./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/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_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:45:19,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:45:19,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:45:19,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:45:19,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:45:19,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:45:19,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:45:19,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:45:19,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:45:19,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:45:19,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:45:19,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:45:19,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:45:19,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:45:19,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:45:19,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:45:19,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:45:19,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:45:19,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:45:19,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:45:19,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:45:19,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:45:19,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:45:19,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:45:19,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:45:19,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:45:19,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:45:19,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:45:19,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:45:19,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:45:19,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:45:19,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:45:19,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:45:19,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:45:19,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:45:19,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:45:19,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:45:19,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:45:19,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:45:19,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:45:19,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:45:19,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:45:19,612 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:45:19,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:45:19,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:45:19,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:45:19,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:45:19,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:45:19,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:45:19,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:45:19,621 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:45:19,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:45:19,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:45:19,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:45:19,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:45:19,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:45:19,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:45:19,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:45:19,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:45:19,624 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:45:19,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:45:19,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:45:19,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:45:19,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:45:19,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:45:19,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:45:19,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:45:19,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:45:19,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:45:19,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:45:19,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:45:19,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:45:19,628 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:45:19,628 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:45:19,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:45:19,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:45:19,629 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_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde [2021-11-20 06:45:19,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:45:19,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:45:19,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:45:19,908 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:45:19,909 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:45:19,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/bitvector/gcd_1.c [2021-11-20 06:45:19,991 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/data/327416fb8/3c7fb9e09796419fbf6469340e52c624/FLAGfd18c2e2c [2021-11-20 06:45:20,535 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:45:20,535 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/sv-benchmarks/c/bitvector/gcd_1.c [2021-11-20 06:45:20,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/data/327416fb8/3c7fb9e09796419fbf6469340e52c624/FLAGfd18c2e2c [2021-11-20 06:45:20,916 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/data/327416fb8/3c7fb9e09796419fbf6469340e52c624 [2021-11-20 06:45:20,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:45:20,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:45:20,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:45:20,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:45:20,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:45:20,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:45:20" (1/1) ... [2021-11-20 06:45:20,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20461bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:20, skipping insertion in model container [2021-11-20 06:45:20,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:45:20" (1/1) ... [2021-11-20 06:45:20,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:45:20,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:45:21,122 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_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2021-11-20 06:45:21,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:45:21,143 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:45:21,154 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_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2021-11-20 06:45:21,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:45:21,172 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:45:21,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21 WrapperNode [2021-11-20 06:45:21,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:45:21,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:45:21,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:45:21,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:45:21,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,205 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 47 [2021-11-20 06:45:21,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:45:21,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:45:21,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:45:21,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:45:21,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:45:21,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:45:21,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:45:21,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:45:21,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (1/1) ... [2021-11-20 06:45:21,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:45:21,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:45:21,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:45:21,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:45:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:45:21,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:45:21,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:45:21,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:45:21,395 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:45:21,397 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:45:21,533 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:45:21,539 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:45:21,539 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:45:21,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:45:21 BoogieIcfgContainer [2021-11-20 06:45:21,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:45:21,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:45:21,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:45:21,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:45:21,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:45:20" (1/3) ... [2021-11-20 06:45:21,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124f6a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:45:21, skipping insertion in model container [2021-11-20 06:45:21,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:45:21" (2/3) ... [2021-11-20 06:45:21,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124f6a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:45:21, skipping insertion in model container [2021-11-20 06:45:21,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:45:21" (3/3) ... [2021-11-20 06:45:21,549 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1.c [2021-11-20 06:45:21,554 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:45:21,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:45:21,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:45:21,610 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:45:21,611 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:45:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:45:21,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:21,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:21,632 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:21,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2002478831, now seen corresponding path program 1 times [2021-11-20 06:45:21,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:21,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117937949] [2021-11-20 06:45:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:21,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:21,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:45:21,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868716761] [2021-11-20 06:45:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:21,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:45:21,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:45:21,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:45:21,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:45:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:21,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:45:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:45:21,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:45:21,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:21,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117937949] [2021-11-20 06:45:21,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:45:21,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868716761] [2021-11-20 06:45:21,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868716761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:21,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:21,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:45:21,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681740367] [2021-11-20 06:45:21,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:21,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:45:21,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:21,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:45:21,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:45:21,940 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:21,970 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2021-11-20 06:45:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:45:21,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:45:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:21,980 INFO L225 Difference]: With dead ends: 28 [2021-11-20 06:45:21,980 INFO L226 Difference]: Without dead ends: 12 [2021-11-20 06:45:21,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 06:45:21,988 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:21,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:45:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-20 06:45:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-20 06:45:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-20 06:45:22,022 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-11-20 06:45:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:22,023 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-20 06:45:22,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-20 06:45:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:45:22,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:22,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:22,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:45:22,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 06:45:22,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1895646932, now seen corresponding path program 1 times [2021-11-20 06:45:22,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744285088] [2021-11-20 06:45:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:22,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:22,254 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:45:22,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59791181] [2021-11-20 06:45:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:22,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:45:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:45:22,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:45:22,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:45:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:22,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:45:22,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:45:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:45:22,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:45:22,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:22,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744285088] [2021-11-20 06:45:22,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:45:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59791181] [2021-11-20 06:45:22,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59791181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:45:22,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:45:22,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-20 06:45:22,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024227206] [2021-11-20 06:45:22,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:45:22,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:45:22,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:45:22,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:45:22,515 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:22,594 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-20 06:45:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:45:22,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:45:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:22,596 INFO L225 Difference]: With dead ends: 18 [2021-11-20 06:45:22,596 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 06:45:22,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 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 06:45:22,598 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:22,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:45:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 06:45:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-20 06:45:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-20 06:45:22,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-20 06:45:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:22,603 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-20 06:45:22,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:45:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-20 06:45:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:45:22,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:22,605 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:45:22,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:45:22,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 06:45:22,831 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:22,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1416141937, now seen corresponding path program 2 times [2021-11-20 06:45:22,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:22,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958971097] [2021-11-20 06:45:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:22,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:22,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:45:22,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859771309] [2021-11-20 06:45:22,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:45:22,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:45:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:45:22,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:45:22,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:45:32,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:45:32,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:45:32,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 06:45:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:46:28,903 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main_~y~0#1|) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main_~y~0#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |c_ULTIMATE.start_main_~y~0#1|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-20 06:46:39,686 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main_~y~0#1|) (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main_~y~0#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |c_ULTIMATE.start_main_~y~0#1|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-20 06:46:59,976 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |c_ULTIMATE.start_main_~y~0#1|) 256))) (and (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_#res#1| .cse0) (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| .cse0) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (< 0 |c_ULTIMATE.start_main_~y~0#1|) (<= |c_ULTIMATE.start_main_~y~0#1| 127)) is different from false [2021-11-20 06:48:18,749 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |ULTIMATE.start_main_~y~0#1|) 256))) (and (< 0 |ULTIMATE.start_main_~y~0#1|) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |ULTIMATE.start_main_~y~0#1|) 0) (= (mod (mod |ULTIMATE.start_main_~y~0#1| .cse0) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (<= 0 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|)) is different from false [2021-11-20 06:49:02,706 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |ULTIMATE.start_main_~y~0#1|) 256))) (and (< 0 |ULTIMATE.start_main_~y~0#1|) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |ULTIMATE.start_main_~y~0#1|) 0) (= (mod (mod |ULTIMATE.start_main_~y~0#1| .cse0) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-20 06:49:04,711 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |ULTIMATE.start_main_~y~0#1|) 256))) (and (< 0 |ULTIMATE.start_main_~y~0#1|) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |ULTIMATE.start_main_~y~0#1|) 0) (= (mod (mod |ULTIMATE.start_main_~y~0#1| .cse0) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true [2021-11-20 06:49:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-20 06:49:04,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:19,911 WARN L227 SmtUtils]: Spent 1.62m on a formula simplification. DAG size of input: 122 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:51:46,828 WARN L227 SmtUtils]: Spent 16.10s on a formula simplification. DAG size of input: 70 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:52:05,931 WARN L227 SmtUtils]: Spent 9.00s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:52:26,532 WARN L860 $PredicateComparison]: unable to prove that (or (<= 0 |c_ULTIMATE.start_main_~x~0#1|) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|) 0)) (<= |c_ULTIMATE.start_main_~y~0#1| 0) (let ((.cse1 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (+ .cse1 (- 256)) |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| (+ (- 256) (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| 255) .cse0) 256))) 256) 0)) (= .cse0 0) (<= .cse1 127))) (let ((.cse2 (mod (mod .cse1 |c_ULTIMATE.start_main_~y~0#1|) 256))) (or (= .cse2 0) (not (= (mod (mod |c_ULTIMATE.start_main_~y~0#1| .cse2) 256) 0)) (< 127 .cse1)))))) is different from true [2021-11-20 06:52:45,942 WARN L227 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 7 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:53:53,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_5| Int) (|v_ULTIMATE.start_main_~y~0#1_6| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= (mod (mod |v_ULTIMATE.start_main_~y~0#1_6| .cse0) 256) 0)) (<= |v_ULTIMATE.start_main_~y~0#1_6| 0) (< (+ |v_ULTIMATE.start_main_~x~0#1_5| 128) 0) (<= 0 |v_ULTIMATE.start_main_~x~0#1_5|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_5| |v_ULTIMATE.start_main_~y~0#1_6|) 0))))) is different from false [2021-11-20 06:53:55,903 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_5| Int) (|v_ULTIMATE.start_main_~y~0#1_6| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= (mod (mod |v_ULTIMATE.start_main_~y~0#1_6| .cse0) 256) 0)) (<= |v_ULTIMATE.start_main_~y~0#1_6| 0) (< (+ |v_ULTIMATE.start_main_~x~0#1_5| 128) 0) (<= 0 |v_ULTIMATE.start_main_~x~0#1_5|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_5| |v_ULTIMATE.start_main_~y~0#1_6|) 0))))) is different from true [2021-11-20 06:53:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:55,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:55,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958971097] [2021-11-20 06:53:55,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:53:55,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859771309] [2021-11-20 06:53:55,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859771309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:53:55,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:53:55,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2021-11-20 06:53:55,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212509587] [2021-11-20 06:53:55,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:55,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:53:55,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:53:55,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=143, Unknown=16, NotChecked=210, Total=420 [2021-11-20 06:53:55,908 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:48,268 WARN L227 SmtUtils]: Spent 46.32s on a formula simplification. DAG size of input: 44 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:54:50,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:54:52,103 WARN L838 $PredicateComparison]: unable to prove that (and (or (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse1 (+ 256 |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (and (or (let ((.cse0 (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (and (or (= .cse0 0) (= .cse0 |c_ULTIMATE.start_main_~y~0#1|) (< 127 .cse0) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse0) 256) 0))) (or (<= .cse0 127) (= .cse0 .cse1)))) (< 127 .cse2)) (or (<= .cse2 127) (let ((.cse4 (mod (+ (- 256) .cse2) |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse3 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse4) 256))) (and (or (< 127 .cse3) (= .cse3 0) (= .cse3 |c_ULTIMATE.start_main_~y~0#1|)) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse3)) 256) 0)) (<= .cse3 127) (= .cse4 0) (= .cse3 .cse1))))))))) (< 0 |c_ULTIMATE.start_main_~y~0#1|) (<= |c_ULTIMATE.start_main_~x~0#1| 127) (= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main_~y~0#1|) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ |c_ULTIMATE.start_main_~x~0#1| 128)) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main_~y~0#1|) 0)) is different from false [2021-11-20 06:56:08,324 WARN L227 SmtUtils]: Spent 1.11m on a formula simplification. DAG size of input: 89 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:56:10,332 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse34 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256))) (let ((.cse33 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256)) (.cse29 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse34) 256) 0))) (.cse11 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse30 (= .cse34 0)) (.cse31 (= .cse34 |c_ULTIMATE.start_main_~y~0#1|)) (.cse21 (+ 256 |c_ULTIMATE.start_main_~y~0#1|))) (let ((.cse9 (<= .cse34 127)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse34)) 256) 0))) (.cse13 (= .cse34 .cse21)) (.cse8 (or .cse29 .cse11 .cse30 .cse31)) (.cse3 (< 127 .cse33)) (.cse4 (<= .cse33 127)) (.cse6 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse0 (< 127 .cse34)) (.cse18 (= .cse33 .cse21)) (.cse19 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse33)) 256)))) (.cse17 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse14 (= |c_ULTIMATE.start_main_~y~0#1| .cse33)) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse33) 256) 0))) (.cse16 (= .cse33 0)) (.cse20 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse22 (mod .cse32 256))) (and (< 0 |c_ULTIMATE.start_main_~y~0#1|) (or (let ((.cse7 (or .cse20 (= .cse21 .cse22) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse22)) 256) 0))))) (let ((.cse5 (or (and (or .cse11 .cse18 .cse19) .cse7) .cse17)) (.cse1 (or (and .cse7 (or .cse11 .cse14 .cse15 .cse16)) .cse17))) (and (or .cse0 (let ((.cse2 (or .cse6 (and .cse7 .cse8)))) (and (or (and .cse1 .cse2) .cse3) (or .cse4 (and .cse5 .cse2))))) (or .cse9 (let ((.cse10 (or .cse6 (and .cse7 (or .cse11 .cse12 .cse13))))) (and (or .cse4 (and .cse10 .cse5)) (or (and .cse10 .cse1) .cse3))))))) (<= .cse22 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main_~y~0#1|) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main_~y~0#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (let ((.cse23 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| .cse23) (<= .cse23 127)) (and (< 127 .cse23) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse23)))) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (or (< 127 .cse22) (let ((.cse28 (= .cse32 0)) (.cse27 (or (= |c_ULTIMATE.start_main_~y~0#1| .cse22) .cse20 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256) 0)) (= 0 .cse22)))) (let ((.cse26 (or .cse17 (and (or .cse11 .cse14 .cse15 .cse16 .cse28) .cse27))) (.cse24 (or (and (or .cse11 .cse18 .cse19 .cse28) .cse27) .cse17))) (and (or .cse9 (let ((.cse25 (or (and .cse27 (or .cse11 .cse12 .cse13 .cse28)) .cse6))) (and (or .cse4 (and .cse24 .cse25)) (or (and .cse25 .cse26) .cse3)))) (or (and (or (and (or .cse6 (and .cse8 .cse27)) .cse26) .cse3) (or .cse4 (and .cse24 (or .cse6 (and .cse27 (or .cse29 .cse11 .cse30 .cse28 .cse31)))))) .cse0)))))))))) is different from false [2021-11-20 06:56:55,566 WARN L227 SmtUtils]: Spent 35.34s on a formula simplification. DAG size of input: 43 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:56:57,570 WARN L838 $PredicateComparison]: unable to prove that (and (or (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main_~y~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0)) (< 0 |c_ULTIMATE.start_main_~y~0#1|) (<= |c_ULTIMATE.start_main_~y~0#1| 127) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_main_~y~0#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |c_ULTIMATE.start_main_~y~0#1|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-20 06:56:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:57,669 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-20 06:56:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:56:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 06:56:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:57,670 INFO L225 Difference]: With dead ends: 22 [2021-11-20 06:56:57,670 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 06:56:57,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 348.2s TimeCoverageRelationStatistics Valid=75, Invalid=213, Unknown=24, NotChecked=390, Total=702 [2021-11-20 06:56:57,672 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:57,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 37 Unchecked, 1.9s Time] [2021-11-20 06:56:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 06:56:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-20 06:56:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-20 06:56:57,677 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-11-20 06:56:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:57,677 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-20 06:56:57,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:57,678 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-20 06:56:57,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:56:57,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:57,679 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:56:57,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:57,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:57,883 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:56:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:57,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2096200307, now seen corresponding path program 1 times [2021-11-20 06:56:57,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:57,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892077507] [2021-11-20 06:56:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:57,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:57,891 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:56:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734965847] [2021-11-20 06:56:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:57,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:57,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:57,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b91cfbbe-5cf0-418a-9a39-6875bf58dae4/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:56:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:57,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:56:57,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:56:58,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:47,226 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_gcd_test_~a#1_22| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_22| |c_ULTIMATE.start_gcd_test_~b#1|) (let ((.cse19 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse28 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse19) 256)) (.cse27 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse19) 256))) (let ((.cse13 (not (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_22| .cse27) 256)))) (.cse14 (= .cse27 0)) (.cse8 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (= .cse28 0)) (.cse10 (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_22| .cse28) 256) 0)))) (let ((.cse16 (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_22| (+ (- 256) .cse28)) 256) 0))) (.cse17 (<= .cse28 127)) (.cse5 (< 127 .cse27)) (.cse6 (<= .cse27 127)) (.cse3 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse4 (or .cse8 .cse9 .cse10)) (.cse12 (< 127 .cse28)) (.cse18 (not (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_22| (+ (- 256) .cse27)) 256)))) (.cse0 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse2 (or .cse8 .cse13 .cse14)) (.cse20 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse21 (mod .cse19 256))) (and (or (let ((.cse1 (or .cse20 (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_22| .cse21) 256) 0)) (= 0 .cse21))) (.cse11 (= .cse19 0))) (let ((.cse7 (or .cse0 (and .cse1 (or .cse8 .cse18 .cse11))))) (and (or (and (or (and (or .cse0 (and .cse1 .cse2)) (or .cse3 (and .cse1 .cse4))) .cse5) (or .cse6 (and .cse7 (or .cse3 (and .cse1 (or .cse8 .cse9 .cse10 .cse11)))))) .cse12) (or (let ((.cse15 (or (and .cse1 (or .cse8 .cse16 .cse11)) .cse3))) (and (or (and (or .cse0 (and (or .cse8 .cse13 .cse14 .cse11) .cse1)) .cse15) .cse5) (or .cse6 (and .cse7 .cse15)))) .cse17)))) (< 127 .cse21)) (or (let ((.cse25 (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_22| (+ (- 256) .cse21)) 256) 0)) .cse20))) (let ((.cse23 (or .cse0 (and .cse25 .cse2))) (.cse24 (or (and .cse25 (or .cse8 .cse18)) .cse0))) (and (or (let ((.cse22 (or .cse3 (and .cse25 (or .cse8 .cse16))))) (and (or (and .cse22 .cse23) .cse5) (or .cse6 (and .cse22 .cse24)))) .cse17) (or (let ((.cse26 (or .cse3 (and .cse25 .cse4)))) (and (or (and .cse26 .cse23) .cse5) (or .cse6 (and .cse24 .cse26)))) .cse12)))) (<= .cse21 127))))))))) is different from false