./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa --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 e401cb5a55548693b1ec0dc85ab970a5c443ca7f94bea25587ee110941770f7d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 16:58:51,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 16:58:51,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 16:58:51,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 16:58:51,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 16:58:51,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 16:58:51,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 16:58:51,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 16:58:51,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 16:58:51,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 16:58:51,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 16:58:51,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 16:58:51,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 16:58:51,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 16:58:51,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 16:58:51,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 16:58:51,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 16:58:51,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 16:58:51,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 16:58:51,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 16:58:51,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 16:58:51,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 16:58:51,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 16:58:51,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 16:58:51,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 16:58:51,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 16:58:51,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 16:58:51,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 16:58:51,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 16:58:51,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 16:58:51,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 16:58:51,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 16:58:51,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 16:58:51,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 16:58:51,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 16:58:51,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 16:58:51,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 16:58:51,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 16:58:51,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 16:58:51,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 16:58:51,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 16:58:51,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 16:58:51,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 16:58:51,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 16:58:51,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 16:58:51,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 16:58:51,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 16:58:51,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 16:58:51,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 16:58:51,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 16:58:51,334 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 16:58:51,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 16:58:51,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 16:58:51,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 16:58:51,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 16:58:51,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 16:58:51,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 16:58:51,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 16:58:51,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 16:58:51,336 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 16:58:51,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 16:58:51,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 16:58:51,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 16:58:51,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 16:58:51,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 16:58:51,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 16:58:51,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:58:51,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 16:58:51,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 16:58:51,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 16:58:51,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 16:58:51,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 16:58:51,348 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 16:58:51,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 16:58:51,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 16:58:51,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 16:58:51,348 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_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e401cb5a55548693b1ec0dc85ab970a5c443ca7f94bea25587ee110941770f7d [2021-12-06 16:58:51,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 16:58:51,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 16:58:51,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 16:58:51,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 16:58:51,548 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 16:58:51,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_3+newton_2_3.i [2021-12-06 16:58:51,588 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/data/e3a926fc2/5a0775ad99244634bd4ec9c04db58ec2/FLAGf11d46886 [2021-12-06 16:58:51,956 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 16:58:51,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i [2021-12-06 16:58:51,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/data/e3a926fc2/5a0775ad99244634bd4ec9c04db58ec2/FLAGf11d46886 [2021-12-06 16:58:51,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/data/e3a926fc2/5a0775ad99244634bd4ec9c04db58ec2 [2021-12-06 16:58:51,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 16:58:51,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 16:58:51,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 16:58:51,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 16:58:51,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 16:58:51,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697abb4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:51, skipping insertion in model container [2021-12-06 16:58:51,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:58:51" (1/1) ... [2021-12-06 16:58:51,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 16:58:51,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 16:58:52,116 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_c4efd182-3647-4095-8251-d8b33f8b0650/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i[1226,1239] [2021-12-06 16:58:52,135 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_c4efd182-3647-4095-8251-d8b33f8b0650/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i[2841,2854] [2021-12-06 16:58:52,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:58:52,142 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 16:58:52,151 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_c4efd182-3647-4095-8251-d8b33f8b0650/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i[1226,1239] [2021-12-06 16:58:52,160 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_c4efd182-3647-4095-8251-d8b33f8b0650/sv-benchmarks/c/combinations/gcd_3+newton_2_3.i[2841,2854] [2021-12-06 16:58:52,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 16:58:52,171 INFO L208 MainTranslator]: Completed translation [2021-12-06 16:58:52,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52 WrapperNode [2021-12-06 16:58:52,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 16:58:52,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 16:58:52,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 16:58:52,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 16:58:52,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,199 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-06 16:58:52,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 16:58:52,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 16:58:52,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 16:58:52,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 16:58:52,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 16:58:52,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 16:58:52,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 16:58:52,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 16:58:52,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (1/1) ... [2021-12-06 16:58:52,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 16:58:52,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:52,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 16:58:52,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 16:58:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 16:58:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-06 16:58:52,284 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-06 16:58:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-06 16:58:52,284 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-06 16:58:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 16:58:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 16:58:52,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 16:58:52,343 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 16:58:52,345 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 16:58:52,459 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 16:58:52,464 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 16:58:52,465 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 16:58:52,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:58:52 BoogieIcfgContainer [2021-12-06 16:58:52,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 16:58:52,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 16:58:52,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 16:58:52,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 16:58:52,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 04:58:51" (1/3) ... [2021-12-06 16:58:52,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c28aea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:58:52, skipping insertion in model container [2021-12-06 16:58:52,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:58:52" (2/3) ... [2021-12-06 16:58:52,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c28aea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:58:52, skipping insertion in model container [2021-12-06 16:58:52,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:58:52" (3/3) ... [2021-12-06 16:58:52,472 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_3.i [2021-12-06 16:58:52,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 16:58:52,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 16:58:52,511 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 16:58:52,517 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 [2021-12-06 16:58:52,517 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 16:58:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 16:58:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 16:58:52,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:52,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:52,535 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-06 16:58:52,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:52,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222377002] [2021-12-06 16:58:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:52,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:52,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:52,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222377002] [2021-12-06 16:58:52,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222377002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:58:52,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:58:52,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 16:58:52,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456242585] [2021-12-06 16:58:52,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:58:52,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 16:58:52,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:52,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 16:58:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 16:58:52,735 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2021-12-06 16:58:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:52,784 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-06 16:58:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 16:58:52,786 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 [2021-12-06 16:58:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:52,792 INFO L225 Difference]: With dead ends: 90 [2021-12-06 16:58:52,792 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 16:58:52,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 16:58:52,799 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:52,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:58:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 16:58:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-06 16:58:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 16:58:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-06 16:58:52,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-12-06 16:58:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:52,833 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-06 16:58:52,833 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) [2021-12-06 16:58:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-06 16:58:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 16:58:52,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:52,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:52,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 16:58:52,836 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-06 16:58:52,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:52,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821708405] [2021-12-06 16:58:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:52,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:58:52,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:58:52,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821708405] [2021-12-06 16:58:52,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821708405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 16:58:52,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 16:58:52,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 16:58:52,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265649377] [2021-12-06 16:58:52,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 16:58:52,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 16:58:52,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:58:52,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 16:58:52,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 16:58:52,909 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:58:52,964 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-06 16:58:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 16:58:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 16:58:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:58:52,965 INFO L225 Difference]: With dead ends: 36 [2021-12-06 16:58:52,965 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 16:58:52,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 16:58:52,968 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:58:52,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 16:58:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 16:58:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 16:58:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 16:58:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-06 16:58:52,975 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-06 16:58:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:58:52,976 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-06 16:58:52,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 16:58:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-06 16:58:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 16:58:52,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:58:52,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:58:52,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 16:58:52,978 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:58:52,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:58:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-06 16:58:52,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:58:52,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88098709] [2021-12-06 16:58:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:52,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:58:52,995 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 16:58:52,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759183327] [2021-12-06 16:58:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:58:52,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:58:52,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:58:52,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:58:52,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 16:58:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 16:58:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 16:58:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:19,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 16:59:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:21,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 16:59:21,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88098709] [2021-12-06 16:59:21,797 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 16:59:21,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759183327] [2021-12-06 16:59:21,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759183327] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 16:59:21,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 16:59:21,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-06 16:59:21,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617373488] [2021-12-06 16:59:21,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 16:59:21,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 16:59:21,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 16:59:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 16:59:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=208, Unknown=10, NotChecked=0, Total=272 [2021-12-06 16:59:21,799 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-12-06 16:59:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 16:59:24,407 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-06 16:59:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 16:59:24,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 [2021-12-06 16:59:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 16:59:24,409 INFO L225 Difference]: With dead ends: 42 [2021-12-06 16:59:24,409 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 16:59:24,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=74, Invalid=258, Unknown=10, NotChecked=0, Total=342 [2021-12-06 16:59:24,411 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 16:59:24,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-06 16:59:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 16:59:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-06 16:59:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 16:59:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-06 16:59:24,417 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-06 16:59:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 16:59:24,417 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-06 16:59:24,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-12-06 16:59:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-06 16:59:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 16:59:24,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 16:59:24,418 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 16:59:24,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 16:59:24,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:24,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 16:59:24,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 16:59:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-12-06 16:59:24,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 16:59:24,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173152289] [2021-12-06 16:59:24,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 16:59:24,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 16:59:24,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 16:59:24,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692043179] [2021-12-06 16:59:24,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 16:59:24,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 16:59:24,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 16:59:24,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 16:59:24,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 16:59:24,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 16:59:24,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 16:59:24,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 16:59:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 16:59:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 16:59:27,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:00:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:00:00,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:00:00,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173152289] [2021-12-06 17:00:00,242 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:00:00,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692043179] [2021-12-06 17:00:00,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692043179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:00:00,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:00:00,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-06 17:00:00,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932241246] [2021-12-06 17:00:00,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:00:00,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:00:00,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:00:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:00:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=182, Unknown=9, NotChecked=0, Total=240 [2021-12-06 17:00:00,244 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2021-12-06 17:00:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:00:00,459 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-06 17:00:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:00:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 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 [2021-12-06 17:00:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:00:00,460 INFO L225 Difference]: With dead ends: 43 [2021-12-06 17:00:00,460 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 17:00:00,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=49, Invalid=182, Unknown=9, NotChecked=0, Total=240 [2021-12-06 17:00:00,461 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:00:00,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-06 17:00:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 17:00:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 17:00:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:00:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-06 17:00:00,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-12-06 17:00:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:00:00,467 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-06 17:00:00,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2021-12-06 17:00:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-06 17:00:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:00:00,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:00:00,468 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:00:00,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 17:00:00,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 17:00:00,669 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:00:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:00:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-12-06 17:00:00,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:00:00,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102692292] [2021-12-06 17:00:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:00:00,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:00:00,688 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:00:00,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056389016] [2021-12-06 17:00:00,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:00:00,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:00:00,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:00:00,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:00:00,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:00:00,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:00:00,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:00:00,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:00:00,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:00:44,577 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse4) 256))) (let ((.cse3 (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse2 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse3 256)) (= (mod (mod .cse4 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse4 127) (= .cse3 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse9 (+ .cse5 (- 256)))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (let ((.cse6 (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (mod .cse9 .cse8))) (and (< 127 .cse5) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse6 256)) (not (= .cse7 0)) (not (= .cse8 0)) (= .cse6 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse8 255) .cse7) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse10 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse13 (+ .cse10 (- 256)))) (let ((.cse11 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse12 (mod .cse13 .cse11))) (and (< 127 .cse10) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse11 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse12 0)) (not (= .cse11 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse11 255) .cse12) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-12-06 17:00:46,968 WARN L860 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse4) 256))) (let ((.cse3 (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse2 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse3 256)) (= (mod (mod .cse4 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse4 127) (= .cse3 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse9 (+ .cse5 (- 256)))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (let ((.cse6 (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (mod .cse9 .cse8))) (and (< 127 .cse5) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse6 256)) (not (= .cse7 0)) (not (= .cse8 0)) (= .cse6 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse8 255) .cse7) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse10 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse13 (+ .cse10 (- 256)))) (let ((.cse11 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse12 (mod .cse13 .cse11))) (and (< 127 .cse10) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse11 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse12 0)) (not (= .cse11 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse11 255) .cse12) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from true [2021-12-06 17:00:51,101 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127) (= (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse3 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (and (not (= .cse2 0)) (= (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (mod (mod .cse3 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse3 127))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse5 (mod .cse7 .cse6))) (and (< 127 .cse4) (not (= .cse5 0)) (not (= .cse6 0)) (= (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse6 255) .cse5) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse8 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse11 (+ .cse8 (- 256)))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (let ((.cse9 (mod .cse11 .cse10))) (and (< 127 .cse8) (not (= .cse9 0)) (not (= .cse10 0)) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse10 255) .cse9) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-12-06 17:01:31,436 WARN L227 SmtUtils]: Spent 29.22s on a formula simplification. DAG size of input: 59 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:01:58,115 WARN L227 SmtUtils]: Spent 17.08s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:02:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 17:02:03,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:04:11,552 WARN L227 SmtUtils]: Spent 1.59m on a formula simplification. DAG size of input: 82 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:05:55,332 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse18 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256))) (let ((.cse27 (+ (- 256) .cse24))) (let ((.cse25 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256)) (.cse26 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256))) (let ((.cse3 (not (= (mod (mod .cse27 .cse26) 256) 0))) (.cse5 (<= .cse26 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse13 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (= .cse24 0)) (.cse10 (not (= (mod (mod .cse24 .cse25) 256) 0))) (.cse11 (<= .cse25 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse12 (or .cse4 .cse9 .cse10 .cse11)) (.cse14 (< 127 .cse24)) (.cse8 (<= .cse13 127)) (.cse1 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse7 (or .cse3 .cse4 .cse5)) (.cse0 (<= .cse24 127)) (.cse17 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse16 (mod .cse18 256))) (and (or (let ((.cse6 (= .cse18 0)) (.cse2 (let ((.cse15 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256))) (or (<= .cse15 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse15) 256) 0)) .cse17 (= 0 .cse16))))) (and (or .cse0 (and (or .cse1 (and .cse2 (or .cse3 .cse4 .cse5 .cse6))) (or (and .cse7 .cse2) .cse1 .cse8))) (or (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse6) .cse2) .cse1) (or .cse1 (and .cse12 .cse2) (< 127 .cse13))) .cse14))) (< 127 .cse16)) (or (<= .cse16 127) (let ((.cse20 (let ((.cse22 (+ (- 256) .cse16))) (let ((.cse23 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256))) (or (not (= (mod (mod .cse22 .cse23) 256) 0)) .cse17 (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (let ((.cse19 (and .cse12 .cse20))) (and (or .cse1 .cse8 .cse19) (or .cse1 .cse19))) .cse14) (or (let ((.cse21 (and .cse7 .cse20))) (and (or .cse21 .cse1 .cse8) (or .cse21 .cse1))) .cse0)))))))))))) is different from true [2021-12-06 17:06:38,470 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse2 (mod (* |ULTIMATE.start_gcd_test_~b#1| 255) 256))) (or (let ((.cse3 (mod |c_ULTIMATE.start_gcd_test_~a#1| .cse2))) (and (let ((.cse0 (mod .cse3 256))) (let ((.cse1 (mod (mod .cse2 .cse0) 256))) (or (not (= (mod (mod .cse0 .cse1) 256) 0)) (<= .cse1 |c_ULTIMATE.start_main1_~x~0#1|) (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (= .cse0 0)))) (let ((.cse5 (+ (- 256) (mod (+ .cse3 (* .cse2 255)) 256)))) (let ((.cse4 (mod (mod .cse2 .cse5) 256))) (or (<= .cse4 |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= (mod (mod .cse5 .cse4) 256) 0))))))) (< 127 .cse2))))) is different from true [2021-12-06 17:06:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 17:06:44,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:06:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102692292] [2021-12-06 17:06:44,756 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:06:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056389016] [2021-12-06 17:06:44,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056389016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:06:44,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:06:44,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-06 17:06:44,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280560771] [2021-12-06 17:06:44,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:06:44,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:06:44,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:06:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:06:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=202, Unknown=18, NotChecked=132, Total=420 [2021-12-06 17:06:44,758 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-06 17:06:49,439 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0))) (and (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or .cse0 (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0))) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse2 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse2) 256))) (and (not (= .cse1 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse1 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse2 .cse1) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse2 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse5) 256))) (let ((.cse4 (mod .cse3 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse3 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse4 256)) (= (mod (mod .cse5 .cse3) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse5 127) (= .cse4 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse6 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse10 (+ .cse6 (- 256)))) (let ((.cse9 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse10) 256))) (let ((.cse7 (mod .cse9 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse8 (mod .cse10 .cse9))) (and (< 127 .cse6) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256)) (not (= .cse8 0)) (not (= .cse9 0)) (= .cse7 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse9 255) .cse8) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse11 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse14 (+ .cse11 (- 256)))) (let ((.cse12 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse14) 256))) (let ((.cse13 (mod .cse14 .cse12))) (and (< 127 .cse11) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse13 0)) (not (= .cse12 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse12 255) .cse13) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)))) is different from false [2021-12-06 17:06:51,452 WARN L838 $PredicateComparison]: unable to prove that (and (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127) (= (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse3 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (and (not (= .cse2 0)) (= (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (mod (mod .cse3 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse3 127))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse5 (mod .cse7 .cse6))) (and (< 127 .cse4) (not (= .cse5 0)) (not (= .cse6 0)) (= (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse6 255) .cse5) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse8 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse11 (+ .cse8 (- 256)))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (let ((.cse9 (mod .cse11 .cse10))) (and (< 127 .cse8) (not (= .cse9 0)) (not (= .cse10 0)) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse10 255) .cse9) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-12-06 17:06:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:06:51,464 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-12-06 17:06:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:06:51,464 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 14 [2021-12-06 17:06:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:06:51,465 INFO L225 Difference]: With dead ends: 45 [2021-12-06 17:06:51,465 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 17:06:51,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 223.2s TimeCoverageRelationStatistics Valid=81, Invalid=229, Unknown=20, NotChecked=222, Total=552 [2021-12-06 17:06:51,466 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:06:51,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 241 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 103 Unchecked, 0.0s Time] [2021-12-06 17:06:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 17:06:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-12-06 17:06:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:06:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-06 17:06:51,470 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 14 [2021-12-06 17:06:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:06:51,471 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-06 17:06:51,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-12-06 17:06:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-06 17:06:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:06:51,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:06:51,471 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:06:51,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:06:51,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:51,673 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:06:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:06:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1911673028, now seen corresponding path program 1 times [2021-12-06 17:06:51,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:06:51,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368321128] [2021-12-06 17:06:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:51,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:06:51,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:06:51,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447261010] [2021-12-06 17:06:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:51,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:51,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:06:51,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:06:51,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4efd182-3647-4095-8251-d8b33f8b0650/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:06:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:06:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:07:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:07:12,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:08:32,209 WARN L227 SmtUtils]: Spent 54.29s on a formula simplification. DAG size of input: 75 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)