./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_3_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_3_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 613ee8845912b921567ac9e82f8c414d8758c61c69ed2c2ac2cbc303a1b4f001 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:30:27,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:30:27,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:30:27,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:30:27,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:30:27,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:30:27,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:30:27,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:30:27,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:30:27,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:30:27,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:30:27,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:30:27,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:30:27,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:30:27,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:30:27,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:30:27,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:30:27,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:30:27,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:30:27,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:30:27,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:30:27,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:30:27,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:30:27,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:30:27,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:30:27,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:30:27,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:30:27,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:30:27,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:30:27,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:30:27,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:30:27,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:30:27,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:30:27,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:30:27,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:30:27,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:30:27,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:30:27,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:30:27,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:30:27,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:30:27,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:30:27,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:30:27,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:30:27,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:30:27,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:30:27,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:30:27,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:30:27,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:30:27,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:30:27,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:30:27,948 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:30:27,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:30:27,950 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:30:27,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:30:27,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:30:27,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:30:27,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:30:27,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:30:27,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:30:27,952 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:30:27,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:30:27,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:30:27,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:30:27,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:30:27,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:30:27,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:30:27,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:30:27,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:30:27,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:30:27,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:30:27,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:30:27,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:30:27,956 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:30:27,956 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:30:27,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:30:27,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:30:27,957 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_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613ee8845912b921567ac9e82f8c414d8758c61c69ed2c2ac2cbc303a1b4f001 [2021-11-13 18:30:28,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:30:28,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:30:28,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:30:28,315 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:30:28,316 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:30:28,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/gcd_2+newton_3_1.i [2021-11-13 18:30:28,421 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/data/74d984957/24f89a50890846e9a5a7aafeecda3319/FLAG6c3d072af [2021-11-13 18:30:29,050 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:30:29,055 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/sv-benchmarks/c/combinations/gcd_2+newton_3_1.i [2021-11-13 18:30:29,071 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/data/74d984957/24f89a50890846e9a5a7aafeecda3319/FLAG6c3d072af [2021-11-13 18:30:29,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/data/74d984957/24f89a50890846e9a5a7aafeecda3319 [2021-11-13 18:30:29,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:30:29,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:30:29,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:30:29,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:30:29,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:30:29,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4057deca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29, skipping insertion in model container [2021-11-13 18:30:29,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:30:29,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:30:29,636 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/sv-benchmarks/c/combinations/gcd_2+newton_3_1.i[1226,1239] [2021-11-13 18:30:29,669 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/sv-benchmarks/c/combinations/gcd_2+newton_3_1.i[2862,2875] [2021-11-13 18:30:29,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:30:29,683 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:30:29,698 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/sv-benchmarks/c/combinations/gcd_2+newton_3_1.i[1226,1239] [2021-11-13 18:30:29,713 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/sv-benchmarks/c/combinations/gcd_2+newton_3_1.i[2862,2875] [2021-11-13 18:30:29,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:30:29,730 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:30:29,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29 WrapperNode [2021-11-13 18:30:29,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:30:29,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:30:29,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:30:29,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:30:29,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:30:29,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:30:29,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:30:29,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:30:29,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:30:29,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:30:29,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:30:29,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:30:29,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (1/1) ... [2021-11-13 18:30:29,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:30:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:29,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:30:29,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:30:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-13 18:30:29,918 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-13 18:30:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:30:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-13 18:30:29,920 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-13 18:30:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:30:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:30:29,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:30:30,249 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:30:30,250 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:30:30,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:30:30 BoogieIcfgContainer [2021-11-13 18:30:30,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:30:30,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:30:30,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:30:30,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:30:30,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:30:29" (1/3) ... [2021-11-13 18:30:30,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144bdd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:30:30, skipping insertion in model container [2021-11-13 18:30:30,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:29" (2/3) ... [2021-11-13 18:30:30,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@144bdd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:30:30, skipping insertion in model container [2021-11-13 18:30:30,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:30:30" (3/3) ... [2021-11-13 18:30:30,264 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_3_1.i [2021-11-13 18:30:30,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:30:30,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:30:30,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:30:30,401 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:30:30,402 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:30:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:30:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:30:30,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:30,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:30,461 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-11-13 18:30:30,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:30,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485690090] [2021-11-13 18:30:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:30,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:30,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:30,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485690090] [2021-11-13 18:30:30,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485690090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:30,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:30,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:30:30,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284243079] [2021-11-13 18:30:30,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:30,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:30:30,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:30:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:30,929 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:31,051 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-11-13 18:30:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:30:31,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:30:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:31,065 INFO L225 Difference]: With dead ends: 95 [2021-11-13 18:30:31,066 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 18:30:31,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:31,084 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 21 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.98ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:31,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 130 Invalid, 19 Unknown, 0 Unchecked, 13.98ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 46.55ms Time] [2021-11-13 18:30:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 18:30:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-11-13 18:30:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:30:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-13 18:30:31,133 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2021-11-13 18:30:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:31,133 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-13 18:30:31,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-13 18:30:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:30:31,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:31,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:31,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:30:31,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2021-11-13 18:30:31,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:31,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185447208] [2021-11-13 18:30:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:31,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:31,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:31,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185447208] [2021-11-13 18:30:31,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185447208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:31,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:31,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:30:31,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377411057] [2021-11-13 18:30:31,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:31,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:30:31,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:30:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:31,203 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2021-11-13 18:30:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:31,232 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-13 18:30:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:30:31,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:30:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:31,234 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:30:31,234 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 18:30:31,235 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 [2021-11-13 18:30:31,237 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:31,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 97 Invalid, 10 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 12.73ms Time] [2021-11-13 18:30:31,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 18:30:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-13 18:30:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:30:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-13 18:30:31,246 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-11-13 18:30:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:31,247 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-13 18:30:31,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-13 18:30:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:30:31,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:31,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:31,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:30:31,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2021-11-13 18:30:31,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:31,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905329478] [2021-11-13 18:30:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:31,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:31,268 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:31,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562437154] [2021-11-13 18:30:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:31,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:31,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:31,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:31,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:30:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:30:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:31,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:31,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:31,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905329478] [2021-11-13 18:30:31,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:30:31,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562437154] [2021-11-13 18:30:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562437154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:31,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:31,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-13 18:30:31,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266860664] [2021-11-13 18:30:31,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:31,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:30:31,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:31,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:30:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:30:31,694 INFO L87 Difference]: Start difference. First operand 33 states and 38 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) [2021-11-13 18:30:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:31,811 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-13 18:30:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:30:31,812 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 [2021-11-13 18:30:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:31,815 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:30:31,815 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 18:30:31,816 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 [2021-11-13 18:30:31,821 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:31,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 183 Invalid, 40 Unknown, 0 Unchecked, 4.26ms Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 60.91ms Time] [2021-11-13 18:30:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 18:30:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-13 18:30:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:30:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-13 18:30:31,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-11-13 18:30:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:31,847 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-13 18:30:31,848 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) [2021-11-13 18:30:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-13 18:30:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:30:31,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:31,850 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:31,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:30:32,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:32,066 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:32,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2021-11-13 18:30:32,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:32,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136353672] [2021-11-13 18:30:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:32,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:32,087 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:32,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148437303] [2021-11-13 18:30:32,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:30:32,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:32,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:32,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:32,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:30:32,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:30:32,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:30:32,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:30:32,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:31:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:31:27,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:32:40,153 WARN L227 SmtUtils]: Spent 7.71s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:33:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:33:02,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:33:02,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136353672] [2021-11-13 18:33:02,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:33:02,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148437303] [2021-11-13 18:33:02,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148437303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:33:02,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:33:02,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-13 18:33:02,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581118902] [2021-11-13 18:33:02,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:33:02,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:33:02,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:33:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:33:02,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=205, Unknown=16, NotChecked=0, Total=272 [2021-11-13 18:33:02,711 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:33:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:33:24,665 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-11-13 18:33:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:33:24,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 18:33:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:33:24,667 INFO L225 Difference]: With dead ends: 45 [2021-11-13 18:33:24,667 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 18:33:24,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 86.8s TimeCoverageRelationStatistics Valid=65, Invalid=260, Unknown=17, NotChecked=0, Total=342 [2021-11-13 18:33:24,669 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 43.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:33:24,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 235 Invalid, 38 Unknown, 0 Unchecked, 2.26ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 24 Unchecked, 43.43ms Time] [2021-11-13 18:33:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 18:33:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-13 18:33:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:33:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-13 18:33:24,676 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2021-11-13 18:33:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:33:24,676 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-13 18:33:24,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:33:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-13 18:33:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:33:24,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:33:24,678 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:33:24,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:33:24,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:33:24,879 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:33:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:33:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2084161321, now seen corresponding path program 3 times [2021-11-13 18:33:24,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:33:24,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909960953] [2021-11-13 18:33:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:33:24,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:33:24,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:33:24,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658143826] [2021-11-13 18:33:24,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:33:24,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:33:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:33:24,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:33:24,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed10aae5-f8cc-413c-8b55-c2d75c0637bc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:33:25,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:33:25,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:33:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 18:33:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates...