./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0 --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 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:36:28,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:36:28,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:36:28,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:36:28,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:36:28,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:36:28,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:36:28,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:36:28,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:36:28,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:36:28,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:36:28,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:36:28,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:36:28,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:36:28,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:36:28,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:36:28,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:36:28,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:36:28,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:36:28,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:36:28,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:36:28,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:36:28,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:36:28,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:36:28,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:36:28,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:36:28,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:36:28,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:36:28,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:36:28,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:36:28,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:36:28,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:36:28,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:36:28,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:36:28,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:36:28,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:36:28,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:36:28,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:36:28,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:36:28,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:36:28,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:36:28,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:36:28,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:36:28,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:36:28,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:36:28,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:36:28,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:36:28,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:36:28,982 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:36:28,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:36:28,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:36:28,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:36:28,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:36:28,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:36:28,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:36:28,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:36:28,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:36:28,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:36:28,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:36:28,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:36:28,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:36:28,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:36:28,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:36:28,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:36:28,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:36:28,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:36:28,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:36:28,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:36:28,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:36:28,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:36:28,987 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:36:28,987 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:36:28,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:36:28,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:36:28,988 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2021-11-22 15:36:29,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:36:29,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:36:29,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:36:29,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:36:29,285 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:36:29,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2021-11-22 15:36:29,361 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data/4cca2bb7d/16c5652eee234cc4a1fd6a9276a2d1eb/FLAGaa27d65ee [2021-11-22 15:36:29,860 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:36:29,860 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2021-11-22 15:36:29,868 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data/4cca2bb7d/16c5652eee234cc4a1fd6a9276a2d1eb/FLAGaa27d65ee [2021-11-22 15:36:30,223 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data/4cca2bb7d/16c5652eee234cc4a1fd6a9276a2d1eb [2021-11-22 15:36:30,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:36:30,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:36:30,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:36:30,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:36:30,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:36:30,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d0c9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30, skipping insertion in model container [2021-11-22 15:36:30,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:36:30,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:36:30,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2021-11-22 15:36:30,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2021-11-22 15:36:30,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:36:30,518 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:36:30,532 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2021-11-22 15:36:30,545 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2021-11-22 15:36:30,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:36:30,561 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:36:30,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30 WrapperNode [2021-11-22 15:36:30,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:36:30,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:36:30,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:36:30,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:36:30,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,607 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 89 [2021-11-22 15:36:30,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:36:30,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:36:30,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:36:30,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:36:30,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:36:30,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:36:30,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:36:30,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:36:30,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (1/1) ... [2021-11-22 15:36:30,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:36:30,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:30,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:36:30,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:36:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:36:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:36:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:36:30,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:36:30,825 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:36:30,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:36:31,021 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:36:31,028 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:36:31,029 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:36:31,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:36:31 BoogieIcfgContainer [2021-11-22 15:36:31,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:36:31,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:36:31,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:36:31,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:36:31,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:36:30" (1/3) ... [2021-11-22 15:36:31,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a69856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:36:31, skipping insertion in model container [2021-11-22 15:36:31,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:30" (2/3) ... [2021-11-22 15:36:31,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a69856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:36:31, skipping insertion in model container [2021-11-22 15:36:31,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:36:31" (3/3) ... [2021-11-22 15:36:31,040 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_6.i [2021-11-22 15:36:31,045 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:36:31,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:36:31,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:36:31,141 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:36:31,141 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:36:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:36:31,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:31,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:31,167 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1947301547, now seen corresponding path program 1 times [2021-11-22 15:36:31,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:31,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308101444] [2021-11-22 15:36:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:31,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:31,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:31,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308101444] [2021-11-22 15:36:31,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308101444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:31,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:31,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:36:31,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722245537] [2021-11-22 15:36:31,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:31,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:36:31,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:31,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:36:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:36:31,508 INFO L87 Difference]: Start difference. First operand has 29 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:31,606 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-11-22 15:36:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:36:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 15:36:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:31,621 INFO L225 Difference]: With dead ends: 74 [2021-11-22 15:36:31,621 INFO L226 Difference]: Without dead ends: 28 [2021-11-22 15:36:31,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:36:31,630 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:31,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 89 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-22 15:36:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-11-22 15:36:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-22 15:36:31,670 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2021-11-22 15:36:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:31,671 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-22 15:36:31,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-22 15:36:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:36:31,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:31,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:31,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:36:31,673 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1538319123, now seen corresponding path program 1 times [2021-11-22 15:36:31,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:31,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072132229] [2021-11-22 15:36:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:31,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:31,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:36:31,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072132229] [2021-11-22 15:36:31,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072132229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:31,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:31,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:36:31,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531986809] [2021-11-22 15:36:31,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:31,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:36:31,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:36:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:36:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:36:31,792 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:31,882 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-22 15:36:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:36:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 15:36:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:31,884 INFO L225 Difference]: With dead ends: 28 [2021-11-22 15:36:31,884 INFO L226 Difference]: Without dead ends: 22 [2021-11-22 15:36:31,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:36:31,887 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:31,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 80 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:36:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-22 15:36:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-22 15:36:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-22 15:36:31,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2021-11-22 15:36:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:31,894 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-22 15:36:31,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-22 15:36:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:36:31,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:31,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:31,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:36:31,896 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -19206151, now seen corresponding path program 1 times [2021-11-22 15:36:31,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:36:31,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958364820] [2021-11-22 15:36:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:31,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:36:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 15:36:31,915 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 15:36:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 15:36:31,951 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 15:36:31,951 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 15:36:31,952 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-22 15:36:31,955 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-22 15:36:31,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:36:31,962 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-22 15:36:31,966 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 15:36:31,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 03:36:31 BoogieIcfgContainer [2021-11-22 15:36:31,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 15:36:31,995 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 15:36:31,995 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 15:36:31,995 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 15:36:31,996 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:36:31" (3/4) ... [2021-11-22 15:36:31,999 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-22 15:36:31,999 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 15:36:32,000 INFO L158 Benchmark]: Toolchain (without parser) took 1772.97ms. Allocated memory was 96.5MB in the beginning and 138.4MB in the end (delta: 41.9MB). Free memory was 56.4MB in the beginning and 107.5MB in the end (delta: -51.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:36:32,001 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 72.4MB in the beginning and 72.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:36:32,002 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.63ms. Allocated memory is still 96.5MB. Free memory was 56.2MB in the beginning and 70.7MB in the end (delta: -14.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-22 15:36:32,003 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.72ms. Allocated memory is still 96.5MB. Free memory was 70.3MB in the beginning and 68.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 15:36:32,004 INFO L158 Benchmark]: Boogie Preprocessor took 28.43ms. Allocated memory is still 96.5MB. Free memory was 68.6MB in the beginning and 67.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 15:36:32,004 INFO L158 Benchmark]: RCFGBuilder took 393.81ms. Allocated memory is still 96.5MB. Free memory was 67.3MB in the beginning and 56.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 15:36:32,005 INFO L158 Benchmark]: TraceAbstraction took 960.27ms. Allocated memory was 96.5MB in the beginning and 138.4MB in the end (delta: 41.9MB). Free memory was 56.1MB in the beginning and 107.5MB in the end (delta: -51.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:36:32,005 INFO L158 Benchmark]: Witness Printer took 5.02ms. Allocated memory is still 138.4MB. Free memory is still 107.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:36:32,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 72.4MB in the beginning and 72.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 332.63ms. Allocated memory is still 96.5MB. Free memory was 56.2MB in the beginning and 70.7MB in the end (delta: -14.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.72ms. Allocated memory is still 96.5MB. Free memory was 70.3MB in the beginning and 68.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.43ms. Allocated memory is still 96.5MB. Free memory was 68.6MB in the beginning and 67.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 393.81ms. Allocated memory is still 96.5MB. Free memory was 67.3MB in the beginning and 56.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 960.27ms. Allocated memory was 96.5MB in the beginning and 138.4MB in the end (delta: 41.9MB). Free memory was 56.1MB in the beginning and 107.5MB in the end (delta: -51.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.02ms. Allocated memory is still 138.4MB. Free memory is still 107.5MB. 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: 102]: 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 91, overapproximation of someBinaryDOUBLEComparisonOperation at line 101, overapproximation of someBinaryArithmeticFLOAToperation at line 95. Possible FailurePath: [L108] COND FALSE !(__VERIFIER_nondet_int()) [L111] CALL main2() [L90] float IN = __VERIFIER_nondet_float(); [L91] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L75] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L91] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L93] CALL, EXPR f(IN) [L80] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=49, x=49] [L93] RET, EXPR f(IN) [L93] CALL, EXPR fp(IN) [L85] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=49, x=49] [L93] RET, EXPR fp(IN) [L93] float x = IN - f(IN)/fp(IN); [L95] CALL, EXPR f(x) [L80] 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] [L95] RET, EXPR f(x) [L95] CALL, EXPR fp(x) [L85] 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] [L95] RET, EXPR fp(x) [L95] x = x - f(x)/fp(x) [L101] COND TRUE !(x < 0.1) VAL [IN=49] [L102] reach_error() VAL [IN=49] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 169 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 115 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45 IncrementalHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 54 mSDtfsCounter, 45 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 10, 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, 2 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 57 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-22 15:36:32,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/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=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0 --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 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:36:34,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:36:34,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:36:34,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:36:34,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:36:34,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:36:34,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:36:34,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:36:34,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:36:34,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:36:34,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:36:34,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:36:34,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:36:34,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:36:34,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:36:34,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:36:34,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:36:34,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:36:34,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:36:34,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:36:34,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:36:34,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:36:34,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:36:34,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:36:34,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:36:34,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:36:34,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:36:34,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:36:34,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:36:34,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:36:34,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:36:34,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:36:34,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:36:34,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:36:34,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:36:34,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:36:34,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:36:34,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:36:34,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:36:34,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:36:34,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:36:34,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-22 15:36:34,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:36:34,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:36:34,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:36:34,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:36:34,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:36:34,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:36:34,831 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:36:34,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:36:34,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:36:34,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:36:34,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:36:34,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:36:34,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:36:34,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:36:34,837 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 15:36:34,838 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 15:36:34,838 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 15:36:34,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:36:34,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:36:34,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:36:34,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:36:34,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:36:34,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:36:34,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:36:34,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:36:34,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:36:34,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:36:34,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:36:34,843 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 15:36:34,843 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 15:36:34,844 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:36:34,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:36:34,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:36:34,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:36:34,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 15:36:34,845 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2021-11-22 15:36:35,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:36:35,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:36:35,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:36:35,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:36:35,289 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:36:35,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2021-11-22 15:36:35,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data/30182eb1f/669261da5c42443ebb374be60ea18820/FLAGb23f4cdd2 [2021-11-22 15:36:36,009 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:36:36,009 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2021-11-22 15:36:36,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data/30182eb1f/669261da5c42443ebb374be60ea18820/FLAGb23f4cdd2 [2021-11-22 15:36:36,364 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/data/30182eb1f/669261da5c42443ebb374be60ea18820 [2021-11-22 15:36:36,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:36:36,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:36:36,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:36:36,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:36:36,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:36:36,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581b1423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36, skipping insertion in model container [2021-11-22 15:36:36,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:36:36,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:36:36,601 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2021-11-22 15:36:36,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2021-11-22 15:36:36,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:36:36,680 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:36:36,716 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2021-11-22 15:36:36,765 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2021-11-22 15:36:36,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:36:36,784 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:36:36,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36 WrapperNode [2021-11-22 15:36:36,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:36:36,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:36:36,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:36:36,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:36:36,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,833 INFO L137 Inliner]: procedures = 28, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 84 [2021-11-22 15:36:36,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:36:36,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:36:36,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:36:36,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:36:36,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:36:36,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:36:36,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:36:36,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:36:36,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (1/1) ... [2021-11-22 15:36:36,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:36:36,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:36:36,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:36:36,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:36:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:36:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 15:36:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:36:36,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:36:37,028 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:36:37,030 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:36:47,007 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:36:47,013 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:36:47,014 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:36:47,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:36:47 BoogieIcfgContainer [2021-11-22 15:36:47,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:36:47,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:36:47,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:36:47,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:36:47,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:36:36" (1/3) ... [2021-11-22 15:36:47,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22eb19de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:36:47, skipping insertion in model container [2021-11-22 15:36:47,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:36:36" (2/3) ... [2021-11-22 15:36:47,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22eb19de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:36:47, skipping insertion in model container [2021-11-22 15:36:47,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:36:47" (3/3) ... [2021-11-22 15:36:47,026 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_6.i [2021-11-22 15:36:47,032 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:36:47,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:36:47,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:36:47,095 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:36:47,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:36:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:36:47,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:47,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:47,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:47,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:47,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1947301547, now seen corresponding path program 1 times [2021-11-22 15:36:47,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:36:47,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351416828] [2021-11-22 15:36:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:47,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:36:47,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:36:47,149 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:36:47,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 15:36:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:47,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:36:47,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:36:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:47,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:36:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:47,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:36:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351416828] [2021-11-22 15:36:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351416828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:47,913 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:47,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 15:36:47,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751092392] [2021-11-22 15:36:47,916 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:47,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:36:47,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:36:47,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:36:47,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:36:47,957 INFO L87 Difference]: Start difference. First operand has 29 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:48,274 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-11-22 15:36:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:36:48,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 15:36:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:48,287 INFO L225 Difference]: With dead ends: 84 [2021-11-22 15:36:48,287 INFO L226 Difference]: Without dead ends: 28 [2021-11-22 15:36:48,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:36:48,297 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:48,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 101 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:36:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-22 15:36:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-11-22 15:36:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-22 15:36:48,344 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2021-11-22 15:36:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:48,344 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-22 15:36:48,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-22 15:36:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:36:48,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:48,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:48,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-22 15:36:48,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:36:48,547 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1538319123, now seen corresponding path program 1 times [2021-11-22 15:36:48,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:36:48,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977535639] [2021-11-22 15:36:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:48,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:36:48,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:36:48,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:36:48,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 15:36:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:36:48,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:36:48,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:36:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:49,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:36:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:36:50,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 15:36:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977535639] [2021-11-22 15:36:50,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977535639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 15:36:50,106 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:36:50,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-22 15:36:50,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968431062] [2021-11-22 15:36:50,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 15:36:50,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:36:50,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 15:36:50,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:36:50,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:36:50,111 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:36:50,994 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-22 15:36:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:36:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 15:36:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:36:50,996 INFO L225 Difference]: With dead ends: 28 [2021-11-22 15:36:50,996 INFO L226 Difference]: Without dead ends: 22 [2021-11-22 15:36:50,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:36:50,999 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:36:51,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 111 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:36:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-22 15:36:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-22 15:36:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-22 15:36:51,007 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2021-11-22 15:36:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:36:51,007 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-22 15:36:51,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:36:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-22 15:36:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:36:51,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:36:51,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:36:51,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:36:51,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 15:36:51,227 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:36:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:36:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash -19206151, now seen corresponding path program 1 times [2021-11-22 15:36:51,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 15:36:51,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798840412] [2021-11-22 15:36:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:36:51,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 15:36:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 15:36:51,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 15:36:51,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99334876-8e56-4e11-8e67-71da2ce79770/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process