./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_7.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_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/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_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/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_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/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 a7443921b0608d3c2ff1c61e12bf7cf129e5c1aecf22f0fb9785817b90c162e7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:33:30,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:33:30,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:33:30,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:33:30,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:33:30,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:33:30,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:33:30,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:33:30,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:33:30,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:33:30,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:33:30,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:33:30,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:33:30,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:33:30,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:33:30,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:33:30,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:33:30,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:33:30,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:33:30,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:33:30,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:33:30,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:33:30,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:33:30,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:33:30,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:33:30,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:33:30,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:33:30,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:33:30,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:33:30,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:33:30,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:33:30,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:33:30,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:33:30,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:33:30,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:33:30,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:33:30,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:33:30,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:33:30,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:33:30,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:33:30,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:33:30,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:33:30,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:33:30,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:33:30,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:33:30,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:33:30,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:33:30,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:33:30,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:33:30,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:33:30,576 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:33:30,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:33:30,578 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:33:30,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:33:30,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:33:30,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:33:30,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:33:30,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:33:30,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:33:30,579 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:33:30,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:33:30,580 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:33:30,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:33:30,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:33:30,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:33:30,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:33:30,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:33:30,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:33:30,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:33:30,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:33:30,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:33:30,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:33:30,584 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:33:30,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:33:30,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:33:30,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:33:30,585 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_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7443921b0608d3c2ff1c61e12bf7cf129e5c1aecf22f0fb9785817b90c162e7 [2021-11-20 06:33:30,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:33:30,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:33:30,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:33:30,900 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:33:30,901 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:33:30,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i [2021-11-20 06:33:30,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/data/37e494b26/c0135d8565e24580bb74a75dd0246bb6/FLAG02774ad1c [2021-11-20 06:33:31,436 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:33:31,441 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i [2021-11-20 06:33:31,452 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/data/37e494b26/c0135d8565e24580bb74a75dd0246bb6/FLAG02774ad1c [2021-11-20 06:33:31,799 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/data/37e494b26/c0135d8565e24580bb74a75dd0246bb6 [2021-11-20 06:33:31,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:33:31,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:33:31,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:33:31,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:33:31,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:33:31,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:33:31" (1/1) ... [2021-11-20 06:33:31,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39bc7b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:31, skipping insertion in model container [2021-11-20 06:33:31,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:33:31" (1/1) ... [2021-11-20 06:33:31,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:33:31,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:33:31,995 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_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[1226,1239] [2021-11-20 06:33:32,052 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_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[2841,2854] [2021-11-20 06:33:32,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:33:32,067 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:33:32,085 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_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[1226,1239] [2021-11-20 06:33:32,096 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_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[2841,2854] [2021-11-20 06:33:32,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:33:32,110 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:33:32,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32 WrapperNode [2021-11-20 06:33:32,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:33:32,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:33:32,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:33:32,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:33:32,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,150 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-11-20 06:33:32,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:33:32,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:33:32,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:33:32,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:33:32,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:33:32,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:33:32,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:33:32,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:33:32,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (1/1) ... [2021-11-20 06:33:32,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:33:32,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:32,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:33:32,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:33:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:33:32,248 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-20 06:33:32,249 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-20 06:33:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-20 06:33:32,249 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-20 06:33:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:33:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:33:32,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:33:32,312 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:33:32,313 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:33:32,491 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:33:32,498 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:33:32,498 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:33:32,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:33:32 BoogieIcfgContainer [2021-11-20 06:33:32,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:33:32,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:33:32,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:33:32,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:33:32,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:33:31" (1/3) ... [2021-11-20 06:33:32,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a88439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:33:32, skipping insertion in model container [2021-11-20 06:33:32,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:33:32" (2/3) ... [2021-11-20 06:33:32,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a88439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:33:32, skipping insertion in model container [2021-11-20 06:33:32,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:33:32" (3/3) ... [2021-11-20 06:33:32,510 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_7.i [2021-11-20 06:33:32,515 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:33:32,515 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 06:33:32,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:33:32,573 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 06:33:32,573 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:33:32,595 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 06:33:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:33:32,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:32,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:32,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-11-20 06:33:32,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:32,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138100132] [2021-11-20 06:33:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:32,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:32,877 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 06:33:32,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:32,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138100132] [2021-11-20 06:33:32,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138100132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:32,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:32,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:33:32,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780123649] [2021-11-20 06:33:32,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:32,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:33:32,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:33:32,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:33:32,918 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 06:33:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:32,971 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-11-20 06:33:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:33:32,974 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 06:33:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:32,981 INFO L225 Difference]: With dead ends: 90 [2021-11-20 06:33:32,981 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 06:33:32,984 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 06:33:32,988 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:32,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 06:33:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-11-20 06:33:33,025 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 06:33:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-20 06:33:33,028 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-11-20 06:33:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:33,029 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-20 06:33:33,029 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 06:33:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-20 06:33:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:33:33,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:33,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:33,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:33:33,032 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-11-20 06:33:33,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:33,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032734418] [2021-11-20 06:33:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:33,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:33,138 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 06:33:33,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:33,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032734418] [2021-11-20 06:33:33,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032734418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:33:33,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:33:33,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:33:33,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79907998] [2021-11-20 06:33:33,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:33:33,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:33:33,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:33:33,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:33:33,143 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:33,203 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-20 06:33:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:33:33,203 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 [2021-11-20 06:33:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:33,205 INFO L225 Difference]: With dead ends: 36 [2021-11-20 06:33:33,205 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 06:33:33,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:33:33,207 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:33,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:33:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 06:33:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-20 06:33:33,214 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 06:33:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-20 06:33:33,215 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-11-20 06:33:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:33,216 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-20 06:33:33,216 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) [2021-11-20 06:33:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-20 06:33:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:33:33,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:33,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:33,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:33:33,218 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-11-20 06:33:33,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035955834] [2021-11-20 06:33:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:33,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:33,233 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:33:33,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620793401] [2021-11-20 06:33:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:33,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:33,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:33:33,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:33:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:33:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:33:59,151 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 06:33:59,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:04,173 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 06:34:04,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:04,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035955834] [2021-11-20 06:34:04,175 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:34:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620793401] [2021-11-20 06:34:04,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620793401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:04,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:34:04,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-20 06:34:04,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436953249] [2021-11-20 06:34:04,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:04,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:34:04,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:34:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=209, Unknown=9, NotChecked=0, Total=272 [2021-11-20 06:34:04,181 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:07,083 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-20 06:34:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:34:07,084 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 [2021-11-20 06:34:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:07,085 INFO L225 Difference]: With dead ends: 42 [2021-11-20 06:34:07,085 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 06:34:07,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=74, Invalid=258, Unknown=10, NotChecked=0, Total=342 [2021-11-20 06:34:07,088 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:07,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-20 06:34:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 06:34:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-11-20 06:34:07,094 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 06:34:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-20 06:34:07,095 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-11-20 06:34:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:07,096 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-20 06:34:07,096 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) [2021-11-20 06:34:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-20 06:34:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:34:07,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:07,097 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:07,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:07,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:07,312 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-11-20 06:34:07,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:07,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909180946] [2021-11-20 06:34:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:07,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:07,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:34:07,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181207949] [2021-11-20 06:34:07,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:34:07,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:07,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:07,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:07,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:34:07,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:34:07,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:07,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:34:07,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:09,731 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 06:34:09,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:54,576 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 06:34:54,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:34:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909180946] [2021-11-20 06:34:54,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:34:54,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181207949] [2021-11-20 06:34:54,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181207949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:34:54,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:34:54,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-11-20 06:34:54,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260980575] [2021-11-20 06:34:54,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:34:54,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:34:54,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:34:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:34:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=177, Unknown=14, NotChecked=0, Total=240 [2021-11-20 06:34:54,580 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:54,740 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-20 06:34:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:34:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 06:34:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:54,743 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:34:54,743 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 06:34:54,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=49, Invalid=177, Unknown=14, NotChecked=0, Total=240 [2021-11-20 06:34:54,745 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:54,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-11-20 06:34:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 06:34:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-20 06:34:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:34:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-20 06:34:54,754 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-11-20 06:34:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:54,754 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-20 06:34:54,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-20 06:34:54,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:34:54,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:54,756 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:54,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:54,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:54,959 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-11-20 06:34:54,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:54,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283542562] [2021-11-20 06:34:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:54,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:54,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:34:54,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028314399] [2021-11-20 06:34:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:34:54,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:54,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:54,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:55,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:34:55,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:34:55,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:55,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 06:34:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:35:15,118 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:36:09,021 WARN L227 SmtUtils]: Spent 13.82s on a formula simplification. DAG size of input: 60 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:36:33,703 WARN L227 SmtUtils]: Spent 7.68s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:36:53,939 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:37:27,225 WARN L227 SmtUtils]: Spent 15.07s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:37:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:35,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:17,055 WARN L227 SmtUtils]: Spent 1.13m on a formula simplification. DAG size of input: 80 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:41:19,919 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse18 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256))) (let ((.cse27 (+ (- 256) .cse24))) (let ((.cse25 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256)) (.cse26 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256))) (let ((.cse3 (not (= (mod (mod .cse27 .cse26) 256) 0))) (.cse5 (<= .cse26 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse13 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (= .cse24 0)) (.cse10 (not (= (mod (mod .cse24 .cse25) 256) 0))) (.cse11 (<= .cse25 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse12 (or .cse4 .cse9 .cse10 .cse11)) (.cse14 (< 127 .cse24)) (.cse8 (<= .cse13 127)) (.cse1 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse7 (or .cse3 .cse4 .cse5)) (.cse0 (<= .cse24 127)) (.cse17 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse16 (mod .cse18 256))) (and (or (let ((.cse6 (= .cse18 0)) (.cse2 (let ((.cse15 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256))) (or (<= .cse15 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse15) 256) 0)) .cse17 (= 0 .cse16))))) (and (or .cse0 (and (or .cse1 (and .cse2 (or .cse3 .cse4 .cse5 .cse6))) (or (and .cse7 .cse2) .cse1 .cse8))) (or (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse6) .cse2) .cse1) (or .cse1 (and .cse12 .cse2) (< 127 .cse13))) .cse14))) (< 127 .cse16)) (or (<= .cse16 127) (let ((.cse20 (let ((.cse22 (+ (- 256) .cse16))) (let ((.cse23 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256))) (or (not (= (mod (mod .cse22 .cse23) 256) 0)) .cse17 (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (let ((.cse19 (and .cse12 .cse20))) (and (or .cse1 .cse8 .cse19) (or .cse1 .cse19))) .cse14) (or (let ((.cse21 (and .cse7 .cse20))) (and (or .cse21 .cse1 .cse8) (or .cse21 .cse1))) .cse0)))))))))))) is different from false [2021-11-20 06:41:21,930 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse18 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256))) (let ((.cse27 (+ (- 256) .cse24))) (let ((.cse25 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256)) (.cse26 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256))) (let ((.cse3 (not (= (mod (mod .cse27 .cse26) 256) 0))) (.cse5 (<= .cse26 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse13 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (= .cse24 0)) (.cse10 (not (= (mod (mod .cse24 .cse25) 256) 0))) (.cse11 (<= .cse25 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse12 (or .cse4 .cse9 .cse10 .cse11)) (.cse14 (< 127 .cse24)) (.cse8 (<= .cse13 127)) (.cse1 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse7 (or .cse3 .cse4 .cse5)) (.cse0 (<= .cse24 127)) (.cse17 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse16 (mod .cse18 256))) (and (or (let ((.cse6 (= .cse18 0)) (.cse2 (let ((.cse15 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256))) (or (<= .cse15 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse15) 256) 0)) .cse17 (= 0 .cse16))))) (and (or .cse0 (and (or .cse1 (and .cse2 (or .cse3 .cse4 .cse5 .cse6))) (or (and .cse7 .cse2) .cse1 .cse8))) (or (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse6) .cse2) .cse1) (or .cse1 (and .cse12 .cse2) (< 127 .cse13))) .cse14))) (< 127 .cse16)) (or (<= .cse16 127) (let ((.cse20 (let ((.cse22 (+ (- 256) .cse16))) (let ((.cse23 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256))) (or (not (= (mod (mod .cse22 .cse23) 256) 0)) .cse17 (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (let ((.cse19 (and .cse12 .cse20))) (and (or .cse1 .cse8 .cse19) (or .cse1 .cse19))) .cse14) (or (let ((.cse21 (and .cse7 .cse20))) (and (or .cse21 .cse1 .cse8) (or .cse21 .cse1))) .cse0)))))))))))) is different from true [2021-11-20 06:42:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-20 06:42:33,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283542562] [2021-11-20 06:42:33,400 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028314399] [2021-11-20 06:42:33,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028314399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:33,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:33,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-20 06:42:33,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53217551] [2021-11-20 06:42:33,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:33,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:42:33,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:42:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=259, Unknown=40, NotChecked=36, Total=420 [2021-11-20 06:42:33,403 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:39,626 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-20 06:42:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:42:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 06:42:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:39,628 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:42:39,628 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 06:42:39,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 257.9s TimeCoverageRelationStatistics Valid=96, Invalid=288, Unknown=40, NotChecked=38, Total=462 [2021-11-20 06:42:39,630 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:39,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 220 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2021-11-20 06:42:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 06:42:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-20 06:42:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:42:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-20 06:42:39,639 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 14 [2021-11-20 06:42:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:39,640 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-20 06:42:39,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-20 06:42:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:42:39,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:39,642 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:39,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:39,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:39,855 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1911673028, now seen corresponding path program 1 times [2021-11-20 06:42:39,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:39,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722828847] [2021-11-20 06:42:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:39,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:39,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:42:39,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018218554] [2021-11-20 06:42:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:39,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:42:39,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:39,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:42:39,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16b42f41-a346-45bc-8771-4f5b4cb6e7c0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:42:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:42:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:05,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:27,281 WARN L227 SmtUtils]: Spent 57.31s on a formula simplification. DAG size of input: 75 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)