./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0 --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 bf18a45b9b9a30137533b9517bddb2c27979a6060c07746e0407bf72765a3792 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:10:02,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:10:02,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:10:02,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:10:02,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:10:02,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:10:02,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:10:02,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:10:02,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:10:02,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:10:02,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:10:02,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:10:02,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:10:02,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:10:02,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:10:02,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:10:02,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:10:02,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:10:02,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:10:02,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:10:02,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:10:02,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:10:02,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:10:02,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:10:02,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:10:02,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:10:02,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:10:02,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:10:02,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:10:02,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:10:02,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:10:02,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:10:02,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:10:02,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:10:02,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:10:02,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:10:02,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:10:02,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:10:02,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:10:02,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:10:02,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:10:02,796 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:10:02,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:10:02,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:10:02,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:10:02,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:10:02,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:10:02,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:10:02,843 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:10:02,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:10:02,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:10:02,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:10:02,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:10:02,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:10:02,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:10:02,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:10:02,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:10:02,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:10:02,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:10:02,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:10:02,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:10:02,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:10:02,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:10:02,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:10:02,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:10:02,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:10:02,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:10:02,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:10:02,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:10:02,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:10:02,849 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:10:02,849 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:10:02,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:10:02,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:10:02,850 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_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf18a45b9b9a30137533b9517bddb2c27979a6060c07746e0407bf72765a3792 [2021-11-22 15:10:03,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:10:03,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:10:03,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:10:03,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:10:03,142 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:10:03,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/combinations/gcd_1+newton_3_3.i [2021-11-22 15:10:03,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/data/96140de46/3624e2cfe8264efbb115a1edd2df8fe6/FLAGd1f874f26 [2021-11-22 15:10:03,676 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:10:03,676 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i [2021-11-22 15:10:03,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/data/96140de46/3624e2cfe8264efbb115a1edd2df8fe6/FLAGd1f874f26 [2021-11-22 15:10:04,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/data/96140de46/3624e2cfe8264efbb115a1edd2df8fe6 [2021-11-22 15:10:04,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:10:04,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:10:04,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:10:04,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:10:04,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:10:04,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3106f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04, skipping insertion in model container [2021-11-22 15:10:04,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:10:04,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:10:04,306 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_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[1226,1239] [2021-11-22 15:10:04,335 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_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[2828,2841] [2021-11-22 15:10:04,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:10:04,345 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:10:04,357 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_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[1226,1239] [2021-11-22 15:10:04,370 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_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/sv-benchmarks/c/combinations/gcd_1+newton_3_3.i[2828,2841] [2021-11-22 15:10:04,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:10:04,390 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:10:04,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04 WrapperNode [2021-11-22 15:10:04,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:10:04,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:10:04,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:10:04,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:10:04,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,459 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 100 [2021-11-22 15:10:04,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:10:04,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:10:04,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:10:04,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:10:04,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:10:04,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:10:04,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:10:04,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:10:04,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (1/1) ... [2021-11-22 15:10:04,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:10:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:10:04,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:10:04,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:10:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:10:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:10:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:10:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:10:04,654 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:10:04,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:10:04,859 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:10:04,865 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:10:04,865 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 15:10:04,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:10:04 BoogieIcfgContainer [2021-11-22 15:10:04,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:10:04,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:10:04,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:10:04,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:10:04,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:10:04" (1/3) ... [2021-11-22 15:10:04,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c9b7a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:10:04, skipping insertion in model container [2021-11-22 15:10:04,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:10:04" (2/3) ... [2021-11-22 15:10:04,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c9b7a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:10:04, skipping insertion in model container [2021-11-22 15:10:04,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:10:04" (3/3) ... [2021-11-22 15:10:04,876 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_3.i [2021-11-22 15:10:04,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:10:04,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 15:10:04,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:10:04,935 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 [2021-11-22 15:10:04,935 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 15:10:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-11-22 15:10:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:10:04,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:10:04,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:10:04,957 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:10:04,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:10:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2030598962, now seen corresponding path program 1 times [2021-11-22 15:10:04,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:10:04,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957368928] [2021-11-22 15:10:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:10:04,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:10:05,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:10:05,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277618954] [2021-11-22 15:10:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:10:05,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:10:05,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:10:05,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:10:05,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:10:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:10:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:10:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:10:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:10:05,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:10:05,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:10:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957368928] [2021-11-22 15:10:05,246 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:10:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277618954] [2021-11-22 15:10:05,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277618954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:10:05,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:10:05,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:10:05,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643627236] [2021-11-22 15:10:05,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:10:05,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:10:05,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:10:05,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:10:05,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:10:05,308 INFO L87 Difference]: Start difference. First operand has 31 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 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 3.6666666666666665) internal successors, (11), 3 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) [2021-11-22 15:10:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:10:05,349 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2021-11-22 15:10:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:10:05,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-11-22 15:10:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:10:05,357 INFO L225 Difference]: With dead ends: 56 [2021-11-22 15:10:05,357 INFO L226 Difference]: Without dead ends: 24 [2021-11-22 15:10:05,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:10:05,364 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 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 [2021-11-22 15:10:05,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:10:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-22 15:10:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-22 15:10:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-11-22 15:10:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-22 15:10:05,398 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2021-11-22 15:10:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:10:05,399 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-22 15:10:05,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-22 15:10:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-22 15:10:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 15:10:05,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:10:05,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:10:05,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:10:05,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-22 15:10:05,629 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:10:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:10:05,630 INFO L85 PathProgramCache]: Analyzing trace with hash 350720432, now seen corresponding path program 1 times [2021-11-22 15:10:05,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:10:05,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396884511] [2021-11-22 15:10:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:10:05,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:10:05,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:10:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718627065] [2021-11-22 15:10:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:10:05,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:10:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:10:05,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:10:05,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:10:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:10:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:10:05,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:10:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:10:05,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:10:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:10:05,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:10:05,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396884511] [2021-11-22 15:10:05,937 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:10:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718627065] [2021-11-22 15:10:05,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718627065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:10:05,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:10:05,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-22 15:10:05,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516994919] [2021-11-22 15:10:05,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:10:05,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:10:05,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:10:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:10:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:10:05,941 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:10:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:10:06,020 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-22 15:10:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:10:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 15:10:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:10:06,026 INFO L225 Difference]: With dead ends: 30 [2021-11-22 15:10:06,026 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 15:10:06,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:10:06,028 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:10:06,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 88 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:10:06,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 15:10:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-22 15:10:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-11-22 15:10:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-22 15:10:06,034 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2021-11-22 15:10:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:10:06,034 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-22 15:10:06,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:10:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-22 15:10:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 15:10:06,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:10:06,036 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:10:06,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:10:06,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:10:06,256 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:10:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:10:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1960913808, now seen corresponding path program 2 times [2021-11-22 15:10:06,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:10:06,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780404775] [2021-11-22 15:10:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:10:06,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:10:06,269 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:10:06,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951755860] [2021-11-22 15:10:06,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:10:06,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:10:06,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:10:06,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:10:06,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:10:12,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:10:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:10:12,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-22 15:10:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:13:23,599 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-22 15:14:04,244 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-22 15:14:57,077 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-22 15:15:39,878 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-22 15:15:41,885 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true [2021-11-22 15:16:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-22 15:16:22,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:19:06,165 WARN L227 SmtUtils]: Spent 2.16m on a formula simplification. DAG size of input: 114 DAG size of output: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:19:34,804 WARN L227 SmtUtils]: Spent 18.65s on a formula simplification. DAG size of input: 65 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:19:57,206 WARN L227 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 44 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:21:07,636 WARN L227 SmtUtils]: Spent 23.87s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:21:30,606 WARN L227 SmtUtils]: Spent 5.88s 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) [2021-11-22 15:22:09,372 WARN L227 SmtUtils]: Spent 5.30s 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) [2021-11-22 15:22:34,264 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from false [2021-11-22 15:22:36,267 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from true [2021-11-22 15:22:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:22:38,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:22:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780404775] [2021-11-22 15:22:38,279 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:22:38,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951755860] [2021-11-22 15:22:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951755860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:22:38,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:22:38,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-11-22 15:22:38,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035874842] [2021-11-22 15:22:38,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:22:38,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 15:22:38,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:22:38,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 15:22:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=129, Unknown=31, NotChecked=140, Total=342 [2021-11-22 15:22:38,282 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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) [2021-11-22 15:23:29,701 WARN L227 SmtUtils]: Spent 47.15s 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) [2021-11-22 15:23:31,728 WARN L838 $PredicateComparison]: unable to prove that (and (or (let ((.cse1 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (= .cse0 0) (< 127 .cse1) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0)))) (let ((.cse2 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_main1_~y~0#1|))) (or (<= .cse1 127) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main1_~y~0#1| 255) .cse2) 256) (- 256))) 256) 0)) (= .cse2 0))))) (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 0)) (or (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (let ((.cse4 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (and (let ((.cse3 (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (= .cse3 0) (< 127 .cse4) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse3) 256) 0)))) (or (<= .cse4 127) (let ((.cse6 (mod (+ (- 256) .cse4) |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse6) 256))) (and (or (< 127 .cse5) (= .cse5 0)) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse5)) 256) 0)) (<= .cse5 127) (= .cse6 0)))))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2021-11-22 15:23:34,842 WARN L838 $PredicateComparison]: unable to prove that (and (or (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse8 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse8) 256))) (let ((.cse3 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse12)) 256) 0))) (.cse0 (<= .cse12 127)) (.cse5 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse12) 256) 0))) (.cse2 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse6 (= .cse12 0)) (.cse7 (< 127 .cse12)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse10 (mod .cse8 256))) (and (or (let ((.cse1 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse10) 256) 0)) (= 0 .cse10))) (.cse4 (= .cse8 0))) (and (or .cse0 (and .cse1 (or .cse2 .cse3 .cse4))) (or (and .cse1 (or .cse5 .cse2 .cse6 .cse4)) .cse7))) (< 127 .cse10)) (or (<= .cse10 127) (let ((.cse11 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse10)) 256) 0))))) (and (or (and (or .cse2 .cse3) .cse11) .cse0) (or (and .cse11 (or .cse5 .cse2 .cse6)) .cse7))))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (let ((.cse13 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| .cse13) (<= .cse13 127)) (and (< 127 .cse13) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse13)))) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2021-11-22 15:23:36,884 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse20 (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| .cse20) 256))) (let ((.cse11 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse16 (= .cse28 0)) (.cse29 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse20) 256))) (let ((.cse17 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse18 (<= .cse29 127)) (.cse8 (< 127 .cse28)) (.cse2 (<= .cse28 127)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse10 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse12 (= .cse29 0)) (.cse1 (< 127 .cse29)) (.cse19 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256)))) (.cse7 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (or .cse11 .cse15 .cse16)) (.cse21 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse22 (mod .cse20 256))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (<= .cse0 127)) (and (< 127 .cse0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse0)))) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (or (let ((.cse5 (or .cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256) 0)) (= 0 .cse22))) (.cse13 (= .cse20 0))) (let ((.cse3 (or .cse7 (and .cse5 (or .cse11 .cse19 .cse13))))) (and (or .cse1 (let ((.cse4 (or .cse9 (and .cse5 (or .cse10 .cse11 .cse12 .cse13))))) (and (or .cse2 (and .cse3 .cse4)) (or (and .cse4 (or (and .cse5 .cse6) .cse7)) .cse8)))) (or (let ((.cse14 (or .cse9 (and .cse5 (or .cse11 .cse17 .cse13))))) (and (or (and .cse14 (or .cse7 (and (or .cse11 .cse15 .cse16 .cse13) .cse5))) .cse8) (or .cse2 (and .cse3 .cse14)))) .cse18)))) (< 127 .cse22)) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (<= .cse22 127) (let ((.cse26 (or .cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse22)) 256) 0))))) (let ((.cse24 (or .cse7 (and .cse26 .cse6))) (.cse25 (or .cse7 (and .cse26 (or .cse11 .cse19))))) (and (or (let ((.cse23 (or (and (or .cse11 .cse17) .cse26) .cse9))) (and (or (and .cse23 .cse24) .cse8) (or .cse2 (and .cse23 .cse25)))) .cse18) (or (let ((.cse27 (or .cse9 (and .cse26 (or .cse10 .cse11 .cse12))))) (and (or (and .cse27 .cse24) .cse8) (or .cse2 (and .cse27 .cse25)))) .cse1)))))))))) is different from false [2021-11-22 15:24:23,674 WARN L227 SmtUtils]: Spent 31.22s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:24:25,686 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (or (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0))) is different from false [2021-11-22 15:24:27,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 15:24:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:27,759 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-22 15:24:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:24:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 15:24:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:27,761 INFO L225 Difference]: With dead ends: 34 [2021-11-22 15:24:27,761 INFO L226 Difference]: Without dead ends: 29 [2021-11-22 15:24:27,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 366.1s TimeCoverageRelationStatistics Valid=59, Invalid=178, Unknown=39, NotChecked=324, Total=600 [2021-11-22 15:24:27,764 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:27,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 179 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 1 Unknown, 50 Unchecked, 2.1s Time] [2021-11-22 15:24:27,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-22 15:24:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-22 15:24:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-11-22 15:24:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-22 15:24:27,769 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 13 [2021-11-22 15:24:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:27,770 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-22 15:24:27,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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) [2021-11-22 15:24:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-22 15:24:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 15:24:27,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:27,774 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:27,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 15:24:27,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:27,977 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:27,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:27,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1280855438, now seen corresponding path program 1 times [2021-11-22 15:24:27,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:27,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287300115] [2021-11-22 15:24:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:27,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:27,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:24:27,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946044706] [2021-11-22 15:24:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:27,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:27,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:24:28,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e824ca09-6b7f-48a8-b092-cb5f92e9d8c4/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:24:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:28,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 15:24:28,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:28,722 INFO L328 TraceCheckSpWp]: Computing backward predicates...