./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_2_4.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_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/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_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_2_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/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_56d07efa-a7e8-41fc-9858-b340ea778e8d/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 add45819e4621ede17512a8acbf89201f3f4db1ab1bf97afdd66c20e4064e4cd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:31:55,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:31:55,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:31:55,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:31:55,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:31:55,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:31:55,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:31:55,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:31:55,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:31:55,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:31:55,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:31:55,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:31:55,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:31:55,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:31:55,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:31:55,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:31:55,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:31:55,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:31:55,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:31:55,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:31:55,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:31:55,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:31:55,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:31:55,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:31:55,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:31:55,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:31:55,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:31:55,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:31:55,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:31:55,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:31:55,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:31:55,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:31:55,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:31:55,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:31:55,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:31:55,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:31:55,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:31:55,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:31:55,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:31:55,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:31:55,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:31:55,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:31:55,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:31:55,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:31:55,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:31:55,848 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:31:55,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:31:55,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:31:55,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:31:55,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:31:55,857 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:31:55,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:31:55,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:31:55,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:31:55,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:31:55,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:31:55,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:31:55,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:31:55,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:31:55,860 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:31:55,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:31:55,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:31:55,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:31:55,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:31:55,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:31:55,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:31:55,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:31:55,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:31:55,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:31:55,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:31:55,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:31:55,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:31:55,865 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:31:55,866 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:31:55,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:31:55,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:31:55,866 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_56d07efa-a7e8-41fc-9858-b340ea778e8d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> add45819e4621ede17512a8acbf89201f3f4db1ab1bf97afdd66c20e4064e4cd [2021-11-20 05:31:56,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:31:56,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:31:56,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:31:56,128 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:31:56,128 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:31:56,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/gcd_2+newton_2_4.i [2021-11-20 05:31:56,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/data/5e883e4ee/c7cfad7e3c634891a6e364c97a1fcf7f/FLAGac0a9292e [2021-11-20 05:31:56,629 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:31:56,630 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i [2021-11-20 05:31:56,637 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/data/5e883e4ee/c7cfad7e3c634891a6e364c97a1fcf7f/FLAGac0a9292e [2021-11-20 05:31:56,653 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/data/5e883e4ee/c7cfad7e3c634891a6e364c97a1fcf7f [2021-11-20 05:31:56,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:31:56,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:31:56,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:31:56,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:31:56,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:31:56,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:56,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aadf8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56, skipping insertion in model container [2021-11-20 05:31:56,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:56,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:31:56,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:31:56,892 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_56d07efa-a7e8-41fc-9858-b340ea778e8d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[1226,1239] [2021-11-20 05:31:56,920 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_56d07efa-a7e8-41fc-9858-b340ea778e8d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[2841,2854] [2021-11-20 05:31:56,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:31:56,930 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:31:56,943 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_56d07efa-a7e8-41fc-9858-b340ea778e8d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[1226,1239] [2021-11-20 05:31:56,957 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_56d07efa-a7e8-41fc-9858-b340ea778e8d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[2841,2854] [2021-11-20 05:31:56,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:31:56,972 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:31:56,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56 WrapperNode [2021-11-20 05:31:56,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:31:56,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:31:56,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:31:56,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:31:56,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,038 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-11-20 05:31:57,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:31:57,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:31:57,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:31:57,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:31:57,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:31:57,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:31:57,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:31:57,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:31:57,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (1/1) ... [2021-11-20 05:31:57,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:31:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:57,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:31:57,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:31:57,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:31:57,167 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-20 05:31:57,167 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-20 05:31:57,167 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-20 05:31:57,169 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-20 05:31:57,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:31:57,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:31:57,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:31:57,247 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:31:57,248 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:31:57,419 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:31:57,426 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:31:57,426 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:31:57,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:31:57 BoogieIcfgContainer [2021-11-20 05:31:57,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:31:57,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:31:57,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:31:57,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:31:57,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:31:56" (1/3) ... [2021-11-20 05:31:57,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678fc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:31:57, skipping insertion in model container [2021-11-20 05:31:57,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:56" (2/3) ... [2021-11-20 05:31:57,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678fc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:31:57, skipping insertion in model container [2021-11-20 05:31:57,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:31:57" (3/3) ... [2021-11-20 05:31:57,436 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_4.i [2021-11-20 05:31:57,442 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:31:57,442 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 05:31:57,525 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:31:57,560 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 05:31:57,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 05:31:57,578 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 05:31:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:31:57,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:57,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:57,585 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:57,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-11-20 05:31:57,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:57,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725505032] [2021-11-20 05:31:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:57,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:57,800 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 05:31:57,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:57,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725505032] [2021-11-20 05:31:57,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725505032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:31:57,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:31:57,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:31:57,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653697265] [2021-11-20 05:31:57,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:31:57,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:31:57,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:31:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:31:57,840 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 05:31:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:57,897 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-11-20 05:31:57,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:31:57,900 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 05:31:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:57,908 INFO L225 Difference]: With dead ends: 89 [2021-11-20 05:31:57,908 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 05:31:57,911 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 05:31:57,915 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 115 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 05:31:57,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 115 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 05:31:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-11-20 05:31:57,953 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 05:31:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-20 05:31:57,956 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-11-20 05:31:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:57,957 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-20 05:31:57,957 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 05:31:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-20 05:31:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:31:57,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:57,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:57,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:31:57,960 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:57,961 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2021-11-20 05:31:57,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:57,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458199163] [2021-11-20 05:31:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:57,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:58,020 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 05:31:58,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:58,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458199163] [2021-11-20 05:31:58,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458199163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:31:58,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:31:58,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:31:58,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55234208] [2021-11-20 05:31:58,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:31:58,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:31:58,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:31:58,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:31:58,024 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. 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 05:31:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:58,062 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-20 05:31:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:31:58,066 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 05:31:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:58,067 INFO L225 Difference]: With dead ends: 36 [2021-11-20 05:31:58,068 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 05:31:58,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:31:58,070 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:58,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 05:31:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-20 05:31:58,077 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 05:31:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-20 05:31:58,083 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-11-20 05:31:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:58,087 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-20 05:31:58,088 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 05:31:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-20 05:31:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:31:58,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:58,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:58,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:31:58,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2021-11-20 05:31:58,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:58,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245062722] [2021-11-20 05:31:58,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:58,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:58,137 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:31:58,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75216539] [2021-11-20 05:31:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:58,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:58,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:58,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:31:58,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:31:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:58,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:31:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:31:58,380 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 05:31:58,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:31:58,480 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 05:31:58,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:58,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245062722] [2021-11-20 05:31:58,481 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:31:58,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75216539] [2021-11-20 05:31:58,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75216539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:31:58,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:31:58,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-20 05:31:58,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482837652] [2021-11-20 05:31:58,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:31:58,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:31:58,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:58,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:31:58,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:31:58,491 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:31:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:58,600 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-20 05:31:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:31:58,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 05:31:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:58,604 INFO L225 Difference]: With dead ends: 37 [2021-11-20 05:31:58,604 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 05:31:58,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:31:58,609 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:58,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 05:31:58,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 05:31:58,624 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 05:31:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-20 05:31:58,627 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-11-20 05:31:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:58,628 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-20 05:31:58,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:31:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-20 05:31:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:31:58,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:58,630 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:58,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:31:58,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:58,842 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2021-11-20 05:31:58,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:58,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117694960] [2021-11-20 05:31:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:58,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:58,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:31:58,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827411582] [2021-11-20 05:31:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:31:58,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:58,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:58,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:31:58,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:31:58,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:31:58,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:31:58,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 05:31:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:52,780 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 05:32:52,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:32,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:32,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117694960] [2021-11-20 05:34:32,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:32,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827411582] [2021-11-20 05:34:32,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827411582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:32,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:32,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-20 05:34:32,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704841666] [2021-11-20 05:34:32,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:32,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:34:32,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:32,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:34:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=202, Unknown=19, NotChecked=0, Total=272 [2021-11-20 05:34:32,917 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:56,739 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-20 05:34:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:34:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 05:34:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:56,742 INFO L225 Difference]: With dead ends: 42 [2021-11-20 05:34:56,742 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 05:34:56,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 91.8s TimeCoverageRelationStatistics Valid=65, Invalid=257, Unknown=20, NotChecked=0, Total=342 [2021-11-20 05:34:56,744 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:56,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2021-11-20 05:34:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 05:34:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-20 05:34:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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 05:34:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-20 05:34:56,753 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2021-11-20 05:34:56,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:56,754 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-20 05:34:56,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-20 05:34:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 05:34:56,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:56,756 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:56,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:56,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:56,974 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2084161321, now seen corresponding path program 3 times [2021-11-20 05:34:56,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:56,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356724155] [2021-11-20 05:34:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:56,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:56,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:56,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260722973] [2021-11-20 05:34:56,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:56,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:56,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:56,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:56,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56d07efa-a7e8-41fc-9858-b340ea778e8d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:34:57,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:34:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:57,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 05:34:57,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:46,662 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 80 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:42:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:42:57,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:42,947 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse31 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse23 (+ 256 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse32 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 256)) (.cse33 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse31) 256))) (let ((.cse6 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse33) 256) 0))) (.cse8 (<= .cse33 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse9 (= .cse33 0)) (.cse12 (< 127 .cse33)) (.cse13 (<= .cse33 127)) (.cse1 (<= .cse32 127)) (.cse5 (< 127 .cse32)) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse33)) 256) 0))) (.cse16 (<= .cse33 .cse23)) (.cse11 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse20 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 0))) (.cse21 (<= .cse32 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse22 (= .cse32 0)) (.cse17 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse7 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse18 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse32)) 256)))) (.cse19 (<= .cse32 .cse23)) (.cse24 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse0 (mod .cse31 256))) (and (or (<= .cse0 127) (let ((.cse10 (or (<= .cse0 .cse23) .cse24 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse0)) 256) 0))))) (let ((.cse4 (or (and .cse10 (or .cse7 .cse20 .cse21 .cse22)) .cse17)) (.cse2 (or .cse17 (and (or .cse7 .cse18 .cse19) .cse10)))) (and (or (let ((.cse3 (or (and (or .cse6 .cse7 .cse8 .cse9) .cse10) .cse11))) (and (or .cse1 (and .cse2 .cse3)) (or (and .cse4 .cse3) .cse5))) .cse12) (or .cse13 (let ((.cse14 (or .cse11 (and .cse10 (or .cse7 .cse15 .cse16))))) (and (or (and .cse4 .cse14) .cse5) (or (and .cse2 .cse14) .cse1)))))))) (or (let ((.cse28 (= .cse31 0))) (let ((.cse29 (or (<= .cse0 |c_ULTIMATE.start_main1_~y~0#1|) (and (not .cse28) .cse24) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse0) 256) 0)) (= 0 .cse0)))) (let ((.cse27 (or .cse17 (and (or .cse7 .cse18 .cse28 .cse19) .cse29))) (.cse25 (or .cse17 (and (or .cse7 .cse20 .cse21 .cse22 .cse28) .cse29)))) (and (or (let ((.cse26 (or .cse11 (and (or .cse6 .cse7 .cse8 .cse9 .cse28) .cse29)))) (and (or (and .cse25 .cse26) .cse5) (or .cse1 (and .cse27 .cse26)))) .cse12) (or .cse13 (let ((.cse30 (or (and (or .cse7 .cse15 .cse28 .cse16) .cse29) .cse11))) (and (or (and .cse27 .cse30) .cse1) (or (and .cse30 .cse25) .cse5)))))))) (< 127 .cse0))))))) is different from false