./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y --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 6398dd839d77433d1687aba555077cd298c276d20f879ef7dc3c0a3d5c207e2a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:00:58,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:00:58,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:00:58,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:00:58,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:00:58,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:00:58,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:00:58,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:00:58,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:00:58,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:00:58,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:00:58,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:00:58,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:00:58,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:00:58,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:00:58,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:00:58,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:00:58,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:00:58,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:00:58,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:00:58,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:00:58,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:00:58,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:00:58,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:00:58,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:00:59,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:00:59,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:00:59,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:00:59,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:00:59,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:00:59,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:00:59,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:00:59,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:00:59,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:00:59,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:00:59,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:00:59,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:00:59,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:00:59,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:00:59,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:00:59,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:00:59,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:00:59,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:00:59,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:00:59,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:00:59,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:00:59,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:00:59,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:00:59,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:00:59,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:00:59,063 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:00:59,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:00:59,065 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:00:59,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:00:59,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:00:59,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:00:59,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:00:59,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:00:59,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:00:59,066 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:00:59,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:00:59,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:00:59,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:00:59,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:00:59,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:00:59,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:00:59,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:00:59,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:00:59,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:00:59,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:00:59,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:00:59,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:00:59,069 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:00:59,070 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:00:59,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:00:59,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:00:59,070 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_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6398dd839d77433d1687aba555077cd298c276d20f879ef7dc3c0a3d5c207e2a [2021-11-13 18:00:59,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:00:59,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:00:59,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:00:59,351 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:00:59,352 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:00:59,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/gcd_3+newton_3_8.i [2021-11-13 18:00:59,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/data/ee5a7b3da/d8d0f1f0e67b40d5afd257e6a5181573/FLAGe34c5a9bd [2021-11-13 18:00:59,888 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:00:59,889 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i [2021-11-13 18:00:59,897 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/data/ee5a7b3da/d8d0f1f0e67b40d5afd257e6a5181573/FLAGe34c5a9bd [2021-11-13 18:01:00,287 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/data/ee5a7b3da/d8d0f1f0e67b40d5afd257e6a5181573 [2021-11-13 18:01:00,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:01:00,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:01:00,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:01:00,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:01:00,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:01:00,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@129e074e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00, skipping insertion in model container [2021-11-13 18:01:00,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:01:00,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:01:00,530 WARN L228 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_90644379-d9f9-4697-8bc6-df701eb136ab/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i[1226,1239] [2021-11-13 18:01:00,561 WARN L228 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_90644379-d9f9-4697-8bc6-df701eb136ab/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i[2862,2875] [2021-11-13 18:01:00,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:01:00,572 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:01:00,585 WARN L228 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_90644379-d9f9-4697-8bc6-df701eb136ab/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i[1226,1239] [2021-11-13 18:01:00,602 WARN L228 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_90644379-d9f9-4697-8bc6-df701eb136ab/sv-benchmarks/c/combinations/gcd_3+newton_3_8.i[2862,2875] [2021-11-13 18:01:00,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:01:00,620 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:01:00,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00 WrapperNode [2021-11-13 18:01:00,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:01:00,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:01:00,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:01:00,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:01:00,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:01:00,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:01:00,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:01:00,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:01:00,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:01:00,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:01:00,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:01:00,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:01:00,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (1/1) ... [2021-11-13 18:01:00,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:01:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:00,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:01:00,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:01:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-13 18:01:00,868 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-13 18:01:00,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:01:00,869 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-13 18:01:00,870 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-13 18:01:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:01:00,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:01:00,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:01:01,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:01:01,240 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:01:01,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:01:01 BoogieIcfgContainer [2021-11-13 18:01:01,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:01:01,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:01:01,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:01:01,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:01:01,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:01:00" (1/3) ... [2021-11-13 18:01:01,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741c26eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:01:01, skipping insertion in model container [2021-11-13 18:01:01,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:01:00" (2/3) ... [2021-11-13 18:01:01,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741c26eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:01:01, skipping insertion in model container [2021-11-13 18:01:01,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:01:01" (3/3) ... [2021-11-13 18:01:01,254 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_8.i [2021-11-13 18:01:01,260 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:01:01,260 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:01:01,311 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:01:01,319 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 [2021-11-13 18:01:01,320 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:01:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:01:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:01:01,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:01,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:01,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-11-13 18:01:01,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:01,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239399643] [2021-11-13 18:01:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:01,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:01,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:01,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239399643] [2021-11-13 18:01:01,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239399643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:01,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:01,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:01:01,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786448953] [2021-11-13 18:01:01,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:01,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:01:01,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:01,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:01:01,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:01:01,647 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:01,713 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2021-11-13 18:01:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:01:01,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:01:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:01,724 INFO L225 Difference]: With dead ends: 96 [2021-11-13 18:01:01,725 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 18:01:01,728 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 [2021-11-13 18:01:01,733 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:01,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 19 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 25.77ms Time] [2021-11-13 18:01:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 18:01:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-11-13 18:01:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:01:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-13 18:01:01,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2021-11-13 18:01:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:01,778 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-13 18:01:01,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-13 18:01:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:01:01,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:01,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:01,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:01:01,782 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-11-13 18:01:01,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:01,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240386555] [2021-11-13 18:01:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:01,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:01,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:01,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240386555] [2021-11-13 18:01:01,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240386555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:01,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:01,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:01:01,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308266513] [2021-11-13 18:01:01,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:01,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:01:01,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:01:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:01:01,890 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:01,953 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-13 18:01:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:01:01,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:01:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:01,955 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:01:01,955 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 18:01:01,956 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 [2021-11-13 18:01:01,958 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:01,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 26 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 23.38ms Time] [2021-11-13 18:01:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 18:01:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-13 18:01:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:01:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-13 18:01:01,967 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-11-13 18:01:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:01,967 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-13 18:01:01,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:01:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-13 18:01:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:01:01,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:01,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:01,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:01:01,970 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-11-13 18:01:01,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:01,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578758814] [2021-11-13 18:01:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:01,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:01,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:01:01,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924141888] [2021-11-13 18:01:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:01,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:01,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:01,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:02,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:01:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:02,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:01:02,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:02,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:30,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:30,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578758814] [2021-11-13 18:01:30,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:01:30,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924141888] [2021-11-13 18:01:30,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924141888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:30,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:30,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-13 18:01:30,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195888455] [2021-11-13 18:01:30,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:30,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:01:30,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:30,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:01:30,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=157, Unknown=10, NotChecked=0, Total=210 [2021-11-13 18:01:30,741 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2021-11-13 18:01:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:33,776 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-13 18:01:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:01:33,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 [2021-11-13 18:01:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:33,779 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:01:33,779 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 18:01:33,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=84, Invalid=247, Unknown=11, NotChecked=0, Total=342 [2021-11-13 18:01:33,782 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 225.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 246.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:33,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 301 Invalid, 71 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 8 Unchecked, 246.76ms Time] [2021-11-13 18:01:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 18:01:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-13 18:01:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:01:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-13 18:01:33,792 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-11-13 18:01:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:33,792 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-13 18:01:33,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2021-11-13 18:01:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-13 18:01:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:01:33,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:33,794 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:33,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:01:34,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-13 18:01:34,007 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-11-13 18:01:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:34,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113093801] [2021-11-13 18:01:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:34,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:34,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:01:34,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610929574] [2021-11-13 18:01:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:34,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:34,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:34,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:34,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:01:34,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:01:34,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:01:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:52,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:15,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:15,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113093801] [2021-11-13 18:02:15,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:02:15,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610929574] [2021-11-13 18:02:15,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610929574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:15,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:02:15,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-13 18:02:15,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440675241] [2021-11-13 18:02:15,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:15,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:02:15,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:02:15,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=209, Unknown=6, NotChecked=0, Total=272 [2021-11-13 18:02:15,990 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:19,099 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-13 18:02:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:02:19,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 18:02:19,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:19,101 INFO L225 Difference]: With dead ends: 46 [2021-11-13 18:02:19,101 INFO L226 Difference]: Without dead ends: 37 [2021-11-13 18:02:19,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=68, Invalid=267, Unknown=7, NotChecked=0, Total=342 [2021-11-13 18:02:19,104 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 84.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:19,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 32 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 10 Unchecked, 84.00ms Time] [2021-11-13 18:02:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-13 18:02:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-13 18:02:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:02:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-13 18:02:19,113 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2021-11-13 18:02:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:19,114 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-13 18:02:19,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-13 18:02:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:02:19,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:19,116 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:19,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 18:02:19,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:19,317 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash 571830174, now seen corresponding path program 3 times [2021-11-13 18:02:19,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:19,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63277523] [2021-11-13 18:02:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:19,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:19,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:02:19,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615065023] [2021-11-13 18:02:19,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:02:19,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:19,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:19,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:19,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90644379-d9f9-4697-8bc6-df701eb136ab/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:02:19,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:02:19,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:02:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 18:02:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:30,234 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int) (|v_ULTIMATE.start_gcd_test_~b#1_19| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_19| 255) 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_18| .cse0) (<= .cse0 127) (let ((.cse5 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_18|) 256))) (or (and (<= .cse1 127) (let ((.cse7 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse1))) (or (let ((.cse6 (+ (mod (+ (* .cse1 255) .cse7) 256) (- 256)))) (let ((.cse4 (mod (mod .cse1 .cse6) 256))) (and (let ((.cse2 (mod .cse6 .cse4))) (let ((.cse3 (= .cse2 0))) (or (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse2 256)) .cse3) (and (= (mod (+ .cse2 (* .cse4 255)) 256) .cse5) (not .cse3))))) (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (not (= .cse4 0))))) (let ((.cse8 (mod .cse7 256))) (let ((.cse9 (mod (mod .cse1 .cse8) 256))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse8 .cse9) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_18|) (not (= .cse8 0)) (not (= .cse9 0)))))))) (let ((.cse16 (+ (- 256) .cse1))) (let ((.cse15 (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse16) .cse1) 256))) (let ((.cse14 (+ .cse15 (- 256)))) (let ((.cse10 (mod .cse16 .cse14))) (and (not (= 0 .cse10)) (let ((.cse13 (mod (+ .cse15 .cse10) 256))) (let ((.cse12 (mod .cse14 (+ (- 256) .cse13)))) (let ((.cse11 (= .cse12 0))) (or (and (not .cse11) (= (mod (+ .cse12 .cse13) 256) .cse5)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse12 256)) .cse11))))) (< 127 .cse1))))))))))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) is different from false [2021-11-13 18:08:48,966 WARN L838 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse0 (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| 0) (let ((.cse9 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse11 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse10 (mod (+ (* |c_ULTIMATE.start_gcd_test_~a#1| 255) .cse0) 256))) (let ((.cse2 (<= .cse10 127)) (.cse4 (and .cse11 (= |c_ULTIMATE.start_gcd_test_~b#1| .cse10))) (.cse5 (and .cse11 (= .cse10 .cse9))) (.cse6 (< 127 .cse10)) (.cse1 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse0) 256)) (.cse7 (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (or (and (<= .cse1 127) (let ((.cse3 (and (= |c_ULTIMATE.start_gcd_test_~b#1| .cse1) .cse7))) (or (and .cse2 (or .cse3 .cse4)) (and (or .cse5 .cse3) .cse6)))) (and (< 127 .cse1) (let ((.cse8 (and (= .cse1 .cse9) .cse7))) (or (and .cse2 (or .cse8 .cse4)) (and (or .cse8 .cse5) .cse6)))))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse13 (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (let ((.cse12 (mod .cse13 256))) (or (and (<= .cse12 127) (= |c_ULTIMATE.start_gcd_test_~b#1| .cse12)) (and (= .cse12 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (< 127 .cse12)))) (or (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_21|) (= .cse13 0)))))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int) (|v_ULTIMATE.start_gcd_test_~b#1_19| Int)) (let ((.cse27 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_19| 255) 256))) (and (let ((.cse16 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse14 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_18|) 256))) (or (and (<= .cse14 127) (let ((.cse19 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse14))) (or (let ((.cse18 (+ (mod (+ (* .cse14 255) .cse19) 256) (- 256)))) (let ((.cse17 (mod (mod .cse14 .cse18) 256))) (let ((.cse15 (mod .cse18 .cse17))) (and (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (not (= .cse15 0)) (= .cse16 (mod (+ .cse15 (* .cse17 255)) 256)) (not (= .cse17 0)))))) (let ((.cse20 (mod .cse19 256))) (let ((.cse21 (mod (mod .cse14 .cse20) 256))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse20 .cse21) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_18|) (not (= .cse21 0)))))))) (let ((.cse26 (+ (- 256) .cse14))) (let ((.cse25 (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse26) .cse14) 256))) (let ((.cse24 (+ .cse25 (- 256)))) (let ((.cse23 (mod (+ .cse25 (mod .cse26 .cse24)) 256))) (let ((.cse22 (mod .cse24 (+ (- 256) .cse23)))) (and (not (= .cse22 0)) (= .cse16 (mod (+ .cse22 .cse23) 256)) (< 127 .cse14))))))))) (<= |v_ULTIMATE.start_gcd_test_~a#1_18| .cse27) (<= .cse27 127))))) is different from false [2021-11-13 18:10:37,185 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse0 (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| 0) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (= (mod (+ (* |c_ULTIMATE.start_gcd_test_~a#1| 255) .cse0) 256) 0)) (and (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse0) 256) 0) (< |c_ULTIMATE.start_gcd_test_~a#1| 0)))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse1 (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_21|) (= .cse1 0)) (= (mod .cse1 256) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int) (|v_ULTIMATE.start_gcd_test_~b#1_19| Int)) (let ((.cse15 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_19| 255) 256))) (and (let ((.cse4 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_18|) 256))) (or (and (<= .cse2 127) (let ((.cse7 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse2))) (or (let ((.cse6 (+ (mod (+ (* .cse2 255) .cse7) 256) (- 256)))) (let ((.cse5 (mod (mod .cse2 .cse6) 256))) (let ((.cse3 (mod .cse6 .cse5))) (and (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (not (= .cse3 0)) (= .cse4 (mod (+ .cse3 (* .cse5 255)) 256)) (not (= .cse5 0)))))) (let ((.cse8 (mod .cse7 256))) (let ((.cse9 (mod (mod .cse2 .cse8) 256))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse8 .cse9) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_18|) (not (= .cse9 0)))))))) (let ((.cse14 (+ (- 256) .cse2))) (let ((.cse13 (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse14) .cse2) 256))) (let ((.cse12 (+ .cse13 (- 256)))) (let ((.cse11 (mod (+ .cse13 (mod .cse14 .cse12)) 256))) (let ((.cse10 (mod .cse12 (+ (- 256) .cse11)))) (and (not (= .cse10 0)) (= .cse4 (mod (+ .cse10 .cse11) 256)) (< 127 .cse2))))))))) (<= |v_ULTIMATE.start_gcd_test_~a#1_18| .cse15) (<= .cse15 127))))) is different from false [2021-11-13 18:12:34,569 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse0 (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_#res#1|))) (and (= (mod .cse0 256) 0) (or (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_21|) (= .cse0 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse1 (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_#res#1|))) (and (or (and (= (mod (+ .cse1 (* |c_ULTIMATE.start_gcd_test_#res#1| 255)) 256) 0) (<= 0 |c_ULTIMATE.start_gcd_test_#res#1|)) (and (= (mod (+ .cse1 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (< |c_ULTIMATE.start_gcd_test_#res#1| 0))) (< |v_ULTIMATE.start_gcd_test_~a#1_21| 0) (not (= .cse1 0)))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int) (|v_ULTIMATE.start_gcd_test_~b#1_19| Int)) (let ((.cse2 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_19| 255) 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_18| .cse2) (<= .cse2 127) (let ((.cse4 (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|)) (.cse3 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_18|) 256))) (or (and (<= .cse3 127) (let ((.cse8 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse3))) (or (let ((.cse7 (+ (mod (+ (* .cse3 255) .cse8) 256) (- 256)))) (let ((.cse6 (mod (mod .cse3 .cse7) 256))) (let ((.cse5 (mod .cse7 .cse6))) (and (= .cse4 (mod (+ .cse5 (* .cse6 255)) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (not (= .cse5 0)) (not (= .cse6 0)))))) (let ((.cse9 (mod .cse8 256))) (let ((.cse10 (mod (mod .cse3 .cse9) 256))) (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_18|) (= |c_ULTIMATE.start_gcd_test_#res#1| (mod (mod .cse9 .cse10) 256)) (not (= .cse10 0)))))))) (let ((.cse15 (+ (- 256) .cse3))) (let ((.cse14 (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse15) .cse3) 256))) (let ((.cse13 (+ .cse14 (- 256)))) (let ((.cse12 (mod (+ .cse14 (mod .cse15 .cse13)) 256))) (let ((.cse11 (mod .cse13 (+ (- 256) .cse12)))) (and (not (= .cse11 0)) (< 127 .cse3) (= .cse4 (mod (+ .cse11 .cse12) 256))))))))))))) (not (= |c_ULTIMATE.start_gcd_test_#res#1| 0))) is different from false [2021-11-13 18:14:22,958 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_18| Int) (|v_ULTIMATE.start_gcd_test_~b#1_19| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_19| 255) 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_18| .cse0) (<= .cse0 127) (let ((.cse3 (+ 256 |c_ULTIMATE.start_main1_~g~0#1|)) (.cse4 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_18|) 256))) (or (let ((.cse7 (+ (- 256) .cse4))) (let ((.cse6 (mod (+ (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse7) .cse4) 256))) (let ((.cse5 (+ .cse6 (- 256)))) (let ((.cse2 (mod (+ .cse6 (mod .cse7 .cse5)) 256))) (let ((.cse1 (mod .cse5 (+ (- 256) .cse2)))) (and (= (mod (+ .cse1 .cse2) 256) .cse3) (not (= .cse1 0)) (< 127 .cse4))))))) (and (<= .cse4 127) (let ((.cse11 (mod |v_ULTIMATE.start_gcd_test_~a#1_18| .cse4))) (or (let ((.cse10 (+ (mod (+ (* .cse4 255) .cse11) 256) (- 256)))) (let ((.cse9 (mod (mod .cse4 .cse10) 256))) (let ((.cse8 (mod .cse10 .cse9))) (and (< |v_ULTIMATE.start_gcd_test_~a#1_18| 0) (not (= .cse8 0)) (= (mod (+ .cse8 (* .cse9 255)) 256) .cse3) (not (= .cse9 0)))))) (let ((.cse12 (mod .cse11 256))) (let ((.cse13 (mod (mod .cse4 .cse12) 256))) (and (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_18|) (= |c_ULTIMATE.start_main1_~g~0#1| (mod (mod .cse12 .cse13) 256)) (not (= .cse13 0))))))))))))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_main1_~g~0#1| 0)) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse14 (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_main1_~g~0#1|))) (and (or (= .cse14 0) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_21|)) (= (mod .cse14 256) 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (let ((.cse15 (mod |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_main1_~g~0#1|))) (and (= (mod (+ |c_ULTIMATE.start_main1_~g~0#1| .cse15) 256) 0) (not (= .cse15 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| 0))))) (<= |c_ULTIMATE.start_main1_~g~0#1| 127)) is different from false