./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/gcd02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/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_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/gcd02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:50:54,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:50:54,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:50:54,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:50:54,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:50:54,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:50:54,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:50:54,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:50:54,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:50:54,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:50:54,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:50:54,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:50:54,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:50:54,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:50:54,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:50:54,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:50:54,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:50:54,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:50:54,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:50:54,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:50:54,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:50:54,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:50:54,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:50:54,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:50:54,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:50:54,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:50:54,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:50:54,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:50:54,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:50:54,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:50:54,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:50:54,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:50:54,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:50:54,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:50:54,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:50:54,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:50:54,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:50:54,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:50:54,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:50:54,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:50:54,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:50:54,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-11-20 05:50:54,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:50:54,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:50:54,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:50:54,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:50:54,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:50:54,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:50:54,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:50:54,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:50:54,547 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:50:54,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:50:54,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:50:54,548 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:50:54,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:50:54,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:50:54,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:50:54,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:50:54,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:50:54,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:50:54,550 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-20 05:50:54,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:50:54,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:50:54,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:50:54,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:50:54,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:50:54,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:50:54,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:50:54,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:50:54,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:50:54,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:50:54,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:50:54,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:50:54,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:50:54,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:50:54,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:50:54,553 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_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2021-11-20 05:50:54,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:50:54,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:50:54,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:50:54,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:50:54,916 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:50:54,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/recursive/gcd02.c [2021-11-20 05:50:55,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/data/95253c88f/b40f7c67dd2a4d15a7d3f57e497bc8b7/FLAG939b16d05 [2021-11-20 05:50:55,501 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:50:55,502 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/sv-benchmarks/c/recursive/gcd02.c [2021-11-20 05:50:55,517 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/data/95253c88f/b40f7c67dd2a4d15a7d3f57e497bc8b7/FLAG939b16d05 [2021-11-20 05:50:55,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/data/95253c88f/b40f7c67dd2a4d15a7d3f57e497bc8b7 [2021-11-20 05:50:55,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:50:55,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:50:55,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:50:55,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:50:55,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:50:55,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:50:55" (1/1) ... [2021-11-20 05:50:55,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4fac8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:55, skipping insertion in model container [2021-11-20 05:50:55,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:50:55" (1/1) ... [2021-11-20 05:50:55,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:50:55,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:50:56,150 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_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/sv-benchmarks/c/recursive/gcd02.c[623,636] [2021-11-20 05:50:56,171 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_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2021-11-20 05:50:56,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:50:56,183 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:50:56,201 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_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/sv-benchmarks/c/recursive/gcd02.c[623,636] [2021-11-20 05:50:56,220 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_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2021-11-20 05:50:56,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:50:56,237 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:50:56,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56 WrapperNode [2021-11-20 05:50:56,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:50:56,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:50:56,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:50:56,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:50:56,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,280 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2021-11-20 05:50:56,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:50:56,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:50:56,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:50:56,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:50:56,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:50:56,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:50:56,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:50:56,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:50:56,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (1/1) ... [2021-11-20 05:50:56,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:50:56,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:56,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:50:56,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:50:56,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:50:56,429 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-11-20 05:50:56,429 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-11-20 05:50:56,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:50:56,429 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2021-11-20 05:50:56,429 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2021-11-20 05:50:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:50:56,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:50:56,499 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:50:56,501 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:50:56,690 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:50:56,697 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:50:56,697 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 05:50:56,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:50:56 BoogieIcfgContainer [2021-11-20 05:50:56,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:50:56,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:50:56,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:50:56,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:50:56,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:50:55" (1/3) ... [2021-11-20 05:50:56,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5888e6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:50:56, skipping insertion in model container [2021-11-20 05:50:56,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:56" (2/3) ... [2021-11-20 05:50:56,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5888e6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:50:56, skipping insertion in model container [2021-11-20 05:50:56,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:50:56" (3/3) ... [2021-11-20 05:50:56,709 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2021-11-20 05:50:56,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:50:56,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-20 05:50:56,769 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:50:56,785 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=FINITE_AUTOMATA, 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 05:50:56,785 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-20 05:50:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 30 states have (on average 1.5) internal successors, (45), 36 states have internal predecessors, (45), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 05:50:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:50:56,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:56,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:56,827 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:50:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:56,834 INFO L85 PathProgramCache]: Analyzing trace with hash -23952042, now seen corresponding path program 1 times [2021-11-20 05:50:56,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:56,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164881630] [2021-11-20 05:50:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:56,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:57,153 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 05:50:57,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:57,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164881630] [2021-11-20 05:50:57,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164881630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:57,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:50:57,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:50:57,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987235500] [2021-11-20 05:50:57,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:57,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:50:57,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:50:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:50:57,222 INFO L87 Difference]: Start difference. First operand has 44 states, 30 states have (on average 1.5) internal successors, (45), 36 states have internal predecessors, (45), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:57,406 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2021-11-20 05:50:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:50:57,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:50:57,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:57,419 INFO L225 Difference]: With dead ends: 83 [2021-11-20 05:50:57,419 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 05:50:57,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:50:57,432 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:57,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 138 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:50:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 05:50:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-20 05:50:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 26 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:50:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-20 05:50:57,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2021-11-20 05:50:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:57,497 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-20 05:50:57,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-20 05:50:57,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:50:57,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:57,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:57,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:50:57,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:50:57,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash -23952266, now seen corresponding path program 1 times [2021-11-20 05:50:57,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:57,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714956475] [2021-11-20 05:50:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:57,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:57,578 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 05:50:57,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:57,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714956475] [2021-11-20 05:50:57,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714956475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:57,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:50:57,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:50:57,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030697171] [2021-11-20 05:50:57,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:57,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:50:57,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:50:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:50:57,610 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:57,707 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-20 05:50:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:50:57,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:50:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:57,710 INFO L225 Difference]: With dead ends: 32 [2021-11-20 05:50:57,710 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 05:50:57,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:50:57,713 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:57,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 74 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:50:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 05:50:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-20 05:50:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:50:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-20 05:50:57,722 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2021-11-20 05:50:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:57,723 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-20 05:50:57,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:50:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-20 05:50:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:50:57,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:57,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:57,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:50:57,726 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:50:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:57,727 INFO L85 PathProgramCache]: Analyzing trace with hash 346469594, now seen corresponding path program 1 times [2021-11-20 05:50:57,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:57,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609307199] [2021-11-20 05:50:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:57,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:57,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:50:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:57,936 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 05:50:57,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609307199] [2021-11-20 05:50:57,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609307199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:57,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:50:57,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:50:57,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332879848] [2021-11-20 05:50:57,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:57,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:50:57,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:50:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:50:57,940 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:50:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:58,144 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-20 05:50:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:50:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-20 05:50:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:58,153 INFO L225 Difference]: With dead ends: 42 [2021-11-20 05:50:58,153 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 05:50:58,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:50:58,162 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:58,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 75 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:50:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 05:50:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-20 05:50:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 05:50:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-20 05:50:58,189 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 17 [2021-11-20 05:50:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:58,190 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-20 05:50:58,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:50:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-20 05:50:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:50:58,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:58,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:58,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:50:58,193 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:50:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2144344432, now seen corresponding path program 1 times [2021-11-20 05:50:58,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358229370] [2021-11-20 05:50:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:58,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:58,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:50:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:58,252 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 05:50:58,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:58,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358229370] [2021-11-20 05:50:58,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358229370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:58,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:50:58,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:50:58,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147864965] [2021-11-20 05:50:58,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:58,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:50:58,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:50:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:50:58,256 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:50:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:58,278 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-11-20 05:50:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:50:58,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-20 05:50:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:58,282 INFO L225 Difference]: With dead ends: 38 [2021-11-20 05:50:58,282 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 05:50:58,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:50:58,284 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:58,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:50:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 05:50:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 05:50:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 05:50:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-20 05:50:58,310 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 18 [2021-11-20 05:50:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:58,311 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-20 05:50:58,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:50:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-20 05:50:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:50:58,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:58,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:58,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:50:58,313 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:50:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1147675421, now seen corresponding path program 1 times [2021-11-20 05:50:58,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:58,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820881940] [2021-11-20 05:50:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:58,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:58,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:50:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:58,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:58,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820881940] [2021-11-20 05:50:58,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820881940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:58,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248488304] [2021-11-20 05:50:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:58,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:58,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:58,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:58,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:50:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:58,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:50:58,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:50:59,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:50:59,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248488304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:59,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:50:59,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2021-11-20 05:50:59,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786226027] [2021-11-20 05:50:59,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:59,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:50:59,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:59,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:50:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:50:59,011 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:50:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:59,216 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-11-20 05:50:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:50:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-20 05:50:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:59,218 INFO L225 Difference]: With dead ends: 46 [2021-11-20 05:50:59,219 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 05:50:59,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:50:59,221 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:59,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 131 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:50:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 05:50:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 05:50:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:50:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-20 05:50:59,232 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-11-20 05:50:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:59,233 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-20 05:50:59,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:50:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-20 05:50:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:50:59,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:59,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:59,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 05:50:59,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:59,436 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:50:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash 207304407, now seen corresponding path program 1 times [2021-11-20 05:50:59,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:59,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604733861] [2021-11-20 05:50:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:59,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:59,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:50:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:50:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:50:59,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604733861] [2021-11-20 05:50:59,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604733861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:59,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:50:59,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:50:59,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026645622] [2021-11-20 05:50:59,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:59,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:50:59,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:50:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:50:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:50:59,562 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:50:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:59,714 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-20 05:50:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:50:59,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 05:50:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:59,716 INFO L225 Difference]: With dead ends: 43 [2021-11-20 05:50:59,717 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 05:50:59,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:50:59,718 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:59,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 78 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:50:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 05:50:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-20 05:50:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 05:50:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-11-20 05:50:59,728 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2021-11-20 05:50:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:59,728 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-11-20 05:50:59,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:50:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-11-20 05:50:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:50:59,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:59,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:59,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:50:59,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:50:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:59,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1567415017, now seen corresponding path program 1 times [2021-11-20 05:50:59,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:50:59,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785175081] [2021-11-20 05:50:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:59,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:50:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:50:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:59,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:50:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:50:59,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:50:59,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785175081] [2021-11-20 05:50:59,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785175081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:50:59,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113227778] [2021-11-20 05:50:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:59,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:50:59,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:50:59,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:50:59,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:50:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:50:59,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:51:00,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:51:00,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113227778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:51:00,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:51:00,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2021-11-20 05:51:00,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107697477] [2021-11-20 05:51:00,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:51:00,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:51:00,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:51:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:51:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:51:00,186 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:51:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:00,320 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-11-20 05:51:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:51:00,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 05:51:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:00,322 INFO L225 Difference]: With dead ends: 52 [2021-11-20 05:51:00,322 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 05:51:00,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:51:00,324 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:00,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 100 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:51:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 05:51:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-20 05:51:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 05:51:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-11-20 05:51:00,332 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2021-11-20 05:51:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:00,333 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-11-20 05:51:00,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:51:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-11-20 05:51:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:51:00,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:00,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:00,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:00,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:51:00,550 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:51:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1739599136, now seen corresponding path program 1 times [2021-11-20 05:51:00,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:00,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170690531] [2021-11-20 05:51:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:00,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:00,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:51:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:00,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:51:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:51:00,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170690531] [2021-11-20 05:51:00,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170690531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485373951] [2021-11-20 05:51:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:00,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:00,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:00,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:00,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:51:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:51:00,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:51:01,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:51:01,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485373951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:51:01,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:51:01,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 21 [2021-11-20 05:51:01,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501580058] [2021-11-20 05:51:01,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:51:01,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:51:01,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:51:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:51:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:51:01,213 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:51:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:01,420 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-11-20 05:51:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:51:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-20 05:51:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:01,424 INFO L225 Difference]: With dead ends: 52 [2021-11-20 05:51:01,424 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 05:51:01,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:51:01,426 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:01,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 141 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:51:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 05:51:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 05:51:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 05:51:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-20 05:51:01,443 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 33 [2021-11-20 05:51:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:01,444 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-20 05:51:01,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:51:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-20 05:51:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:51:01,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:01,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:01,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:01,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 05:51:01,650 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-20 05:51:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash -378656390, now seen corresponding path program 1 times [2021-11-20 05:51:01,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:51:01,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120481400] [2021-11-20 05:51:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:01,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:51:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:01,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 05:51:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:01,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:51:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:01,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 05:51:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:51:01,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:51:01,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120481400] [2021-11-20 05:51:01,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120481400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:51:01,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754523467] [2021-11-20 05:51:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:01,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:51:01,842 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:51:01,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:51:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:51:01,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:51:02,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:51:02,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754523467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:51:02,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:51:02,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 21 [2021-11-20 05:51:02,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660225743] [2021-11-20 05:51:02,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:51:02,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:51:02,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:51:02,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:51:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:51:02,171 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:51:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:02,307 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-11-20 05:51:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:51:02,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-11-20 05:51:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:02,308 INFO L225 Difference]: With dead ends: 37 [2021-11-20 05:51:02,308 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 05:51:02,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:51:02,310 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:02,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 95 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:51:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 05:51:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 05:51:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 05:51:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 05:51:02,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2021-11-20 05:51:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:02,312 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 05:51:02,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:51:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 05:51:02,313 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 05:51:02,316 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2021-11-20 05:51:02,316 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2021-11-20 05:51:02,317 INFO L764 garLoopResultBuilder]: Registering result SAFE for location gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2021-11-20 05:51:02,317 INFO L764 garLoopResultBuilder]: Registering result SAFE for location gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2021-11-20 05:51:02,317 INFO L764 garLoopResultBuilder]: Registering result SAFE for location gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2021-11-20 05:51:02,317 INFO L764 garLoopResultBuilder]: Registering result SAFE for location gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2021-11-20 05:51:02,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 05:51:02,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:51:02,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 05:51:02,685 INFO L858 garLoopResultBuilder]: For program point L33(lines 33 35) no Hoare annotation was computed. [2021-11-20 05:51:02,685 INFO L858 garLoopResultBuilder]: For program point dividesFINAL(lines 32 40) no Hoare annotation was computed. [2021-11-20 05:51:02,686 INFO L858 garLoopResultBuilder]: For program point dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 39) no Hoare annotation was computed. [2021-11-20 05:51:02,686 INFO L858 garLoopResultBuilder]: For program point dividesEXIT(lines 32 40) no Hoare annotation was computed. [2021-11-20 05:51:02,686 INFO L858 garLoopResultBuilder]: For program point dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 39) no Hoare annotation was computed. [2021-11-20 05:51:02,686 INFO L858 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2021-11-20 05:51:02,686 INFO L858 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-11-20 05:51:02,686 INFO L854 garLoopResultBuilder]: At program point L39-2(line 39) the Hoare annotation is: (let ((.cse0 (not (< 0 |divides_#in~n|)))) (and (or (not (< |divides_#in~m| 2147483647)) (< divides_~m 2147483647) .cse0) (or (not (<= |divides_#in~m| 2147483647)) .cse0 (and (<= divides_~m 2147483647) (< 0 divides_~n) (<= divides_~n divides_~m))))) [2021-11-20 05:51:02,686 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-11-20 05:51:02,687 INFO L858 garLoopResultBuilder]: For program point L39-3(line 39) no Hoare annotation was computed. [2021-11-20 05:51:02,687 INFO L861 garLoopResultBuilder]: At program point dividesENTRY(lines 32 40) the Hoare annotation is: true [2021-11-20 05:51:02,687 INFO L858 garLoopResultBuilder]: For program point gcdEXIT(lines 17 29) no Hoare annotation was computed. [2021-11-20 05:51:02,687 INFO L858 garLoopResultBuilder]: For program point L25(lines 25 27) no Hoare annotation was computed. [2021-11-20 05:51:02,687 INFO L858 garLoopResultBuilder]: For program point gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2021-11-20 05:51:02,687 INFO L858 garLoopResultBuilder]: For program point gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2021-11-20 05:51:02,687 INFO L858 garLoopResultBuilder]: For program point gcdFINAL(lines 17 29) no Hoare annotation was computed. [2021-11-20 05:51:02,687 INFO L858 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-11-20 05:51:02,688 INFO L858 garLoopResultBuilder]: For program point L28-1(line 28) no Hoare annotation was computed. [2021-11-20 05:51:02,688 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-11-20 05:51:02,688 INFO L854 garLoopResultBuilder]: At program point L28-2(line 28) the Hoare annotation is: (or (not (<= |gcd_#in~y2| 2147483647)) (and (< 0 gcd_~y1) (<= gcd_~y1 (+ gcd_~y2 2147483646)) (= gcd_~y1 |gcd_#in~y1|) (<= gcd_~y2 2147483647)) (not (<= |gcd_#in~y1| 2147483647))) [2021-11-20 05:51:02,688 INFO L858 garLoopResultBuilder]: For program point gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2021-11-20 05:51:02,688 INFO L858 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-11-20 05:51:02,688 INFO L858 garLoopResultBuilder]: For program point L28-3(line 28) no Hoare annotation was computed. [2021-11-20 05:51:02,688 INFO L854 garLoopResultBuilder]: At program point L26-2(line 26) the Hoare annotation is: (or (not (<= |gcd_#in~y2| 2147483647)) (and (< 0 gcd_~y1) (<= gcd_~y1 (+ gcd_~y2 2147483646)) (= gcd_~y1 |gcd_#in~y1|) (<= gcd_~y2 2147483647)) (not (<= |gcd_#in~y1| 2147483647))) [2021-11-20 05:51:02,688 INFO L861 garLoopResultBuilder]: At program point gcdENTRY(lines 17 29) the Hoare annotation is: true [2021-11-20 05:51:02,688 INFO L858 garLoopResultBuilder]: For program point L26-3(line 26) no Hoare annotation was computed. [2021-11-20 05:51:02,689 INFO L858 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2021-11-20 05:51:02,689 INFO L858 garLoopResultBuilder]: For program point gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2021-11-20 05:51:02,689 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 21) no Hoare annotation was computed. [2021-11-20 05:51:02,689 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 29) no Hoare annotation was computed. [2021-11-20 05:51:02,689 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 05:51:02,689 INFO L858 garLoopResultBuilder]: For program point L54(line 54) no Hoare annotation was computed. [2021-11-20 05:51:02,689 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_main_~m~0#1| 2147483647)) [2021-11-20 05:51:02,689 INFO L858 garLoopResultBuilder]: For program point L52-1(line 52) no Hoare annotation was computed. [2021-11-20 05:51:02,690 INFO L858 garLoopResultBuilder]: For program point L48(lines 48 50) no Hoare annotation was computed. [2021-11-20 05:51:02,690 INFO L858 garLoopResultBuilder]: For program point L44(lines 44 46) no Hoare annotation was computed. [2021-11-20 05:51:02,690 INFO L861 garLoopResultBuilder]: At program point L42(lines 42 59) the Hoare annotation is: true [2021-11-20 05:51:02,690 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-20 05:51:02,690 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 05:51:02,690 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-20 05:51:02,690 INFO L854 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (< 0 |ULTIMATE.start_main_~z~0#1|) (<= |ULTIMATE.start_main_~m~0#1| 2147483647)) [2021-11-20 05:51:02,690 INFO L858 garLoopResultBuilder]: For program point L53-1(line 53) no Hoare annotation was computed. [2021-11-20 05:51:02,690 INFO L858 garLoopResultBuilder]: For program point L51(lines 51 58) no Hoare annotation was computed. [2021-11-20 05:51:02,691 INFO L858 garLoopResultBuilder]: For program point L53-2(lines 53 57) no Hoare annotation was computed. [2021-11-20 05:51:02,694 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:51:02,695 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 05:51:02,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:51:02 BoogieIcfgContainer [2021-11-20 05:51:02,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 05:51:02,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 05:51:02,705 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 05:51:02,705 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 05:51:02,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:50:56" (3/4) ... [2021-11-20 05:51:02,708 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 05:51:02,714 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure divides [2021-11-20 05:51:02,715 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2021-11-20 05:51:02,720 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-20 05:51:02,720 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-20 05:51:02,720 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 05:51:02,721 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 05:51:02,755 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 05:51:02,755 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 05:51:02,756 INFO L158 Benchmark]: Toolchain (without parser) took 6890.78ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 83.2MB in the beginning and 99.4MB in the end (delta: -16.2MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-20 05:51:02,756 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory was 90.2MB in the beginning and 90.2MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:51:02,756 INFO L158 Benchmark]: CACSL2BoogieTranslator took 371.40ms. Allocated memory is still 117.4MB. Free memory was 82.9MB in the beginning and 93.5MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:51:02,757 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.93ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 92.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:51:02,757 INFO L158 Benchmark]: Boogie Preprocessor took 52.32ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 91.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:51:02,757 INFO L158 Benchmark]: RCFGBuilder took 364.68ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 79.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 05:51:02,758 INFO L158 Benchmark]: TraceAbstraction took 6002.33ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 79.6MB in the beginning and 101.6MB in the end (delta: -22.0MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-11-20 05:51:02,758 INFO L158 Benchmark]: Witness Printer took 50.47ms. Allocated memory is still 142.6MB. Free memory was 101.6MB in the beginning and 99.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:51:02,760 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory was 90.2MB in the beginning and 90.2MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 371.40ms. Allocated memory is still 117.4MB. Free memory was 82.9MB in the beginning and 93.5MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.93ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 92.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.32ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 91.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 364.68ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 79.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6002.33ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 79.6MB in the beginning and 101.6MB in the end (delta: -22.0MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Witness Printer took 50.47ms. Allocated memory is still 142.6MB. Free memory was 101.6MB in the beginning and 99.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 39]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 39]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 5.9s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 241 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 209 mSDsluCounter, 889 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 713 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1079 IncrementalHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 176 mSDtfsCounter, 1079 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 230 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 42 PreInvPairs, 52 NumberOfFragments, 100 HoareAnnotationTreeSize, 42 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 311 ConstructedInterpolants, 0 QuantifiedInterpolants, 1191 SizeOfPredicates, 16 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 57/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-20 05:51:02,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c1e5a0-b20e-4b37-a0cc-32b1653c8bee/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE