./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_2.i --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_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/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_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/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_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/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 a4130d48586bacb8e01e8525ec6ffcd9f272030d26882b368d1c87de47eeb037 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:42:46,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:42:46,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:42:46,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:42:46,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:42:46,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:42:46,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:42:46,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:42:46,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:42:46,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:42:46,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:42:46,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:42:46,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:42:46,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:42:46,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:42:46,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:42:46,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:42:46,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:42:46,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:42:46,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:42:46,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:42:46,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:42:46,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:42:46,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:42:46,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:42:46,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:42:46,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:42:46,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:42:46,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:42:46,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:42:46,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:42:46,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:42:46,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:42:46,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:42:46,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:42:46,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:42:46,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:42:46,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:42:46,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:42:46,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:42:46,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:42:46,789 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:42:46,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:42:46,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:42:46,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:42:46,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:42:46,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:42:46,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:42:46,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:42:46,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:42:46,878 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:42:46,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:42:46,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:42:46,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:42:46,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:42:46,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:42:46,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:42:46,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:42:46,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:42:46,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:42:46,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:42:46,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:42:46,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:42:46,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:42:46,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:42:46,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:42:46,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:42:46,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:42:46,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:42:46,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:42:46,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:42:46,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:42:46,884 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:42:46,885 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:42:46,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:42:46,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:42:46,886 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_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4130d48586bacb8e01e8525ec6ffcd9f272030d26882b368d1c87de47eeb037 [2021-11-20 07:42:47,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:42:47,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:42:47,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:42:47,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:42:47,296 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:42:47,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/gcd_3+newton_2_2.i [2021-11-20 07:42:47,379 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/data/80ddc1c96/e477930e3c39461db88412359672f015/FLAG50074c431 [2021-11-20 07:42:47,987 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:42:47,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i [2021-11-20 07:42:47,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/data/80ddc1c96/e477930e3c39461db88412359672f015/FLAG50074c431 [2021-11-20 07:42:48,299 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/data/80ddc1c96/e477930e3c39461db88412359672f015 [2021-11-20 07:42:48,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:42:48,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:42:48,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:42:48,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:42:48,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:42:48,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f90978b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48, skipping insertion in model container [2021-11-20 07:42:48,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:42:48,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:42:48,591 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_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[1226,1239] [2021-11-20 07:42:48,627 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_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[2841,2854] [2021-11-20 07:42:48,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:42:48,640 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:42:48,656 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_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[1226,1239] [2021-11-20 07:42:48,672 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_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[2841,2854] [2021-11-20 07:42:48,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:42:48,696 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:42:48,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48 WrapperNode [2021-11-20 07:42:48,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:42:48,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:42:48,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:42:48,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:42:48,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,783 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-11-20 07:42:48,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:42:48,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:42:48,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:42:48,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:42:48,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:42:48,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:42:48,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:42:48,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:42:48,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (1/1) ... [2021-11-20 07:42:48,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:42:48,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:48,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:42:48,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:42:48,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:42:48,960 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-20 07:42:48,961 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-20 07:42:48,961 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-20 07:42:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-20 07:42:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:42:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:42:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:42:49,067 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:42:49,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:42:49,286 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:42:49,294 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:42:49,295 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:42:49,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:42:49 BoogieIcfgContainer [2021-11-20 07:42:49,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:42:49,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:42:49,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:42:49,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:42:49,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:42:48" (1/3) ... [2021-11-20 07:42:49,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bebcee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:42:49, skipping insertion in model container [2021-11-20 07:42:49,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:48" (2/3) ... [2021-11-20 07:42:49,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bebcee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:42:49, skipping insertion in model container [2021-11-20 07:42:49,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:42:49" (3/3) ... [2021-11-20 07:42:49,309 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_2.i [2021-11-20 07:42:49,316 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:42:49,316 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 07:42:49,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:42:49,387 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 07:42:49,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 07:42:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:42:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:42:49,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:49,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:49,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:49,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-11-20 07:42:49,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:49,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303116652] [2021-11-20 07:42:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:49,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:49,706 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 07:42:49,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:49,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303116652] [2021-11-20 07:42:49,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303116652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:42:49,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:42:49,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:42:49,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886095393] [2021-11-20 07:42:49,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:49,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:42:49,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:42:49,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:42:49,759 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:49,833 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-11-20 07:42:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:42:49,836 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 [2021-11-20 07:42:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:49,845 INFO L225 Difference]: With dead ends: 90 [2021-11-20 07:42:49,846 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 07:42:49,850 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 07:42:49,854 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:49,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:42:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 07:42:49,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-11-20 07:42:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:42:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-20 07:42:49,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-11-20 07:42:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:49,903 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-20 07:42:49,903 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) [2021-11-20 07:42:49,904 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-20 07:42:49,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:42:49,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:49,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:49,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:42:49,907 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:49,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-11-20 07:42:49,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:49,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134255345] [2021-11-20 07:42:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:49,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:50,005 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 07:42:50,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:50,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134255345] [2021-11-20 07:42:50,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134255345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:42:50,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:42:50,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:42:50,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255244371] [2021-11-20 07:42:50,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:50,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:42:50,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:50,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:42:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:42:50,010 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:50,139 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-20 07:42:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:42:50,140 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 [2021-11-20 07:42:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:50,142 INFO L225 Difference]: With dead ends: 36 [2021-11-20 07:42:50,142 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 07:42:50,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:42:50,145 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:50,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:42:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 07:42:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-20 07:42:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:42:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-20 07:42:50,156 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-11-20 07:42:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:50,156 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-20 07:42:50,157 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) [2021-11-20 07:42:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-20 07:42:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:42:50,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:50,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:50,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:42:50,159 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:50,161 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-11-20 07:42:50,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:50,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422179754] [2021-11-20 07:42:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:50,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:50,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:42:50,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112365145] [2021-11-20 07:42:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:50,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:50,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:50,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:50,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:42:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:42:50,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:23,271 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 07:43:23,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:29,486 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 07:43:29,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:43:29,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422179754] [2021-11-20 07:43:29,487 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:43:29,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112365145] [2021-11-20 07:43:29,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112365145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:29,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:29,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-20 07:43:29,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223277711] [2021-11-20 07:43:29,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:29,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:43:29,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:43:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:43:29,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=207, Unknown=11, NotChecked=0, Total=272 [2021-11-20 07:43:29,492 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:32,446 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-20 07:43:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:43:32,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 07:43:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:32,449 INFO L225 Difference]: With dead ends: 42 [2021-11-20 07:43:32,449 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 07:43:32,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=74, Invalid=256, Unknown=12, NotChecked=0, Total=342 [2021-11-20 07:43:32,452 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:32,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-20 07:43:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 07:43:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-11-20 07:43:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:43:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-20 07:43:32,461 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-11-20 07:43:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:32,461 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-20 07:43:32,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:43:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-20 07:43:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:43:32,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:32,463 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:32,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:32,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:43:32,680 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:43:32,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:32,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-11-20 07:43:32,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:43:32,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179644632] [2021-11-20 07:43:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:32,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:43:32,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:43:32,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088577024] [2021-11-20 07:43:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:43:32,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:43:32,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:43:32,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:43:32,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:43:32,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:43:32,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:43:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:43:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:35,562 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 07:43:35,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:08,281 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 07:44:08,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:44:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179644632] [2021-11-20 07:44:08,282 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:44:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088577024] [2021-11-20 07:44:08,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088577024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:44:08,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:44:08,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-11-20 07:44:08,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979098707] [2021-11-20 07:44:08,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:44:08,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:44:08,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:44:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:44:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=182, Unknown=9, NotChecked=0, Total=240 [2021-11-20 07:44:08,287 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:44:08,460 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-20 07:44:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:44:08,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 07:44:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:44:08,464 INFO L225 Difference]: With dead ends: 43 [2021-11-20 07:44:08,464 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 07:44:08,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=49, Invalid=182, Unknown=9, NotChecked=0, Total=240 [2021-11-20 07:44:08,467 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:44:08,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-11-20 07:44:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 07:44:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-20 07:44:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:44:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-20 07:44:08,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-11-20 07:44:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:44:08,476 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-20 07:44:08,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:44:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-20 07:44:08,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:44:08,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:44:08,478 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:44:08,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 07:44:08,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:44:08,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:44:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:44:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-11-20 07:44:08,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:44:08,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118056111] [2021-11-20 07:44:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:44:08,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:44:08,702 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:44:08,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311231030] [2021-11-20 07:44:08,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:44:08,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:44:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:44:08,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:44:08,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:44:08,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:44:08,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:44:08,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 07:44:08,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:44:27,248 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:44:57,729 WARN L860 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse4) 256))) (let ((.cse3 (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse2 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse3 256)) (= (mod (mod .cse4 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse4 127) (= .cse3 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse9 (+ .cse5 (- 256)))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (let ((.cse6 (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (mod .cse9 .cse8))) (and (< 127 .cse5) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse6 256)) (not (= .cse7 0)) (not (= .cse8 0)) (= .cse6 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse8 255) .cse7) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse10 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse13 (+ .cse10 (- 256)))) (let ((.cse11 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse12 (mod .cse13 .cse11))) (and (< 127 .cse10) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse11 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse12 0)) (not (= .cse11 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse11 255) .cse12) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from true [2021-11-20 07:45:01,935 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127) (= (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse3 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (and (not (= .cse2 0)) (= (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (mod (mod .cse3 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse3 127))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse5 (mod .cse7 .cse6))) (and (< 127 .cse4) (not (= .cse5 0)) (not (= .cse6 0)) (= (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse6 255) .cse5) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse8 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse11 (+ .cse8 (- 256)))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (let ((.cse9 (mod .cse11 .cse10))) (and (< 127 .cse8) (not (= .cse9 0)) (not (= .cse10 0)) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse10 255) .cse9) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-20 07:45:06,883 WARN L860 $PredicateComparison]: unable to prove that (and (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (+ .cse0 (- 256)))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (let ((.cse1 (mod .cse3 .cse2))) (and (< 127 .cse0) (not (= .cse1 0)) (= (mod .cse2 |c_ULTIMATE.start_gcd_test_#res#1|) 0) (not (= .cse2 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse2 255) .cse1) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse5 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse6 (mod .cse7 .cse5))) (and (< 127 .cse4) (= (mod (mod .cse5 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= .cse6 0)) (not (= .cse5 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse5 255) .cse6) 256))))))))) (< |c_ULTIMATE.start_gcd_test_#res#1| 0)) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (and (not (= .cse8 0)) (= (mod (mod .cse9 .cse8) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (<= .cse9 127) (= (mod .cse8 |c_ULTIMATE.start_gcd_test_#res#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse11 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (and (not (= .cse10 0)) (= (mod (mod .cse11 .cse10) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= .cse11 127)))))) (<= 0 |c_ULTIMATE.start_gcd_test_#res#1|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_gcd_test_#res#1| 0))) is different from true [2021-11-20 07:45:11,088 WARN L838 $PredicateComparison]: unable to prove that (and (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (+ .cse0 (- 256)))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (let ((.cse2 (mod .cse3 .cse1))) (and (< 127 .cse0) (= (+ 256 |c_ULTIMATE.start_main1_~g~0#1|) (mod (+ (* .cse1 255) .cse2) 256)) (not (= .cse2 0)) (not (= .cse1 0)) (= (mod .cse1 |c_ULTIMATE.start_main1_~g~0#1|) 0))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse5 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse6 (mod .cse7 .cse5))) (and (< 127 .cse4) (= (+ 256 |c_ULTIMATE.start_main1_~g~0#1|) (mod (+ (* .cse5 255) .cse6) 256)) (not (= .cse6 0)) (= (mod (mod .cse5 |c_ULTIMATE.start_main1_~g~0#1|) 256) 0) (not (= .cse5 0))))))))) (< |c_ULTIMATE.start_main1_~g~0#1| 0)) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (and (not (= .cse8 0)) (= (mod .cse8 |c_ULTIMATE.start_main1_~g~0#1|) 0) (= (mod (mod .cse9 .cse8) 256) |c_ULTIMATE.start_main1_~g~0#1|) (<= .cse9 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse11 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (and (not (= .cse10 0)) (= (mod (mod .cse11 .cse10) 256) |c_ULTIMATE.start_main1_~g~0#1|) (= (mod (mod .cse10 |c_ULTIMATE.start_main1_~g~0#1|) 256) 0) (<= .cse11 127)))))) (<= 0 |c_ULTIMATE.start_main1_~g~0#1|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_main1_~g~0#1| 0)) (<= |c_ULTIMATE.start_main1_~g~0#1| 127)) is different from false [2021-11-20 07:45:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-20 07:45:35,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:01,845 WARN L227 SmtUtils]: Spent 1.16m on a formula simplification. DAG size of input: 80 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:49:06,763 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse18 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256))) (let ((.cse27 (+ (- 256) .cse24))) (let ((.cse25 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256)) (.cse26 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256))) (let ((.cse3 (not (= (mod (mod .cse27 .cse26) 256) 0))) (.cse5 (<= .cse26 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse13 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (= .cse24 0)) (.cse10 (not (= (mod (mod .cse24 .cse25) 256) 0))) (.cse11 (<= .cse25 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse12 (or .cse4 .cse9 .cse10 .cse11)) (.cse14 (< 127 .cse24)) (.cse8 (<= .cse13 127)) (.cse1 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse7 (or .cse3 .cse4 .cse5)) (.cse0 (<= .cse24 127)) (.cse17 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse16 (mod .cse18 256))) (and (or (let ((.cse6 (= .cse18 0)) (.cse2 (let ((.cse15 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256))) (or (<= .cse15 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse15) 256) 0)) .cse17 (= 0 .cse16))))) (and (or .cse0 (and (or .cse1 (and .cse2 (or .cse3 .cse4 .cse5 .cse6))) (or (and .cse7 .cse2) .cse1 .cse8))) (or (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse6) .cse2) .cse1) (or .cse1 (and .cse12 .cse2) (< 127 .cse13))) .cse14))) (< 127 .cse16)) (or (<= .cse16 127) (let ((.cse20 (let ((.cse22 (+ (- 256) .cse16))) (let ((.cse23 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256))) (or (not (= (mod (mod .cse22 .cse23) 256) 0)) .cse17 (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (let ((.cse19 (and .cse12 .cse20))) (and (or .cse1 .cse8 .cse19) (or .cse1 .cse19))) .cse14) (or (let ((.cse21 (and .cse7 .cse20))) (and (or .cse21 .cse1 .cse8) (or .cse21 .cse1))) .cse0)))))))))))) is different from true [2021-11-20 07:49:55,023 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (forall ((|ULTIMATE.start_gcd_test_~b#1| Int)) (let ((.cse2 (mod (* |ULTIMATE.start_gcd_test_~b#1| 255) 256))) (or (let ((.cse3 (mod |c_ULTIMATE.start_gcd_test_~a#1| .cse2))) (and (let ((.cse0 (mod .cse3 256))) (let ((.cse1 (mod (mod .cse2 .cse0) 256))) (or (not (= (mod (mod .cse0 .cse1) 256) 0)) (<= .cse1 |c_ULTIMATE.start_main1_~x~0#1|) (< |c_ULTIMATE.start_gcd_test_~a#1| 0) (= .cse0 0)))) (let ((.cse5 (+ (- 256) (mod (+ .cse3 (* .cse2 255)) 256)))) (let ((.cse4 (mod (mod .cse2 .cse5) 256))) (or (<= .cse4 |c_ULTIMATE.start_main1_~x~0#1|) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= (mod (mod .cse5 .cse4) 256) 0))))))) (< 127 .cse2))))) is different from true [2021-11-20 07:50:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-20 07:50:00,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:50:00,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118056111] [2021-11-20 07:50:00,151 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:50:00,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311231030] [2021-11-20 07:50:00,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311231030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:50:00,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:50:00,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-20 07:50:00,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896067717] [2021-11-20 07:50:00,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:50:00,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:50:00,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:50:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:50:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=159, Unknown=9, NotChecked=186, Total=420 [2021-11-20 07:50:00,156 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:50:02,679 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) (and .cse0 (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| .cse1) (<= .cse1 127)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse2 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (and (< 127 .cse2) (= .cse2 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)))))) (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse20 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse20) 256))) (let ((.cse29 (+ (- 256) .cse26))) (let ((.cse27 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse26) 256)) (.cse28 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256))) (let ((.cse6 (not (= (mod (mod .cse29 .cse28) 256) 0))) (.cse7 (<= .cse28 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse15 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse20) 256)) (.cse11 (= .cse26 0)) (.cse12 (not (= (mod (mod .cse26 .cse27) 256) 0))) (.cse13 (<= .cse27 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse14 (or .cse0 .cse11 .cse12 .cse13)) (.cse16 (< 127 .cse26)) (.cse10 (<= .cse15 127)) (.cse4 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (or .cse6 .cse0 .cse7)) (.cse3 (<= .cse26 127)) (.cse19 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse18 (mod .cse20 256))) (and (or (let ((.cse8 (= .cse20 0)) (.cse5 (let ((.cse17 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256))) (or (<= .cse17 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse18 .cse17) 256) 0)) .cse19 (= 0 .cse18))))) (and (or .cse3 (and (or .cse4 (and .cse5 (or .cse6 .cse0 .cse7 .cse8))) (or (and .cse9 .cse5) .cse4 .cse10))) (or (and (or (and (or .cse0 .cse11 .cse12 .cse13 .cse8) .cse5) .cse4) (or .cse4 (and .cse14 .cse5) (< 127 .cse15))) .cse16))) (< 127 .cse18)) (or (<= .cse18 127) (let ((.cse22 (let ((.cse24 (+ (- 256) .cse18))) (let ((.cse25 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256))) (or (not (= (mod (mod .cse24 .cse25) 256) 0)) .cse19 (<= .cse25 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (let ((.cse21 (and .cse14 .cse22))) (and (or .cse4 .cse10 .cse21) (or .cse4 .cse21))) .cse16) (or (let ((.cse23 (and .cse9 .cse22))) (and (or .cse23 .cse4 .cse10) (or .cse23 .cse4))) .cse3)))))))))))))) is different from true [2021-11-20 07:50:25,125 WARN L227 SmtUtils]: Spent 19.40s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:50:26,460 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:50:31,039 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0))) (and (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or .cse0 (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0))) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse2 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse2) 256))) (and (not (= .cse1 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse1 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse2 .cse1) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse2 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse5) 256))) (let ((.cse4 (mod .cse3 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse3 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse4 256)) (= (mod (mod .cse5 .cse3) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse5 127) (= .cse4 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse6 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse10 (+ .cse6 (- 256)))) (let ((.cse9 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse10) 256))) (let ((.cse7 (mod .cse9 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse8 (mod .cse10 .cse9))) (and (< 127 .cse6) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256)) (not (= .cse8 0)) (not (= .cse9 0)) (= .cse7 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse9 255) .cse8) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse11 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse14 (+ .cse11 (- 256)))) (let ((.cse12 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse14) 256))) (let ((.cse13 (mod .cse14 .cse12))) (and (< 127 .cse11) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse13 0)) (not (= .cse12 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse12 255) .cse13) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)))) is different from false [2021-11-20 07:51:24,232 WARN L227 SmtUtils]: Spent 31.23s on a formula simplification. DAG size of input: 63 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:52:10,679 WARN L227 SmtUtils]: Spent 43.18s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:52:12,696 WARN L838 $PredicateComparison]: unable to prove that (and (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (+ .cse0 (- 256)))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (let ((.cse1 (mod .cse3 .cse2))) (and (< 127 .cse0) (not (= .cse1 0)) (= (mod .cse2 |c_ULTIMATE.start_gcd_test_#res#1|) 0) (not (= .cse2 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse2 255) .cse1) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse5 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse6 (mod .cse7 .cse5))) (and (< 127 .cse4) (= (mod (mod .cse5 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= .cse6 0)) (not (= .cse5 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse5 255) .cse6) 256))))))))) (< |c_ULTIMATE.start_gcd_test_#res#1| 0)) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (and (not (= .cse8 0)) (= (mod (mod .cse9 .cse8) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (<= .cse9 127) (= (mod .cse8 |c_ULTIMATE.start_gcd_test_#res#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse11 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (and (not (= .cse10 0)) (= (mod (mod .cse11 .cse10) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= .cse11 127)))))) (<= 0 |c_ULTIMATE.start_gcd_test_#res#1|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (< 127 |c_ULTIMATE.start_gcd_test_#res#1|) (<= |c_ULTIMATE.start_gcd_test_#res#1| |c_ULTIMATE.start_main1_~x~0#1|)) (not (= |c_ULTIMATE.start_gcd_test_#res#1| 0))) is different from false [2021-11-20 07:53:11,190 WARN L227 SmtUtils]: Spent 28.98s on a formula simplification. DAG size of input: 63 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:53:21,307 WARN L227 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:53:24,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:53:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:53:26,473 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-11-20 07:53:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:53:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 07:53:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:53:26,475 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:53:26,475 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 07:53:26,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 311.7s TimeCoverageRelationStatistics Valid=137, Invalid=375, Unknown=30, NotChecked=450, Total=992 [2021-11-20 07:53:26,478 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:53:26,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 239 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 1 Unknown, 179 Unchecked, 4.0s Time] [2021-11-20 07:53:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 07:53:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-11-20 07:53:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:53:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-11-20 07:53:26,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 14 [2021-11-20 07:53:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:53:26,488 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-11-20 07:53:26,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:53:26,488 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-11-20 07:53:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:53:26,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:53:26,490 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:53:26,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:53:26,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:53:26,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:53:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:53:26,701 INFO L85 PathProgramCache]: Analyzing trace with hash 571830174, now seen corresponding path program 4 times [2021-11-20 07:53:26,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:53:26,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182707836] [2021-11-20 07:53:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:53:26,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:53:26,713 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:53:26,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600484391] [2021-11-20 07:53:26,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:53:26,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:53:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:53:26,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:53:26,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bf6b739-9df3-43b3-a05a-a39f6dbe138e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:53:26,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:53:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:53:26,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:53:26,936 INFO L286 TraceCheckSpWp]: Computing forward predicates...