./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_3_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_3_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G --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 3c7e4faaabab9b2f322684d2701654a5044e8a4a6ec20b8d467b524bec442165 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:11:49,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:11:49,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:11:49,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:11:49,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:11:49,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:11:49,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:11:49,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:11:49,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:11:49,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:11:49,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:11:49,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:11:49,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:11:49,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:11:49,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:11:49,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:11:49,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:11:49,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:11:49,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:11:49,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:11:49,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:11:49,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:11:49,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:11:49,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:11:49,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:11:49,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:11:49,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:11:49,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:11:49,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:11:49,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:11:49,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:11:49,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:11:49,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:11:49,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:11:49,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:11:49,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:11:49,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:11:49,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:11:49,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:11:49,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:11:49,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:11:49,252 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:11:49,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:11:49,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:11:49,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:11:49,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:11:49,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:11:49,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:11:49,305 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:11:49,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:11:49,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:11:49,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:11:49,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:11:49,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:11:49,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:11:49,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:11:49,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:11:49,308 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:11:49,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:11:49,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:11:49,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:11:49,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:11:49,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:11:49,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:11:49,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:11:49,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:11:49,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:11:49,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:11:49,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:11:49,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:11:49,311 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:11:49,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:11:49,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:11:49,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:11:49,313 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c7e4faaabab9b2f322684d2701654a5044e8a4a6ec20b8d467b524bec442165 [2021-11-23 13:11:49,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:11:49,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:11:49,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:11:49,605 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:11:49,606 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:11:49,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/gcd_2+newton_3_5.i [2021-11-23 13:11:49,672 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data/ef4e9fa79/09942b90d74d4181b9def81fd3047be0/FLAG4efde7017 [2021-11-23 13:11:50,178 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:11:50,179 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i [2021-11-23 13:11:50,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data/ef4e9fa79/09942b90d74d4181b9def81fd3047be0/FLAG4efde7017 [2021-11-23 13:11:50,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data/ef4e9fa79/09942b90d74d4181b9def81fd3047be0 [2021-11-23 13:11:50,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:11:50,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:11:50,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:11:50,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:11:50,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:11:50,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cd47195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50, skipping insertion in model container [2021-11-23 13:11:50,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:11:50,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:11:50,752 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i[1226,1239] [2021-11-23 13:11:50,781 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i[2862,2875] [2021-11-23 13:11:50,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:11:50,791 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:11:50,804 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i[1226,1239] [2021-11-23 13:11:50,816 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i[2862,2875] [2021-11-23 13:11:50,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:11:50,832 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:11:50,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50 WrapperNode [2021-11-23 13:11:50,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:11:50,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:11:50,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:11:50,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:11:50,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,878 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 100 [2021-11-23 13:11:50,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:11:50,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:11:50,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:11:50,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:11:50,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:11:50,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:11:50,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:11:50,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:11:50,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (1/1) ... [2021-11-23 13:11:50,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:11:50,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:11:50,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:11:50,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:11:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:11:51,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:11:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:11:51,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:11:51,096 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:11:51,098 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:11:51,301 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:11:51,307 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:11:51,307 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 13:11:51,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:11:51 BoogieIcfgContainer [2021-11-23 13:11:51,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:11:51,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:11:51,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:11:51,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:11:51,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:11:50" (1/3) ... [2021-11-23 13:11:51,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5169b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:11:51, skipping insertion in model container [2021-11-23 13:11:51,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:11:50" (2/3) ... [2021-11-23 13:11:51,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5169b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:11:51, skipping insertion in model container [2021-11-23 13:11:51,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:11:51" (3/3) ... [2021-11-23 13:11:51,318 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_3_5.i [2021-11-23 13:11:51,324 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:11:51,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 13:11:51,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:11:51,426 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 [2021-11-23 13:11:51,438 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 13:11:51,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-11-23 13:11:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:11:51,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:51,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:51,493 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:11:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1947301547, now seen corresponding path program 1 times [2021-11-23 13:11:51,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:51,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801289718] [2021-11-23 13:11:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:51,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:51,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:51,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801289718] [2021-11-23 13:11:51,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801289718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:11:51,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:11:51,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:11:51,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613818048] [2021-11-23 13:11:51,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:11:51,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:11:51,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:11:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:11:51,768 INFO L87 Difference]: Start difference. First operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-11-23 13:11:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:51,839 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-11-23 13:11:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:11:51,842 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 [2021-11-23 13:11:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:51,849 INFO L225 Difference]: With dead ends: 73 [2021-11-23 13:11:51,849 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 13:11:51,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:11:51,858 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:51,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 87 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:11:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 13:11:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 13:11:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-11-23 13:11:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-23 13:11:51,907 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2021-11-23 13:11:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:51,908 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-23 13:11:51,909 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) [2021-11-23 13:11:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-23 13:11:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:11:51,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:51,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:51,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:11:51,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:11:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1364487322, now seen corresponding path program 1 times [2021-11-23 13:11:51,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:51,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402861934] [2021-11-23 13:11:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:51,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:51,933 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:11:51,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869780964] [2021-11-23 13:11:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:51,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:51,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:11:51,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:11:51,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:11:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:11:52,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:11:52,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:11:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:52,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:11:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:11:52,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:11:52,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402861934] [2021-11-23 13:11:52,372 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:11:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869780964] [2021-11-23 13:11:52,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869780964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:11:52,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:11:52,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-23 13:11:52,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540373670] [2021-11-23 13:11:52,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:11:52,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:11:52,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:11:52,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:11:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:11:52,375 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-23 13:11:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:11:52,483 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-23 13:11:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:11:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 12 [2021-11-23 13:11:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:11:52,487 INFO L225 Difference]: With dead ends: 31 [2021-11-23 13:11:52,487 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 13:11:52,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:11:52,498 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:11:52,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:11:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 13:11:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 13:11:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-11-23 13:11:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-23 13:11:52,519 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2021-11-23 13:11:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:11:52,520 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-23 13:11:52,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-23 13:11:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-23 13:11:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:11:52,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:11:52,527 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:11:52,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:11:52,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 13:11:52,743 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:11:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:11:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash 950727157, now seen corresponding path program 2 times [2021-11-23 13:11:52,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:11:52,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908502033] [2021-11-23 13:11:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:11:52,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:11:52,760 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:11:52,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709827660] [2021-11-23 13:11:52,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:11:52,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:11:52,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:11:52,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:11:52,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:11:52,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:11:52,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:11:52,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:11:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:47,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:07,261 WARN L227 SmtUtils]: Spent 6.61s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:14:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:14:32,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908502033] [2021-11-23 13:14:32,190 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:14:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709827660] [2021-11-23 13:14:32,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709827660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:32,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:14:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-23 13:14:32,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410077861] [2021-11-23 13:14:32,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:32,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:14:32,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:14:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=204, Unknown=17, NotChecked=0, Total=272 [2021-11-23 13:14:32,193 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-11-23 13:14:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:53,738 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-23 13:14:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:14:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) Word has length 13 [2021-11-23 13:14:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:53,739 INFO L225 Difference]: With dead ends: 36 [2021-11-23 13:14:53,740 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 13:14:53,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 88.6s TimeCoverageRelationStatistics Valid=65, Invalid=258, Unknown=19, NotChecked=0, Total=342 [2021-11-23 13:14:53,742 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:53,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 150 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-11-23 13:14:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 13:14:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 13:14:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-11-23 13:14:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-23 13:14:53,753 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 13 [2021-11-23 13:14:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:53,754 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-23 13:14:53,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-11-23 13:14:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-23 13:14:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:14:53,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:53,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:53,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:53,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:53,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:14:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1277269317, now seen corresponding path program 1 times [2021-11-23 13:14:53,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:53,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479676740] [2021-11-23 13:14:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:53,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:14:54,006 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 13:14:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 13:14:54,034 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 13:14:54,035 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 13:14:54,037 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 13:14:54,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 13:14:54,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:14:54,051 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2021-11-23 13:14:54,055 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:14:54,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:14:54 BoogieIcfgContainer [2021-11-23 13:14:54,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:14:54,084 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:14:54,084 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:14:54,084 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:14:54,085 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:11:51" (3/4) ... [2021-11-23 13:14:54,088 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 13:14:54,089 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:14:54,090 INFO L158 Benchmark]: Toolchain (without parser) took 183571.68ms. Allocated memory was 88.1MB in the beginning and 167.8MB in the end (delta: 79.7MB). Free memory was 46.5MB in the beginning and 44.6MB in the end (delta: 1.9MB). Peak memory consumption was 80.7MB. Max. memory is 16.1GB. [2021-11-23 13:14:54,090 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 88.1MB. Free memory was 62.7MB in the beginning and 62.6MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:14:54,091 INFO L158 Benchmark]: CACSL2BoogieTranslator took 313.60ms. Allocated memory is still 88.1MB. Free memory was 46.3MB in the beginning and 61.0MB in the end (delta: -14.7MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2021-11-23 13:14:54,091 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.15ms. Allocated memory is still 88.1MB. Free memory was 60.8MB in the beginning and 58.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:14:54,092 INFO L158 Benchmark]: Boogie Preprocessor took 28.21ms. Allocated memory is still 88.1MB. Free memory was 58.8MB in the beginning and 57.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:14:54,092 INFO L158 Benchmark]: RCFGBuilder took 400.84ms. Allocated memory is still 88.1MB. Free memory was 57.4MB in the beginning and 46.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 13:14:54,093 INFO L158 Benchmark]: TraceAbstraction took 182772.17ms. Allocated memory was 88.1MB in the beginning and 167.8MB in the end (delta: 79.7MB). Free memory was 46.1MB in the beginning and 44.6MB in the end (delta: 1.5MB). Peak memory consumption was 82.6MB. Max. memory is 16.1GB. [2021-11-23 13:14:54,093 INFO L158 Benchmark]: Witness Printer took 5.04ms. Allocated memory is still 167.8MB. Free memory is still 44.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:14:54,096 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 88.1MB. Free memory was 62.7MB in the beginning and 62.6MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 313.60ms. Allocated memory is still 88.1MB. Free memory was 46.3MB in the beginning and 61.0MB in the end (delta: -14.7MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.15ms. Allocated memory is still 88.1MB. Free memory was 60.8MB in the beginning and 58.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.21ms. Allocated memory is still 88.1MB. Free memory was 58.8MB in the beginning and 57.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 400.84ms. Allocated memory is still 88.1MB. Free memory was 57.4MB in the beginning and 46.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 182772.17ms. Allocated memory was 88.1MB in the beginning and 167.8MB in the end (delta: 79.7MB). Free memory was 46.1MB in the beginning and 44.6MB in the end (delta: 1.5MB). Peak memory consumption was 82.6MB. Max. memory is 16.1GB. * Witness Printer took 5.04ms. Allocated memory is still 167.8MB. Free memory is still 44.6MB. 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 97. Possible FailurePath: [L108] COND FALSE !(__VERIFIER_nondet_int()) [L111] CALL main2() [L90] float IN = __VERIFIER_nondet_float(); [L91] CALL assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L75] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L91] RET assume_abort_if_not(IN > -1.0f && IN < 1.0f) [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)=52, x=52] [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)=52, x=52] [L95] RET, EXPR fp(x) [L95] x = x - f(x)/fp(x) [L97] 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] [L97] RET, EXPR f(x) [L97] 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] [L97] RET, EXPR fp(x) [L97] 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, 31 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 182.6s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 21.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 342 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 273 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 67 IncrementalHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 69 mSDtfsCounter, 67 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 88.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 26, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 159.8s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 56 ConstructedInterpolants, 8 QuantifiedInterpolants, 1043 SizeOfPredicates, 17 NumberOfNonLiveVariables, 141 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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 [2021-11-23 13:14:54,346 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-23 13:14:54,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_3_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G --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 3c7e4faaabab9b2f322684d2701654a5044e8a4a6ec20b8d467b524bec442165 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:14:56,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:14:56,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:14:56,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:14:56,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:14:56,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:14:56,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:14:56,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:14:56,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:14:56,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:14:56,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:14:56,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:14:56,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:14:56,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:14:56,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:14:56,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:14:56,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:14:56,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:14:56,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:14:56,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:14:56,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:14:56,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:14:56,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:14:56,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:14:56,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:14:56,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:14:56,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:14:56,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:14:56,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:14:56,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:14:56,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:14:56,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:14:56,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:14:56,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:14:56,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:14:56,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:14:56,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:14:56,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:14:56,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:14:56,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:14:56,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:14:56,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-23 13:14:56,949 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:14:56,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:14:56,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:14:56,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:14:56,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:14:56,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:14:56,954 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:14:56,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:14:56,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:14:56,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:14:56,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:14:56,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:14:56,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:14:56,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:14:56,957 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:14:56,958 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 13:14:56,958 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 13:14:56,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:14:56,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:14:56,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:14:56,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:14:56,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:14:56,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:14:56,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:14:56,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:14:56,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:14:56,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:14:56,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:14:56,961 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 13:14:56,961 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 13:14:56,961 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:14:56,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:14:56,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:14:56,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:14:56,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 13:14:56,962 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c7e4faaabab9b2f322684d2701654a5044e8a4a6ec20b8d467b524bec442165 [2021-11-23 13:14:57,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:14:57,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:14:57,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:14:57,414 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:14:57,415 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:14:57,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/gcd_2+newton_3_5.i [2021-11-23 13:14:57,499 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data/7a4d95bae/4d018dcdb9e64ac0b83fba65e4117889/FLAG0313c6c69 [2021-11-23 13:14:58,189 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:14:58,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i [2021-11-23 13:14:58,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data/7a4d95bae/4d018dcdb9e64ac0b83fba65e4117889/FLAG0313c6c69 [2021-11-23 13:14:58,518 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/data/7a4d95bae/4d018dcdb9e64ac0b83fba65e4117889 [2021-11-23 13:14:58,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:14:58,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:14:58,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:14:58,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:14:58,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:14:58,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:14:58" (1/1) ... [2021-11-23 13:14:58,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a95d392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:58, skipping insertion in model container [2021-11-23 13:14:58,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:14:58" (1/1) ... [2021-11-23 13:14:58,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:14:58,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:14:58,822 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i[1226,1239] [2021-11-23 13:14:58,901 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i[2862,2875] [2021-11-23 13:14:58,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:14:58,949 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:14:58,971 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i[1226,1239] [2021-11-23 13:14:58,996 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_2377301f-10b2-44c4-a7a0-f3344c1b684e/sv-benchmarks/c/combinations/gcd_2+newton_3_5.i[2862,2875] [2021-11-23 13:14:59,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:14:59,020 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:14:59,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59 WrapperNode [2021-11-23 13:14:59,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:14:59,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:14:59,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:14:59,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:14:59,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,091 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 95 [2021-11-23 13:14:59,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:14:59,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:14:59,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:14:59,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:14:59,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:14:59,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:14:59,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:14:59,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:14:59,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (1/1) ... [2021-11-23 13:14:59,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:14:59,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:59,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:14:59,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:14:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:14:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 13:14:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:14:59,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:14:59,383 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:14:59,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:15:14,663 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:15:14,670 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:15:14,670 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 13:15:14,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:15:14 BoogieIcfgContainer [2021-11-23 13:15:14,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:15:14,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:15:14,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:15:14,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:15:14,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:14:58" (1/3) ... [2021-11-23 13:15:14,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d044ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:15:14, skipping insertion in model container [2021-11-23 13:15:14,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:14:59" (2/3) ... [2021-11-23 13:15:14,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d044ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:15:14, skipping insertion in model container [2021-11-23 13:15:14,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:15:14" (3/3) ... [2021-11-23 13:15:14,682 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_3_5.i [2021-11-23 13:15:14,688 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:15:14,688 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 13:15:14,747 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:15:14,756 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 [2021-11-23 13:15:14,756 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 13:15:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-11-23 13:15:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:15:14,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:14,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:14,799 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:15:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1947301547, now seen corresponding path program 1 times [2021-11-23 13:15:14,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:15:14,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77072462] [2021-11-23 13:15:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:14,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:15:14,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:15:14,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:15:14,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 13:15:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:15:14,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:15:15,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:15:15,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:15:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77072462] [2021-11-23 13:15:15,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77072462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 13:15:15,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:15:15,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 13:15:15,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934112923] [2021-11-23 13:15:15,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 13:15:15,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:15:15,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:15:15,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:15:15,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:15:15,894 INFO L87 Difference]: Start difference. First operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-11-23 13:15:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:16,283 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-11-23 13:15:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:15:16,287 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 [2021-11-23 13:15:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:16,297 INFO L225 Difference]: With dead ends: 73 [2021-11-23 13:15:16,298 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 13:15:16,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:15:16,310 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:16,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:15:16,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 13:15:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 13:15:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-11-23 13:15:16,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-23 13:15:16,368 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2021-11-23 13:15:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:16,369 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-23 13:15:16,369 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) [2021-11-23 13:15:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-23 13:15:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:15:16,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:16,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:16,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:16,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:15:16,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:15:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1364487322, now seen corresponding path program 1 times [2021-11-23 13:15:16,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:15:16,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13015448] [2021-11-23 13:15:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:16,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:15:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:15:16,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:15:16,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 13:15:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:16,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:15:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:15:17,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:15:18,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 13:15:18,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13015448] [2021-11-23 13:15:18,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13015448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:18,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:15:18,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-23 13:15:18,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660833293] [2021-11-23 13:15:18,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:18,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:15:18,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 13:15:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:15:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:15:18,748 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-11-23 13:15:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:22,035 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-23 13:15:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 13:15:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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 12 [2021-11-23 13:15:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:22,037 INFO L225 Difference]: With dead ends: 41 [2021-11-23 13:15:22,037 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 13:15:22,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:15:22,041 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:22,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 150 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 13:15:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 13:15:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 13:15:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-11-23 13:15:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-23 13:15:22,048 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2021-11-23 13:15:22,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:22,048 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-23 13:15:22,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-11-23 13:15:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-23 13:15:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:15:22,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:22,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:22,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 13:15:22,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 13:15:22,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:15:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1277269317, now seen corresponding path program 1 times [2021-11-23 13:15:22,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 13:15:22,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033850312] [2021-11-23 13:15:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:22,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 13:15:22,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 13:15:22,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 13:15:22,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2377301f-10b2-44c4-a7a0-f3344c1b684e/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process