./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL --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 cefb3bae89bbacb2fe493d14201bba1802fb381afd861fd412b13151077489a8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:48:35,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:48:35,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:48:35,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:48:35,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:48:35,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:48:35,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:48:35,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:48:35,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:48:35,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:48:35,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:48:35,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:48:35,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:48:35,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:48:35,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:48:35,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:48:35,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:48:35,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:48:35,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:48:35,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:48:35,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:48:35,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:48:35,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:48:35,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:48:35,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:48:35,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:48:35,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:48:35,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:48:35,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:48:35,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:48:35,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:48:35,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:48:35,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:48:35,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:48:35,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:48:35,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:48:35,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:48:35,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:48:35,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:48:35,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:48:35,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:48:35,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:48:35,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:48:35,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:48:35,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:48:35,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:48:35,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:48:35,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:48:35,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:48:35,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:48:35,865 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:48:35,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:48:35,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:48:35,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:48:35,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:48:35,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:48:35,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:48:35,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:48:35,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:48:35,867 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:48:35,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:48:35,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:48:35,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:48:35,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:48:35,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:48:35,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:48:35,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:48:35,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:48:35,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:48:35,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:48:35,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:48:35,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:48:35,871 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:48:35,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:48:35,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:48:35,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:48:35,872 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_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cefb3bae89bbacb2fe493d14201bba1802fb381afd861fd412b13151077489a8 [2021-11-19 04:48:36,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:48:36,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:48:36,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:48:36,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:48:36,296 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:48:36,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/combinations/gcd_3+newton_3_6.i [2021-11-19 04:48:36,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/data/756877bd6/4d98770e5f9741ba963f100de5d8a969/FLAG484bd2325 [2021-11-19 04:48:37,070 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:48:37,071 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i [2021-11-19 04:48:37,080 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/data/756877bd6/4d98770e5f9741ba963f100de5d8a969/FLAG484bd2325 [2021-11-19 04:48:37,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/data/756877bd6/4d98770e5f9741ba963f100de5d8a969 [2021-11-19 04:48:37,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:48:37,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:48:37,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:48:37,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:48:37,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:48:37,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da1953d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37, skipping insertion in model container [2021-11-19 04:48:37,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:48:37,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:48:37,706 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_98f37789-2cba-40a2-8b3a-adff6691f6f0/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i[1226,1239] [2021-11-19 04:48:37,750 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_98f37789-2cba-40a2-8b3a-adff6691f6f0/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i[2862,2875] [2021-11-19 04:48:37,752 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:48:37,762 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:48:37,778 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_98f37789-2cba-40a2-8b3a-adff6691f6f0/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i[1226,1239] [2021-11-19 04:48:37,795 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_98f37789-2cba-40a2-8b3a-adff6691f6f0/sv-benchmarks/c/combinations/gcd_3+newton_3_6.i[2862,2875] [2021-11-19 04:48:37,797 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:48:37,815 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:48:37,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37 WrapperNode [2021-11-19 04:48:37,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:48:37,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:48:37,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:48:37,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:48:37,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,877 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-11-19 04:48:37,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:48:37,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:48:37,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:48:37,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:48:37,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:48:37,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:48:37,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:48:37,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:48:37,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (1/1) ... [2021-11-19 04:48:37,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:48:37,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:37,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:48:37,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:48:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:48:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-19 04:48:38,017 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-19 04:48:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-19 04:48:38,018 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-19 04:48:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:48:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:48:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:48:38,099 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:48:38,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:48:38,354 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:48:38,363 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:48:38,363 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:48:38,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:38 BoogieIcfgContainer [2021-11-19 04:48:38,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:48:38,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:48:38,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:48:38,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:48:38,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:37" (1/3) ... [2021-11-19 04:48:38,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a48f597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:38, skipping insertion in model container [2021-11-19 04:48:38,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:37" (2/3) ... [2021-11-19 04:48:38,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a48f597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:38, skipping insertion in model container [2021-11-19 04:48:38,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:38" (3/3) ... [2021-11-19 04:48:38,376 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_6.i [2021-11-19 04:48:38,382 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:48:38,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 04:48:38,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:48:38,468 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 [2021-11-19 04:48:38,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 04:48:38,521 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) [2021-11-19 04:48:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:48:38,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:38,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:38,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-11-19 04:48:38,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:38,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609017076] [2021-11-19 04:48:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:38,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:48:38,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:38,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609017076] [2021-11-19 04:48:38,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609017076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:38,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:38,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:48:38,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114917629] [2021-11-19 04:48:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:38,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:48:38,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:48:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:48:38,924 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) [2021-11-19 04:48:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:39,052 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2021-11-19 04:48:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:48:39,056 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 [2021-11-19 04:48:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:39,066 INFO L225 Difference]: With dead ends: 96 [2021-11-19 04:48:39,066 INFO L226 Difference]: Without dead ends: 39 [2021-11-19 04:48:39,072 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 [2021-11-19 04:48:39,083 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:39,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:48:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-19 04:48:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-11-19 04:48:39,165 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) [2021-11-19 04:48:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-19 04:48:39,168 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2021-11-19 04:48:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:39,170 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-19 04:48:39,170 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) [2021-11-19 04:48:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-19 04:48:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:48:39,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:39,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:39,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:48:39,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-11-19 04:48:39,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:39,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251322649] [2021-11-19 04:48:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:39,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:48:39,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:48:39,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251322649] [2021-11-19 04:48:39,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251322649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:48:39,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:48:39,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:48:39,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46299294] [2021-11-19 04:48:39,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:48:39,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:48:39,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:48:39,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:48:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:48:39,307 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:39,404 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-19 04:48:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:48:39,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-19 04:48:39,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:39,406 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:48:39,407 INFO L226 Difference]: Without dead ends: 33 [2021-11-19 04:48:39,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:48:39,410 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 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 [2021-11-19 04:48:39,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:48:39,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-19 04:48:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-19 04:48:39,420 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) [2021-11-19 04:48:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-19 04:48:39,422 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-11-19 04:48:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:39,423 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-19 04:48:39,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:48:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-19 04:48:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:48:39,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:39,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:39,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:48:39,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:48:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-11-19 04:48:39,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:48:39,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698772351] [2021-11-19 04:48:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:39,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:48:39,444 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:48:39,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145472959] [2021-11-19 04:48:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:48:39,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:48:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:48:39,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:48:39,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:48:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:48:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:48:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:49:06,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:49:13,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:13,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698772351] [2021-11-19 04:49:13,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:49:13,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145472959] [2021-11-19 04:49:13,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145472959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:13,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:49:13,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-19 04:49:13,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852160000] [2021-11-19 04:49:13,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:13,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:49:13,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:49:13,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=208, Unknown=10, NotChecked=0, Total=272 [2021-11-19 04:49:13,978 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:14,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:14,220 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-19 04:49:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:49:14,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 04:49:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:14,222 INFO L225 Difference]: With dead ends: 41 [2021-11-19 04:49:14,223 INFO L226 Difference]: Without dead ends: 35 [2021-11-19 04:49:14,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=63, Invalid=233, Unknown=10, NotChecked=0, Total=306 [2021-11-19 04:49:14,225 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:14,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-11-19 04:49:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-19 04:49:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-11-19 04:49:14,233 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) [2021-11-19 04:49:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-19 04:49:14,235 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-11-19 04:49:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:14,236 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-19 04:49:14,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-19 04:49:14,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:49:14,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:14,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:14,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:14,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:14,452 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:14,453 INFO L85 PathProgramCache]: Analyzing trace with hash 20667420, now seen corresponding path program 1 times [2021-11-19 04:49:14,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:14,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173432892] [2021-11-19 04:49:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:14,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:14,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:49:14,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207724975] [2021-11-19 04:49:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:14,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:14,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:14,491 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:14,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:49:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:49:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:49:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:49:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:49:39,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:49:54,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:49:54,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173432892] [2021-11-19 04:49:54,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:49:54,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207724975] [2021-11-19 04:49:54,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207724975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:49:54,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:49:54,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-19 04:49:54,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775451116] [2021-11-19 04:49:54,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:49:54,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:49:54,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:49:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:49:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=175, Unknown=12, NotChecked=0, Total=240 [2021-11-19 04:49:54,409 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:49:55,523 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-11-19 04:49:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:49:55,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 04:49:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:49:55,525 INFO L225 Difference]: With dead ends: 46 [2021-11-19 04:49:55,526 INFO L226 Difference]: Without dead ends: 37 [2021-11-19 04:49:55,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=62, Invalid=198, Unknown=12, NotChecked=0, Total=272 [2021-11-19 04:49:55,528 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:49:55,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 281 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2021-11-19 04:49:55,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-19 04:49:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-11-19 04:49:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-11-19 04:49:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-19 04:49:55,539 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2021-11-19 04:49:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:49:55,540 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-19 04:49:55,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:49:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-19 04:49:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 04:49:55,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:49:55,542 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:49:55,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:49:55,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:55,747 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:49:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:49:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2021-11-19 04:49:55,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:49:55,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980987617] [2021-11-19 04:49:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:49:55,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:49:55,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:49:55,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881685387] [2021-11-19 04:49:55,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:49:55,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:49:55,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:49:55,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:49:55,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f37789-2cba-40a2-8b3a-adff6691f6f0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:49:55,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:49:55,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:49:55,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 04:49:55,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:53:24,494 WARN L227 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 15 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 04:54:01,292 WARN L227 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 13 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 05:02:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:02:29,690 INFO L328 TraceCheckSpWp]: Computing backward predicates...