./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_2_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_2_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f8505e46ba1dfd9d1ec3a293aaba2f619b40b1a80d91e8d871194a57c70c939 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:03:54,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:03:54,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:03:54,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:03:54,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:03:54,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:03:54,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:03:54,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:03:54,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:03:54,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:03:54,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:03:54,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:03:54,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:03:54,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:03:54,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:03:54,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:03:54,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:03:54,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:03:54,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:03:54,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:03:54,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:03:54,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:03:54,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:03:54,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:03:54,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:03:54,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:03:54,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:03:54,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:03:54,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:03:54,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:03:54,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:03:54,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:03:54,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:03:54,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:03:54,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:03:54,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:03:54,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:03:54,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:03:54,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:03:54,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:03:54,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:03:54,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:03:54,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:03:54,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:03:54,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:03:54,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:03:54,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:03:54,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:03:54,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:03:54,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:03:54,244 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:03:54,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:03:54,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:03:54,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:03:54,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:03:54,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:03:54,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:03:54,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:03:54,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:03:54,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:03:54,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:03:54,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:03:54,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:03:54,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:03:54,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:03:54,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:03:54,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:03:54,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:03:54,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:03:54,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:03:54,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:03:54,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:03:54,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:03:54,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:03:54,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:03:54,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:03:54,249 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_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f8505e46ba1dfd9d1ec3a293aaba2f619b40b1a80d91e8d871194a57c70c939 [2021-11-20 07:03:54,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:03:54,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:03:54,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:03:54,569 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:03:54,570 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:03:54,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/gcd_2+newton_2_1.i [2021-11-20 07:03:54,695 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/data/fe94165a4/7e136d693d824c4b81c1669bf95e6a6d/FLAGfe3bf3ff9 [2021-11-20 07:03:55,172 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:03:55,173 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/sv-benchmarks/c/combinations/gcd_2+newton_2_1.i [2021-11-20 07:03:55,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/data/fe94165a4/7e136d693d824c4b81c1669bf95e6a6d/FLAGfe3bf3ff9 [2021-11-20 07:03:55,554 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/data/fe94165a4/7e136d693d824c4b81c1669bf95e6a6d [2021-11-20 07:03:55,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:03:55,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:03:55,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:03:55,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:03:55,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:03:55,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:03:55" (1/1) ... [2021-11-20 07:03:55,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d789ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:55, skipping insertion in model container [2021-11-20 07:03:55,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:03:55" (1/1) ... [2021-11-20 07:03:55,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:03:55,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:03:55,842 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_12dcefc8-044a-439a-8d92-060a7f0c17d8/sv-benchmarks/c/combinations/gcd_2+newton_2_1.i[1226,1239] [2021-11-20 07:03:55,896 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_12dcefc8-044a-439a-8d92-060a7f0c17d8/sv-benchmarks/c/combinations/gcd_2+newton_2_1.i[2841,2854] [2021-11-20 07:03:55,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:03:55,924 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:03:55,950 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_12dcefc8-044a-439a-8d92-060a7f0c17d8/sv-benchmarks/c/combinations/gcd_2+newton_2_1.i[1226,1239] [2021-11-20 07:03:55,985 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_12dcefc8-044a-439a-8d92-060a7f0c17d8/sv-benchmarks/c/combinations/gcd_2+newton_2_1.i[2841,2854] [2021-11-20 07:03:55,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:03:56,013 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:03:56,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56 WrapperNode [2021-11-20 07:03:56,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:03:56,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:03:56,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:03:56,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:03:56,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,095 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-11-20 07:03:56,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:03:56,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:03:56,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:03:56,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:03:56,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:03:56,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:03:56,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:03:56,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:03:56,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (1/1) ... [2021-11-20 07:03:56,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:03:56,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:56,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:03:56,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:03:56,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:03:56,264 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-20 07:03:56,265 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-20 07:03:56,265 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-20 07:03:56,267 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-20 07:03:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:03:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:03:56,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:03:56,339 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:03:56,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:03:56,511 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:03:56,519 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:03:56,519 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:03:56,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:03:56 BoogieIcfgContainer [2021-11-20 07:03:56,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:03:56,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:03:56,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:03:56,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:03:56,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:03:55" (1/3) ... [2021-11-20 07:03:56,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@893974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:03:56, skipping insertion in model container [2021-11-20 07:03:56,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:56" (2/3) ... [2021-11-20 07:03:56,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@893974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:03:56, skipping insertion in model container [2021-11-20 07:03:56,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:03:56" (3/3) ... [2021-11-20 07:03:56,532 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_1.i [2021-11-20 07:03:56,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:03:56,539 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 07:03:56,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:03:56,608 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:03:56,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 07:03:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:03:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:03:56,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:56,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:56,640 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:56,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:56,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-11-20 07:03:56,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:56,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500090306] [2021-11-20 07:03:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:56,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:57,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:57,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500090306] [2021-11-20 07:03:57,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500090306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:57,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:57,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:03:57,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872633460] [2021-11-20 07:03:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:57,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:03:57,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:03:57,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:03:57,071 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:03:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:57,187 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-11-20 07:03:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:03:57,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 07:03:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:57,200 INFO L225 Difference]: With dead ends: 89 [2021-11-20 07:03:57,200 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 07:03:57,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:03:57,234 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:57,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 115 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:03:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 07:03:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-11-20 07:03:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:03:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-20 07:03:57,312 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-11-20 07:03:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:57,313 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-20 07:03:57,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:03:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-20 07:03:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:03:57,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:57,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:57,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:03:57,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2021-11-20 07:03:57,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:57,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664582141] [2021-11-20 07:03:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:57,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:57,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:57,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664582141] [2021-11-20 07:03:57,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664582141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:57,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:57,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:03:57,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091708398] [2021-11-20 07:03:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:57,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:03:57,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:03:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:03:57,409 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:03:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:57,460 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-20 07:03:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:03:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 07:03:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:57,463 INFO L225 Difference]: With dead ends: 36 [2021-11-20 07:03:57,463 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 07:03:57,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:03:57,470 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:57,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:03:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 07:03:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-20 07:03:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:03:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-20 07:03:57,483 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-11-20 07:03:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:57,483 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-20 07:03:57,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:03:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-20 07:03:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:03:57,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:57,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:57,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:03:57,486 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2021-11-20 07:03:57,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:57,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796016713] [2021-11-20 07:03:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:57,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:57,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:03:57,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626002620] [2021-11-20 07:03:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:57,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:57,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:57,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:03:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:03:57,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:57,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:57,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:57,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796016713] [2021-11-20 07:03:57,799 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:03:57,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626002620] [2021-11-20 07:03:57,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626002620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:57,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:57,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-20 07:03:57,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708201624] [2021-11-20 07:03:57,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:57,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:03:57,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:57,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:03:57,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:03:57,803 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:03:57,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:57,892 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-20 07:03:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:03:57,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 07:03:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:57,894 INFO L225 Difference]: With dead ends: 37 [2021-11-20 07:03:57,894 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 07:03:57,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:03:57,897 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:57,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:03:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 07:03:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 07:03:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:03:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-20 07:03:57,905 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-11-20 07:03:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:57,906 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-20 07:03:57,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:03:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-20 07:03:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:03:57,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:57,907 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:57,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:58,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:58,121 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:58,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:58,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2021-11-20 07:03:58,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:58,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387266376] [2021-11-20 07:03:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:58,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:58,134 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:03:58,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740700813] [2021-11-20 07:03:58,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:03:58,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:58,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:58,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:58,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:03:58,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:03:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 07:03:58,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:49,161 WARN L227 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 38 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:04:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:04:56,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:08,819 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (<= |c_ULTIMATE.start_main1_~y~0#1| 0) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (and (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse4 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 (mod .cse4 256))) (or (let ((.cse1 (<= 0 |ULTIMATE.start_gcd_test_~a#1|)) (.cse3 (= .cse4 0))) (and (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse0) 256) 0)) (<= .cse0 |c_ULTIMATE.start_main1_~y~0#1|) (< |ULTIMATE.start_gcd_test_~a#1| 0)) (let ((.cse2 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse4) 256))) (or .cse1 (<= .cse2 |c_ULTIMATE.start_main1_~y~0#1|) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (< 127 .cse2) .cse3 (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse2) 256) 0)))) (let ((.cse5 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse4) 256))) (or .cse1 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|) (<= .cse5 |c_ULTIMATE.start_main1_~y~0#1|) .cse3 (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse5) 256) 0)) (< 127 .cse5))))) (< 127 .cse0))))) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse6 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (or (<= (mod .cse6 256) 127) (let ((.cse7 (<= 0 |ULTIMATE.start_gcd_test_~a#1|))) (and (let ((.cse8 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse6) 256))) (or .cse7 (<= .cse8 |c_ULTIMATE.start_main1_~y~0#1|) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (< 127 .cse8) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse8) 256) 0)))) (let ((.cse9 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse6) 256))) (or .cse7 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|) (<= .cse9 |c_ULTIMATE.start_main1_~y~0#1|) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse9) 256) 0)) (< 127 .cse9)))))))))))) is different from true [2021-11-20 07:06:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-20 07:06:32,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387266376] [2021-11-20 07:06:32,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:32,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740700813] [2021-11-20 07:06:32,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740700813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:32,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:06:32,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-20 07:06:32,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082546505] [2021-11-20 07:06:32,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:32,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:06:32,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:32,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:06:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=182, Unknown=15, NotChecked=28, Total=272 [2021-11-20 07:06:32,545 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:43,566 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-11-20 07:06:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:06:43,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 07:06:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:43,568 INFO L225 Difference]: With dead ends: 38 [2021-11-20 07:06:43,568 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 07:06:43,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 61.6s TimeCoverageRelationStatistics Valid=53, Invalid=208, Unknown=15, NotChecked=30, Total=306 [2021-11-20 07:06:43,571 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:43,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2021-11-20 07:06:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 07:06:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 07:06:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:06:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-20 07:06:43,578 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 13 [2021-11-20 07:06:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:43,579 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-20 07:06:43,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:06:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-20 07:06:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:06:43,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:43,581 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:43,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 07:06:43,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:43,793 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1682229690, now seen corresponding path program 3 times [2021-11-20 07:06:43,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:43,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615318820] [2021-11-20 07:06:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:43,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:43,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:43,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583116532] [2021-11-20 07:06:43,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:06:43,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:43,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:43,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dcefc8-044a-439a-8d92-060a7f0c17d8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:06:43,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:06:43,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:43,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:06:43,935 INFO L286 TraceCheckSpWp]: Computing forward predicates...