./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF --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 7da096d64cf3390a2bb7c442378ab6f697dfdf0fd9d4078975ad6171409858bb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:43:46,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:43:46,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:43:46,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:43:46,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:43:46,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:43:46,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:43:46,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:43:46,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:43:46,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:43:46,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:43:46,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:43:46,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:43:46,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:43:46,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:43:46,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:43:46,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:43:46,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:43:46,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:43:46,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:43:46,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:43:46,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:43:46,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:43:46,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:43:46,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:43:46,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:43:46,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:43:46,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:43:46,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:43:46,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:43:46,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:43:46,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:43:46,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:43:46,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:43:46,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:43:46,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:43:46,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:43:46,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:43:46,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:43:46,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:43:46,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:43:46,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:43:46,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:43:46,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:43:46,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:43:46,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:43:46,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:43:46,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:43:46,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:43:46,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:43:46,338 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:43:46,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:43:46,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:43:46,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:43:46,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:43:46,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:43:46,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:43:46,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:43:46,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:43:46,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:43:46,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:43:46,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:43:46,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:43:46,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:43:46,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:43:46,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:43:46,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:43:46,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:43:46,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:43:46,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:43:46,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:43:46,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:43:46,349 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:43:46,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:43:46,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:43:46,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:43:46,350 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_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7da096d64cf3390a2bb7c442378ab6f697dfdf0fd9d4078975ad6171409858bb [2021-11-20 06:43:46,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:43:46,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:43:46,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:43:46,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:43:46,627 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:43:46,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/bitvector/gcd_2.c [2021-11-20 06:43:46,703 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/data/d56095622/465b63acae83412f8497b9bc68843b0e/FLAGdbb8311ab [2021-11-20 06:43:47,171 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:43:47,172 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/sv-benchmarks/c/bitvector/gcd_2.c [2021-11-20 06:43:47,189 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/data/d56095622/465b63acae83412f8497b9bc68843b0e/FLAGdbb8311ab [2021-11-20 06:43:47,552 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/data/d56095622/465b63acae83412f8497b9bc68843b0e [2021-11-20 06:43:47,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:43:47,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:43:47,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:43:47,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:43:47,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:43:47,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2087e5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47, skipping insertion in model container [2021-11-20 06:43:47,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:43:47,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:43:47,765 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/sv-benchmarks/c/bitvector/gcd_2.c[664,677] [2021-11-20 06:43:47,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:43:47,785 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:43:47,797 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_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/sv-benchmarks/c/bitvector/gcd_2.c[664,677] [2021-11-20 06:43:47,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:43:47,816 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:43:47,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47 WrapperNode [2021-11-20 06:43:47,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:43:47,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:43:47,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:43:47,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:43:47,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,850 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 47 [2021-11-20 06:43:47,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:43:47,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:43:47,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:43:47,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:43:47,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:43:47,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:43:47,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:43:47,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:43:47,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (1/1) ... [2021-11-20 06:43:47,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:43:47,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:47,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:43:47,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:43:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:43:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:43:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:43:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:43:47,999 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:43:48,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:43:48,110 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:43:48,116 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:43:48,117 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:43:48,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:43:48 BoogieIcfgContainer [2021-11-20 06:43:48,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:43:48,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:43:48,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:43:48,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:43:48,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:43:47" (1/3) ... [2021-11-20 06:43:48,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd4d648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:43:48, skipping insertion in model container [2021-11-20 06:43:48,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:43:47" (2/3) ... [2021-11-20 06:43:48,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd4d648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:43:48, skipping insertion in model container [2021-11-20 06:43:48,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:43:48" (3/3) ... [2021-11-20 06:43:48,128 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2.c [2021-11-20 06:43:48,134 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:43:48,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:43:48,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:43:48,202 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 [2021-11-20 06:43:48,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:43:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) [2021-11-20 06:43:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:43:48,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:48,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:48,246 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash 777289588, now seen corresponding path program 1 times [2021-11-20 06:43:48,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:48,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180875828] [2021-11-20 06:43:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:48,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:48,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:48,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180875828] [2021-11-20 06:43:48,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180875828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:48,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:48,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:48,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462394727] [2021-11-20 06:43:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:48,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:48,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:48,485 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-20 06:43:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:48,535 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-11-20 06:43:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-20 06:43:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:48,546 INFO L225 Difference]: With dead ends: 47 [2021-11-20 06:43:48,547 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 06:43:48,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:48,554 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:48,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 06:43:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11. [2021-11-20 06:43:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-11-20 06:43:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-20 06:43:48,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2021-11-20 06:43:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:48,588 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-20 06:43:48,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-20 06:43:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-20 06:43:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:43:48,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:48,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:48,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:43:48,590 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1742670346, now seen corresponding path program 1 times [2021-11-20 06:43:48,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964715883] [2021-11-20 06:43:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:48,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:48,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964715883] [2021-11-20 06:43:48,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964715883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:48,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:48,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:48,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691246266] [2021-11-20 06:43:48,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:48,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:48,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:48,700 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-20 06:43:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:48,753 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-20 06:43:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-20 06:43:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:48,754 INFO L225 Difference]: With dead ends: 18 [2021-11-20 06:43:48,754 INFO L226 Difference]: Without dead ends: 12 [2021-11-20 06:43:48,755 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 [2021-11-20 06:43:48,757 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:48,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:43:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-20 06:43:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-20 06:43:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-11-20 06:43:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-20 06:43:48,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-11-20 06:43:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:48,762 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-20 06:43:48,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-20 06:43:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-20 06:43:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:43:48,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:48,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:48,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:43:48,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash -881880042, now seen corresponding path program 1 times [2021-11-20 06:43:48,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:48,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234351744] [2021-11-20 06:43:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:48,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:48,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:48,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815198356] [2021-11-20 06:43:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:48,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:48,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:48,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:48,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:43:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:43:48,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:48,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:49,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234351744] [2021-11-20 06:43:49,087 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:43:49,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815198356] [2021-11-20 06:43:49,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815198356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:49,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:49,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-20 06:43:49,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979449922] [2021-11-20 06:43:49,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:49,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:43:49,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:49,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:43:49,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:43:49,091 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2021-11-20 06:43:49,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:49,195 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-20 06:43:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:43:49,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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 [2021-11-20 06:43:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:49,197 INFO L225 Difference]: With dead ends: 19 [2021-11-20 06:43:49,197 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 06:43:49,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:43:49,206 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 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 [2021-11-20 06:43:49,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 06:43:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-20 06:43:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-11-20 06:43:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-20 06:43:49,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-20 06:43:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:49,213 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-20 06:43:49,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2021-11-20 06:43:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-20 06:43:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:43:49,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:49,214 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:49,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:49,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 06:43:49,443 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:49,444 INFO L85 PathProgramCache]: Analyzing trace with hash 32815606, now seen corresponding path program 2 times [2021-11-20 06:43:49,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:49,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427993330] [2021-11-20 06:43:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:49,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:49,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:43:49,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096515862] [2021-11-20 06:43:49,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:43:49,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:43:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:43:49,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:43:49,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:43:49,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:43:49,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:43:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:57,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:44:08,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:08,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427993330] [2021-11-20 06:44:08,986 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:44:08,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096515862] [2021-11-20 06:44:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096515862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:08,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:08,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-20 06:44:08,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185721263] [2021-11-20 06:44:08,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:08,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:44:08,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:44:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:44:08,990 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2021-11-20 06:44:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:09,125 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-20 06:44:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:44:09,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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 [2021-11-20 06:44:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:09,126 INFO L225 Difference]: With dead ends: 20 [2021-11-20 06:44:09,126 INFO L226 Difference]: Without dead ends: 14 [2021-11-20 06:44:09,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:44:09,128 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:09,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-11-20 06:44:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-20 06:44:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-20 06:44:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-11-20 06:44:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-20 06:44:09,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-11-20 06:44:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:09,132 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-20 06:44:09,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2021-11-20 06:44:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-20 06:44:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:44:09,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:09,133 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:09,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:09,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:09,343 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1676390378, now seen corresponding path program 3 times [2021-11-20 06:44:09,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:09,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634002727] [2021-11-20 06:44:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:09,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:09,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:44:09,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540774421] [2021-11-20 06:44:09,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:44:09,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:44:09,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:44:09,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:44:09,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53675f5f-d5ae-4da7-9d6c-6769f8ba502a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:44:09,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:44:09,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:09,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 06:44:09,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:37,702 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:46:07,001 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main_~y~0#1|) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (and (<= |c_ULTIMATE.start_main_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_18|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_17| Int)) (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_17|) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_17| |c_ULTIMATE.start_main_~y~0#1|) 256))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse0) 256)) (not (= .cse0 0)) (= (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (<= .cse0 127)) (let ((.cse1 (+ .cse0 (- 256)))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse1) 256)) (< 127 .cse0) (= 0 (mod (mod .cse1 |c_ULTIMATE.start_gcd_test_~a#1|) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_17| Int)) (let ((.cse2 (mod |v_ULTIMATE.start_gcd_test_~a#1_17| |c_ULTIMATE.start_main_~y~0#1|))) (and (not (= .cse2 0)) (let ((.cse4 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| 255) .cse2) 256))) (or (let ((.cse3 (+ (- 256) .cse4))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse3) 256)) (< 127 .cse4) (= (mod .cse3 |c_ULTIMATE.start_gcd_test_~a#1|) 0))) (and (= (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse4) 256)) (not (= .cse4 0)) (<= .cse4 127)))) (< |v_ULTIMATE.start_gcd_test_~a#1_17| 0))))))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-20 06:47:04,490 WARN L227 SmtUtils]: Spent 13.32s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:47:41,488 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int)) (and (<= |c_ULTIMATE.start_main_~y~0#1| |v_ULTIMATE.start_gcd_test_~a#1_18|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_17| Int)) (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_17|) (let ((.cse0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_17| |c_ULTIMATE.start_main_~y~0#1|) 256))) (or (and (= (mod (mod .cse0 |c_ULTIMATE.start_main_~g~0#1|) 256) 0) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse0) 256) |c_ULTIMATE.start_main_~g~0#1|) (not (= .cse0 0)) (<= .cse0 127)) (let ((.cse1 (+ .cse0 (- 256)))) (and (= 0 (mod (mod .cse1 |c_ULTIMATE.start_main_~g~0#1|) 256)) (< 127 .cse0) (= |c_ULTIMATE.start_main_~g~0#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse1) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_17| Int)) (let ((.cse2 (mod |v_ULTIMATE.start_gcd_test_~a#1_17| |c_ULTIMATE.start_main_~y~0#1|))) (and (not (= .cse2 0)) (let ((.cse3 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| 255) .cse2) 256))) (or (and (= |c_ULTIMATE.start_main_~g~0#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse3) 256)) (= (mod (mod .cse3 |c_ULTIMATE.start_main_~g~0#1|) 256) 0) (not (= .cse3 0)) (<= .cse3 127)) (let ((.cse4 (+ (- 256) .cse3))) (and (< 127 .cse3) (= (mod .cse4 |c_ULTIMATE.start_main_~g~0#1|) 0) (= |c_ULTIMATE.start_main_~g~0#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse4) 256)))))) (< |v_ULTIMATE.start_gcd_test_~a#1_17| 0))))))) (<= 0 |c_ULTIMATE.start_main_~y~0#1|) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (<= |c_ULTIMATE.start_main_~g~0#1| 127) (not (= |c_ULTIMATE.start_main_~g~0#1| 0))) is different from false [2021-11-20 06:47:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:47:52,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:23,142 WARN L838 $PredicateComparison]: unable to prove that (or (= |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 ((.cse20 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256)) (.cse19 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256))) (let ((.cse10 (<= .cse19 127)) (.cse9 (< 127 .cse19)) (.cse4 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse20) 256) 0))) (.cse6 (<= .cse20 |c_ULTIMATE.start_main_~y~0#1|)) (.cse7 (< 127 .cse20)) (.cse8 (<= .cse20 127)) (.cse2 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse0 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse19) 256) 0))) (.cse1 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse3 (<= .cse19 |c_ULTIMATE.start_main_~y~0#1|)) (.cse5 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse11 (mod .cse18 256))) (and (or (and (or (and (or (and (or .cse0 .cse1 .cse2 .cse3) (or .cse1 .cse4 .cse5 .cse6)) .cse7) (or .cse0 .cse1 .cse2 .cse8 .cse3)) .cse9) (or .cse1 .cse4 .cse5 .cse10 .cse6 .cse7)) (<= .cse11 127)) (or (let ((.cse13 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse14 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse11) 256) 0))) (.cse15 (<= .cse11 |c_ULTIMATE.start_main_~y~0#1|))) (let ((.cse12 (or .cse5 .cse13 .cse14 .cse15)) (.cse17 (or .cse13 .cse14 .cse15)) (.cse16 (= .cse18 0))) (and (or .cse10 (and .cse12 (or .cse2 .cse13 .cse14 .cse15) (or (and (or .cse1 .cse4 .cse5 .cse6 .cse16) .cse17) .cse7))) (or .cse9 (and (or (and (or (and (or .cse1 .cse4 .cse6) .cse17) .cse5) (or (and .cse17 (or .cse0 .cse1 .cse3)) .cse2)) .cse7) (or .cse8 (and .cse12 (or .cse2 (and .cse17 (or .cse0 .cse1 .cse3 .cse16)))))))))) (< 127 .cse11)))))) (<= |c_ULTIMATE.start_main_~y~0#1| 0)) is different from false