 45.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 07:36:44,353 INFO L158 Benchmark]: Boogie Preprocessor took 47.41ms. Allocated memory is still 65.0MB. Free memory was 45.1MB in the beginning and 43.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 07:36:44,353 INFO L158 Benchmark]: RCFGBuilder took 9056.84ms. Allocated memory is still 65.0MB. Free memory was 43.6MB in the beginning and 32.7MB in the end (delta: 10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 07:36:44,353 INFO L158 Benchmark]: TraceAbstraction took 217330.96ms. Allocated memory is still 65.0MB. Free memory was 46.8MB in the beginning and 33.8MB in the end (delta: 13.0MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2022-07-21 07:36:44,354 INFO L158 Benchmark]: Witness Printer took 36.45ms. Allocated memory is still 65.0MB. Free memory was 33.8MB in the beginning and 31.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 07:36:44,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 50.3MB. Free memory was 32.2MB in the beginning and 32.1MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.76ms. Allocated memory was 50.3MB in the beginning and 65.0MB in the end (delta: 14.7MB). Free memory was 27.3MB in the beginning and 46.9MB in the end (delta: -19.7MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.23ms. Allocated memory is still 65.0MB. Free memory was 46.9MB in the beginning and 45.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.41ms. Allocated memory is still 65.0MB. Free memory was 45.1MB in the beginning and 43.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 9056.84ms. Allocated memory is still 65.0MB. Free memory was 43.6MB in the beginning and 32.7MB in the end (delta: 10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 217330.96ms. Allocated memory is still 65.0MB. Free memory was 46.8MB in the beginning and 33.8MB in the end (delta: 13.0MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. * Witness Printer took 36.45ms. Allocated memory is still 65.0MB. Free memory was 33.8MB in the beginning and 31.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - CounterExampleResult [Line: 109]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=1.1658613681793213] [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)=1.1658613681793213, \result=0.9202789664268494, x=1.1658613681793213] [L100] RET, EXPR f(IN) VAL [f(IN)=0.9202789664268494, IN=1.1658613681793213] [L100] CALL, EXPR fp(IN) VAL [\old(x)=1.1658613681793213] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=1.1658613681793213, \result=0.4008511006832123, x=1.1658613681793213] [L100] RET, EXPR fp(IN) VAL [f(IN)=0.9202789664268494, fp(IN)=0.4008511006832123, IN=1.1658613681793213] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=-1.1299512386322021] [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)=-1.1299512386322021, \result=-0.9053165316581726, x=-1.1299512386322021] [L102] RET, EXPR f(x) VAL [f(x)=-0.9053165316581726, IN=1.1658613681793213, x=-1.1299512386322021] [L102] CALL, EXPR fp(x) VAL [\old(x)=-1.1299512386322021] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=-1.1299512386322021, \result=0.43242064118385315, x=-1.1299512386322021] [L102] RET, EXPR fp(x) VAL [f(x)=-0.9053165316581726, fp(x)=0.43242064118385315, IN=1.1658613681793213, x=-1.1299512386322021] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=1.1658613681793213, x=0.9636502265930176] [L109] reach_error() VAL [IN=1.1658613681793213, x=0.9636502265930176] - 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 4 procedures, 43 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 217.3s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 53.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 56 SdHoareTripleChecker+Valid, 8.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 53 mSDsluCounter, 707 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 514 mSDsCounter, 44 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 293 IncrementalHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 44 mSolverCounterUnsat, 193 mSDtfsCounter, 293 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 51.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=5, InterpolantAutomatonStates: 31, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 13.0s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 493 SizeOfPredicates, 21 NumberOfNonLiveVariables, 198 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 7/41 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 proved your program to be incorrect! [2022-07-21 07:36:44,522 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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE