./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d3494a64b97ff198f649db9990f4b24e7ade2324c824b5bf3f291e4c895b3e7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:07:25,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:07:25,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:07:25,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:07:25,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:07:25,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:07:25,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:07:25,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:07:25,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:07:25,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:07:25,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:07:25,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:07:25,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:07:25,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:07:25,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:07:25,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:07:25,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:07:25,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:07:25,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:07:25,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:07:25,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:07:25,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:07:25,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:07:25,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:07:25,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:07:25,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:07:25,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:07:25,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:07:25,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:07:25,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:07:25,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:07:25,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:07:25,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:07:25,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:07:25,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:07:25,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:07:25,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:07:25,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:07:25,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:07:25,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:07:25,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:07:25,807 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:07:25,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:07:25,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:07:25,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:07:25,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:07:25,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:07:25,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:07:25,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:07:25,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:07:25,826 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:07:25,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:07:25,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:07:25,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:07:25,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:07:25,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:07:25,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:07:25,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:07:25,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:07:25,827 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:07:25,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:07:25,827 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:07:25,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:07:25,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:07:25,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:07:25,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:07:25,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:07:25,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:07:25,829 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_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d3494a64b97ff198f649db9990f4b24e7ade2324c824b5bf3f291e4c895b3e7 [2021-12-06 20:07:25,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:07:26,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:07:26,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:07:26,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:07:26,016 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:07:26,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_3+newton_2_4.i [2021-12-06 20:07:26,058 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/data/c0f998b6f/68049fa85868496184a58d8135f41047/FLAG2be737355 [2021-12-06 20:07:26,421 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:07:26,421 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/sv-benchmarks/c/combinations/gcd_3+newton_2_4.i [2021-12-06 20:07:26,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/data/c0f998b6f/68049fa85868496184a58d8135f41047/FLAG2be737355 [2021-12-06 20:07:26,436 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/data/c0f998b6f/68049fa85868496184a58d8135f41047 [2021-12-06 20:07:26,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:07:26,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:07:26,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:07:26,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:07:26,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:07:26,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d120ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26, skipping insertion in model container [2021-12-06 20:07:26,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:07:26,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:07:26,583 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_6d4c80f9-00e7-4158-b392-dca1d39ea004/sv-benchmarks/c/combinations/gcd_3+newton_2_4.i[1226,1239] [2021-12-06 20:07:26,608 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_6d4c80f9-00e7-4158-b392-dca1d39ea004/sv-benchmarks/c/combinations/gcd_3+newton_2_4.i[2841,2854] [2021-12-06 20:07:26,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:07:26,617 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:07:26,626 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_6d4c80f9-00e7-4158-b392-dca1d39ea004/sv-benchmarks/c/combinations/gcd_3+newton_2_4.i[1226,1239] [2021-12-06 20:07:26,634 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_6d4c80f9-00e7-4158-b392-dca1d39ea004/sv-benchmarks/c/combinations/gcd_3+newton_2_4.i[2841,2854] [2021-12-06 20:07:26,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:07:26,645 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:07:26,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26 WrapperNode [2021-12-06 20:07:26,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:07:26,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:07:26,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:07:26,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:07:26,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,682 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-06 20:07:26,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:07:26,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:07:26,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:07:26,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:07:26,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:07:26,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:07:26,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:07:26,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:07:26,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (1/1) ... [2021-12-06 20:07:26,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:07:26,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:07:26,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:07:26,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:07:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:07:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-06 20:07:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-06 20:07:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-06 20:07:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-06 20:07:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:07:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:07:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:07:26,826 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:07:26,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:07:26,941 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:07:26,947 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:07:26,947 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 20:07:26,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:07:26 BoogieIcfgContainer [2021-12-06 20:07:26,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:07:26,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:07:26,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:07:26,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:07:26,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:07:26" (1/3) ... [2021-12-06 20:07:26,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2402666f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:07:26, skipping insertion in model container [2021-12-06 20:07:26,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:07:26" (2/3) ... [2021-12-06 20:07:26,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2402666f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:07:26, skipping insertion in model container [2021-12-06 20:07:26,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:07:26" (3/3) ... [2021-12-06 20:07:26,956 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_4.i [2021-12-06 20:07:26,960 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:07:26,960 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 20:07:26,993 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:07:26,999 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 20:07:26,999 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 20:07:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 20:07:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:07:27,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:07:27,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:07:27,016 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:07:27,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:07:27,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-06 20:07:27,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:07:27,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813729476] [2021-12-06 20:07:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:07:27,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:07:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:07:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:07:27,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:07:27,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813729476] [2021-12-06 20:07:27,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813729476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:07:27,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:07:27,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:07:27,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347411489] [2021-12-06 20:07:27,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:07:27,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:07:27,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:07:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:07:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:07:27,205 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:07:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:07:27,247 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-06 20:07:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:07:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 20:07:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:07:27,254 INFO L225 Difference]: With dead ends: 90 [2021-12-06 20:07:27,254 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 20:07:27,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:07:27,260 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:07:27,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:07:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 20:07:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-06 20:07:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 20:07:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-06 20:07:27,288 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-12-06 20:07:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:07:27,288 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-06 20:07:27,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:07:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-06 20:07:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:07:27,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:07:27,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:07:27,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:07:27,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:07:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:07:27,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-06 20:07:27,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:07:27,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960148155] [2021-12-06 20:07:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:07:27,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:07:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:07:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:07:27,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:07:27,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960148155] [2021-12-06 20:07:27,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960148155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:07:27,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:07:27,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:07:27,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961227781] [2021-12-06 20:07:27,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:07:27,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:07:27,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:07:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:07:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:07:27,349 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:07:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:07:27,398 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-06 20:07:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:07:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 20:07:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:07:27,400 INFO L225 Difference]: With dead ends: 36 [2021-12-06 20:07:27,400 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 20:07:27,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:07:27,402 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:07:27,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:07:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 20:07:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 20:07:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 20:07:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-06 20:07:27,410 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-06 20:07:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:07:27,410 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-06 20:07:27,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:07:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-06 20:07:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 20:07:27,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:07:27,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:07:27,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:07:27,412 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:07:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:07:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-06 20:07:27,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:07:27,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770113457] [2021-12-06 20:07:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:07:27,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:07:27,426 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:07:27,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412436657] [2021-12-06 20:07:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:07:27,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:07:27,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:07:27,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:07:27,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:07:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:07:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:07:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:07:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:07:59,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:08:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:08:09,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:08:09,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770113457] [2021-12-06 20:08:09,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:08:09,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412436657] [2021-12-06 20:08:09,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412436657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:08:09,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:08:09,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-06 20:08:09,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712562854] [2021-12-06 20:08:09,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:08:09,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 20:08:09,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:08:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 20:08:09,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=210, Unknown=8, NotChecked=0, Total=272 [2021-12-06 20:08:09,202 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:08:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:08:14,207 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-06 20:08:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:08:14,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 20:08:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:08:14,209 INFO L225 Difference]: With dead ends: 42 [2021-12-06 20:08:14,209 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 20:08:14,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=74, Invalid=258, Unknown=10, NotChecked=0, Total=342 [2021-12-06 20:08:14,211 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:08:14,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-06 20:08:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 20:08:14,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-06 20:08:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 20:08:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-06 20:08:14,217 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-06 20:08:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:08:14,217 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-06 20:08:14,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:08:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-06 20:08:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:08:14,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:08:14,219 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:08:14,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:08:14,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-06 20:08:14,421 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:08:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:08:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-12-06 20:08:14,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:08:14,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540570301] [2021-12-06 20:08:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:08:14,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:08:14,460 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:08:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398060659] [2021-12-06 20:08:14,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:08:14,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:08:14,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:08:14,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:08:14,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:08:14,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:08:14,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:08:14,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:08:14,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:08:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:08:17,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:08:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:08:59,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:08:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540570301] [2021-12-06 20:08:59,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:08:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398060659] [2021-12-06 20:08:59,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398060659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:08:59,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:08:59,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-06 20:08:59,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635189641] [2021-12-06 20:08:59,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:08:59,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:08:59,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:08:59,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:08:59,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=180, Unknown=11, NotChecked=0, Total=240 [2021-12-06 20:08:59,933 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:00,081 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-06 20:09:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:09:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 20:09:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:00,083 INFO L225 Difference]: With dead ends: 43 [2021-12-06 20:09:00,083 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 20:09:00,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=49, Invalid=180, Unknown=11, NotChecked=0, Total=240 [2021-12-06 20:09:00,084 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:00,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-06 20:09:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 20:09:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 20:09:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 20:09:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-06 20:09:00,089 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-12-06 20:09:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:00,090 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-06 20:09:00,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-06 20:09:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 20:09:00,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:00,091 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:00,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:09:00,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:00,292 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-12-06 20:09:00,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:00,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310595182] [2021-12-06 20:09:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:00,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:00,307 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:09:00,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333281621] [2021-12-06 20:09:00,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:09:00,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:00,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:00,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:09:00,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:09:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:00,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 20:09:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:20,242 WARN L227 SmtUtils]: Spent 6.95s 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) [2021-12-06 20:10:09,415 WARN L227 SmtUtils]: Spent 18.75s on a formula simplification. DAG size of input: 60 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:10:12,046 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |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))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (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 ((.cse2 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse5 (+ .cse2 (- 256)))) (let ((.cse4 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse5) 256))) (let ((.cse3 (mod .cse5 .cse4))) (and (< 127 .cse2) (not (= .cse3 0)) (not (= .cse4 0)) (= (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse4 255) .cse3) 256))))))))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-12-06 20:10:14,725 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (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) (= (mod (mod .cse1 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= .cse2 0)) (not (= .cse1 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse1 255) .cse2) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse4 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse5) 256))) (and (not (= .cse4 0)) (= (mod (mod .cse5 .cse4) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= .cse5 127)))))) (not (= |c_ULTIMATE.start_gcd_test_#res#1| 0))) is different from false [2021-12-06 20:10:48,190 WARN L227 SmtUtils]: Spent 20.00s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:10:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:55,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:26,355 WARN L227 SmtUtils]: Spent 1.10m on a formula simplification. DAG size of input: 82 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:14:01,692 WARN L838 $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 false [2021-12-06 20:15:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 20:15:02,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:02,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310595182] [2021-12-06 20:15:02,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:15:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333281621] [2021-12-06 20:15:02,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333281621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:02,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:15:02,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-06 20:15:02,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777909397] [2021-12-06 20:15:02,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:02,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 20:15:02,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 20:15:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=220, Unknown=20, NotChecked=102, Total=420 [2021-12-06 20:15:02,897 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:15:05,277 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 [2021-12-06 20:15:44,697 WARN L227 SmtUtils]: Spent 23.36s on a formula simplification. DAG size of input: 51 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:16:05,931 WARN L227 SmtUtils]: Spent 11.06s on a formula simplification. DAG size of input: 51 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:16:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:16:05,937 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-12-06 20:16:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:16:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 20:16:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:16:05,938 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:16:05,938 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 20:16:05,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 248.0s TimeCoverageRelationStatistics Valid=102, Invalid=308, Unknown=26, NotChecked=164, Total=600 [2021-12-06 20:16:05,939 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:16:05,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 287 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2021-12-06 20:16:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 20:16:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-06 20:16:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 20:16:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-06 20:16:05,943 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 14 [2021-12-06 20:16:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:16:05,944 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-06 20:16:05,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-06 20:16:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 20:16:05,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:16:05,945 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:16:05,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 20:16:06,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:16:06,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:16:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:16:06,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1911673028, now seen corresponding path program 1 times [2021-12-06 20:16:06,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:16:06,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176993469] [2021-12-06 20:16:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:16:06,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:16:06,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:16:06,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734806950] [2021-12-06 20:16:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:16:06,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:16:06,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:16:06,161 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:16:06,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c80f9-00e7-4158-b392-dca1d39ea004/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:16:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:06,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 20:16:06,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:16:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:26,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:05,230 WARN L227 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 75 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)