./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa --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 8b7456a459f55f53693cf2fdc2ecfa85b54010339cb65d2080cc061b58d33cf8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:10:36,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:10:36,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:10:36,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:10:36,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:10:36,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:10:36,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:10:36,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:10:36,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:10:36,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:10:36,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:10:36,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:10:36,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:10:36,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:10:36,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:10:36,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:10:36,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:10:36,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:10:36,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:10:36,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:10:36,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:10:36,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:10:36,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:10:36,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:10:36,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:10:36,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:10:36,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:10:36,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:10:36,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:10:36,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:10:36,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:10:36,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:10:36,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:10:36,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:10:36,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:10:36,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:10:36,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:10:36,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:10:36,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:10:36,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:10:36,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:10:36,238 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:10:36,257 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:10:36,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:10:36,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:10:36,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:10:36,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:10:36,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:10:36,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:10:36,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:10:36,259 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:10:36,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:10:36,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:10:36,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:10:36,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:10:36,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:10:36,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:10:36,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:10:36,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:10:36,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:10:36,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:10:36,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:10:36,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:10:36,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:10:36,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:10:36,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:10:36,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:10:36,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:10:36,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:10:36,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:10:36,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:10:36,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:10:36,262 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:10:36,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:10:36,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:10:36,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:10:36,262 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_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b7456a459f55f53693cf2fdc2ecfa85b54010339cb65d2080cc061b58d33cf8 [2021-12-06 22:10:36,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:10:36,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:10:36,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:10:36,470 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:10:36,471 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:10:36,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_3+newton_2_1.i [2021-12-06 22:10:36,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/data/a85011991/b6fa672302934f4e9cd05854dbfa152b/FLAG1cb256409 [2021-12-06 22:10:36,911 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:10:36,911 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i [2021-12-06 22:10:36,918 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/data/a85011991/b6fa672302934f4e9cd05854dbfa152b/FLAG1cb256409 [2021-12-06 22:10:36,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/data/a85011991/b6fa672302934f4e9cd05854dbfa152b [2021-12-06 22:10:36,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:10:36,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:10:36,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:10:36,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:10:36,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:10:36,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:10:36" (1/1) ... [2021-12-06 22:10:36,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e6a90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:36, skipping insertion in model container [2021-12-06 22:10:36,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:10:36" (1/1) ... [2021-12-06 22:10:36,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:10:36,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:10:37,067 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_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i[1226,1239] [2021-12-06 22:10:37,086 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_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i[2841,2854] [2021-12-06 22:10:37,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:10:37,093 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:10:37,101 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_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i[1226,1239] [2021-12-06 22:10:37,109 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_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/sv-benchmarks/c/combinations/gcd_3+newton_2_1.i[2841,2854] [2021-12-06 22:10:37,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:10:37,119 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:10:37,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37 WrapperNode [2021-12-06 22:10:37,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:10:37,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:10:37,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:10:37,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:10:37,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,153 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-06 22:10:37,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:10:37,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:10:37,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:10:37,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:10:37,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:10:37,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:10:37,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:10:37,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:10:37,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (1/1) ... [2021-12-06 22:10:37,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:10:37,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:37,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:10:37,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:10:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:10:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-06 22:10:37,236 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-06 22:10:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-06 22:10:37,236 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-06 22:10:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:10:37,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:10:37,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:10:37,291 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:10:37,293 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:10:37,403 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:10:37,409 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:10:37,409 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 22:10:37,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:10:37 BoogieIcfgContainer [2021-12-06 22:10:37,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:10:37,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:10:37,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:10:37,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:10:37,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:10:36" (1/3) ... [2021-12-06 22:10:37,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f84cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:10:37, skipping insertion in model container [2021-12-06 22:10:37,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:10:37" (2/3) ... [2021-12-06 22:10:37,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f84cb91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:10:37, skipping insertion in model container [2021-12-06 22:10:37,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:10:37" (3/3) ... [2021-12-06 22:10:37,420 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_1.i [2021-12-06 22:10:37,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:10:37,426 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 22:10:37,470 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:10:37,476 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 [2021-12-06 22:10:37,476 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 22:10:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 22:10:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:10:37,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:37,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:37,497 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:37,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-06 22:10:37,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:37,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293673837] [2021-12-06 22:10:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:37,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:37,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293673837] [2021-12-06 22:10:37,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293673837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:10:37,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:10:37,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:10:37,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063061875] [2021-12-06 22:10:37,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:10:37,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:10:37,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:37,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:10:37,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:10:37,729 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:37,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:37,781 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-06 22:10:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:10:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 22:10:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:37,792 INFO L225 Difference]: With dead ends: 90 [2021-12-06 22:10:37,792 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 22:10:37,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:10:37,800 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:37,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:10:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 22:10:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-06 22:10:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 22:10:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-06 22:10:37,839 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-12-06 22:10:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:37,839 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-06 22:10:37,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-06 22:10:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:10:37,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:37,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:37,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:10:37,842 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-06 22:10:37,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367981609] [2021-12-06 22:10:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:37,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:10:37,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:10:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367981609] [2021-12-06 22:10:37,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367981609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:10:37,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:10:37,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:10:37,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701990344] [2021-12-06 22:10:37,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:10:37,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:10:37,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:10:37,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:10:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:10:37,912 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:10:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:10:37,965 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-06 22:10:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:10:37,966 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 [2021-12-06 22:10:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:10:37,966 INFO L225 Difference]: With dead ends: 36 [2021-12-06 22:10:37,966 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 22:10:37,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:10:37,968 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:10:37,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:10:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 22:10:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 22:10:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 22:10:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-06 22:10:37,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-06 22:10:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:10:37,974 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-06 22:10:37,974 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) [2021-12-06 22:10:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-06 22:10:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 22:10:37,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:10:37,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:10:37,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:10:37,976 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:10:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:10:37,977 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-06 22:10:37,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:10:37,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751565097] [2021-12-06 22:10:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:37,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:10:37,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:10:37,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542151423] [2021-12-06 22:10:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:10:37,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:10:37,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:10:37,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:10:37,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:10:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:10:38,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 22:10:38,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:06,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:12,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751565097] [2021-12-06 22:11:12,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:11:12,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542151423] [2021-12-06 22:11:12,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542151423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:12,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:11:12,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-06 22:11:12,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350565915] [2021-12-06 22:11:12,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:12,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:11:12,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:11:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=211, Unknown=7, NotChecked=0, Total=272 [2021-12-06 22:11:12,867 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:15,637 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-06 22:11:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:11:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 22:11:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:15,638 INFO L225 Difference]: With dead ends: 42 [2021-12-06 22:11:15,638 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 22:11:15,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=74, Invalid=260, Unknown=8, NotChecked=0, Total=342 [2021-12-06 22:11:15,640 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:15,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-06 22:11:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 22:11:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-06 22:11:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 22:11:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-06 22:11:15,645 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-06 22:11:15,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:15,645 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-06 22:11:15,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-06 22:11:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:11:15,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:15,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:15,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:11:15,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:15,849 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:15,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-12-06 22:11:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:15,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567651292] [2021-12-06 22:11:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:15,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:15,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:11:15,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470534674] [2021-12-06 22:11:15,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:11:15,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:15,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:15,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:11:15,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:11:15,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:15,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 22:11:15,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:11:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:20,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:11:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:11:58,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:11:58,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567651292] [2021-12-06 22:11:58,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:11:58,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470534674] [2021-12-06 22:11:58,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470534674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:11:58,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:11:58,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-06 22:11:58,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727962363] [2021-12-06 22:11:58,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:11:58,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:11:58,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:11:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:11:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=179, Unknown=12, NotChecked=0, Total=240 [2021-12-06 22:11:58,532 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:11:58,748 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-06 22:11:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:11:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 22:11:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:11:58,750 INFO L225 Difference]: With dead ends: 43 [2021-12-06 22:11:58,750 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 22:11:58,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=49, Invalid=179, Unknown=12, NotChecked=0, Total=240 [2021-12-06 22:11:58,752 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:11:58,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-06 22:11:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 22:11:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 22:11:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 22:11:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-06 22:11:58,760 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-12-06 22:11:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:11:58,760 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-06 22:11:58,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:11:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-06 22:11:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 22:11:58,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:11:58,761 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:11:58,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:11:58,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:58,963 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:11:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:11:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-12-06 22:11:58,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:11:58,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254645417] [2021-12-06 22:11:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:11:58,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:11:58,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 22:11:58,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181856942] [2021-12-06 22:11:58,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:11:58,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:11:58,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:11:58,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:11:58,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24ebc2-e0b1-403e-8ea1-0cdddec4e585/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:11:59,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:11:59,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:11:59,060 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 22:11:59,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:12:22,159 WARN L227 SmtUtils]: Spent 7.44s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:12:45,183 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse4) 256))) (let ((.cse3 (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse2 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse3 256)) (= (mod (mod .cse4 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse4 127) (= .cse3 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse9 (+ .cse5 (- 256)))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (let ((.cse6 (mod .cse8 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (mod .cse9 .cse8))) (and (< 127 .cse5) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse6 256)) (not (= .cse7 0)) (not (= .cse8 0)) (= .cse6 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse8 255) .cse7) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse10 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse13 (+ .cse10 (- 256)))) (let ((.cse11 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse12 (mod .cse13 .cse11))) (and (< 127 .cse10) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse11 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse12 0)) (not (= .cse11 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse11 255) .cse12) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-12-06 22:12:50,303 WARN L860 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127) (= (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse3 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (and (not (= .cse2 0)) (= (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (mod (mod .cse3 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse3 127))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse5 (mod .cse7 .cse6))) (and (< 127 .cse4) (not (= .cse5 0)) (not (= .cse6 0)) (= (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse6 255) .cse5) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse8 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse11 (+ .cse8 (- 256)))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (let ((.cse9 (mod .cse11 .cse10))) (and (< 127 .cse8) (not (= .cse9 0)) (not (= .cse10 0)) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse10 255) .cse9) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from true [2021-12-06 22:12:54,262 WARN L838 $PredicateComparison]: unable to prove that (and (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (+ .cse0 (- 256)))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (let ((.cse1 (mod .cse3 .cse2))) (and (< 127 .cse0) (not (= .cse1 0)) (= (mod .cse2 |c_ULTIMATE.start_gcd_test_#res#1|) 0) (not (= .cse2 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse2 255) .cse1) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse5 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse6 (mod .cse7 .cse5))) (and (< 127 .cse4) (= (mod (mod .cse5 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= .cse6 0)) (not (= .cse5 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse5 255) .cse6) 256))))))))) (< |c_ULTIMATE.start_gcd_test_#res#1| 0)) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (and (not (= .cse8 0)) (= (mod (mod .cse9 .cse8) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (<= .cse9 127) (= (mod .cse8 |c_ULTIMATE.start_gcd_test_#res#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse11 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (and (not (= .cse10 0)) (= (mod (mod .cse11 .cse10) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= .cse11 127)))))) (<= 0 |c_ULTIMATE.start_gcd_test_#res#1|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_gcd_test_#res#1| 0))) is different from false [2021-12-06 22:13:35,568 WARN L227 SmtUtils]: Spent 29.08s on a formula simplification. DAG size of input: 60 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:13:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 22:13:42,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:16:09,578 WARN L227 SmtUtils]: Spent 1.96m on a formula simplification. DAG size of input: 82 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:22:44,545 WARN L227 SmtUtils]: Spent 4.46m on a formula simplification. DAG size of input: 93 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:23:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:37,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:37,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254645417] [2021-12-06 22:23:37,884 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 22:23:37,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181856942] [2021-12-06 22:23:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181856942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:37,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:23:37,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-06 22:23:37,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987532077] [2021-12-06 22:23:37,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:37,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:23:37,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:37,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:23:37,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=210, Unknown=31, NotChecked=102, Total=420 [2021-12-06 22:23:37,886 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:04,418 WARN L227 SmtUtils]: Spent 21.16s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 22:24:09,761 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse28 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse3 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse1 (mod .cse28 256))) (and (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 .cse1)) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or .cse0 (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|) (not .cse2)) (or (and .cse3 (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse4 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse5) 256))) (and (not (= .cse4 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse5 .cse4) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse5 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse8 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse8) 256))) (let ((.cse7 (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse6 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256)) (= (mod (mod .cse8 .cse6) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse8 127) (= .cse7 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse13 (+ .cse9 (- 256)))) (let ((.cse12 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse13) 256))) (let ((.cse10 (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse11 (mod .cse13 .cse12))) (and (< 127 .cse9) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse10 256)) (not (= .cse11 0)) (not (= .cse12 0)) (= .cse10 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse12 255) .cse11) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse14 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse17 (+ .cse14 (- 256)))) (let ((.cse15 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse17) 256))) (let ((.cse16 (mod .cse17 .cse15))) (and (< 127 .cse14) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse15 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse16 0)) (not (= .cse15 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse15 255) .cse16) 256))))))))) .cse18)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (or .cse0 .cse2 (let ((.cse29 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256)) (.cse30 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse28) 256))) (let ((.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse30) 256) 0))) (.cse20 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse21 (<= .cse30 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse22 (< 127 .cse30)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse24 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse25 (<= .cse29 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse26 (< 127 .cse29))) (and (or (and (or .cse19 .cse3 .cse20 .cse21 .cse22) (or .cse3 .cse23 .cse24 .cse25 .cse26)) (<= .cse1 127)) (or (let ((.cse27 (= .cse28 0))) (and (or .cse19 .cse3 .cse20 .cse21 .cse22 .cse27) (or (<= .cse1 |c_ULTIMATE.start_main1_~x~0#1|) .cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0))) (or .cse3 .cse23 .cse24 .cse25 .cse27 .cse26))) (< 127 .cse1))))))))) is different from false [2021-12-06 22:24:11,785 WARN L838 $PredicateComparison]: unable to prove that (and (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse1 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse1) 256))) (and (not (= .cse0 0)) (= (mod (mod .cse1 .cse0) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse1 127) (= (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse3 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (and (not (= .cse2 0)) (= (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (mod (mod .cse3 .cse2) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse3 127))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse6 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse5 (mod .cse7 .cse6))) (and (< 127 .cse4) (not (= .cse5 0)) (not (= .cse6 0)) (= (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse6 255) .cse5) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse8 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse11 (+ .cse8 (- 256)))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (let ((.cse9 (mod .cse11 .cse10))) (and (< 127 .cse8) (not (= .cse9 0)) (not (= .cse10 0)) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse10 255) .cse9) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-12-06 22:24:15,028 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse32) 256)) (.cse16 (mod .cse32 256))) (let ((.cse1 (= 0 .cse16)) (.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0)) (.cse2 (<= .cse16 127)) (.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (< 127 .cse21)) (.cse15 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse19 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse17 (= .cse32 0)) (.cse20 (< 127 .cse16)) (.cse24 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256))) (and (or .cse0 (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#1|)) (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not .cse1) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (or .cse0 (let ((.cse23 (+ (- 256) .cse21))) (let ((.cse22 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256))) (let ((.cse9 (= .cse21 0)) (.cse10 (not (= (mod (mod .cse21 .cse24) 256) 0))) (.cse11 (<= .cse24 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse3 (not (= (mod (mod .cse23 .cse22) 256) 0))) (.cse5 (<= .cse22 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse8 (<= .cse21 127))) (and (or .cse2 (let ((.cse6 (let ((.cse13 (+ (- 256) .cse16))) (let ((.cse14 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse13) 256))) (or (not (= (mod (mod .cse13 .cse14) 256) 0)) .cse15 (<= .cse14 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (and (or .cse3 .cse4 .cse5) .cse6) .cse7 .cse8) (or .cse7 (and (or .cse4 .cse9 .cse10 .cse11) .cse6) .cse12)))) (or (let ((.cse18 (or (<= .cse19 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse19) 256) 0)) .cse15 .cse1))) (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse17) .cse18) .cse7 .cse12) (or .cse7 (and .cse18 (or .cse3 .cse4 .cse5 .cse17)) .cse8))) .cse20)))))) (or .cse0 (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse31 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256))) (let ((.cse25 (not (= .cse24 0))) (.cse26 (<= .cse21 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse27 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 256) 0))) (.cse28 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse29 (<= .cse31 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse30 (< 127 .cse31))) (and (or (and (or .cse25 .cse4 .cse7 .cse26 .cse12) (or .cse4 .cse27 .cse28 .cse29 .cse30)) .cse2) (or (and (or .cse25 .cse4 .cse7 .cse26 .cse12 .cse17) (or (<= .cse16 |c_ULTIMATE.start_main1_~x~0#1|) .cse15 (not (= .cse19 0))) (or .cse4 .cse27 .cse28 .cse29 .cse17 .cse30)) .cse20))))))))) is different from true [2021-12-06 22:24:17,040 WARN L838 $PredicateComparison]: unable to prove that (and (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (+ .cse0 (- 256)))) (let ((.cse2 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (let ((.cse1 (mod .cse3 .cse2))) (and (< 127 .cse0) (not (= .cse1 0)) (= (mod .cse2 |c_ULTIMATE.start_gcd_test_#res#1|) 0) (not (= .cse2 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse2 255) .cse1) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse4 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse7 (+ .cse4 (- 256)))) (let ((.cse5 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse7) 256))) (let ((.cse6 (mod .cse7 .cse5))) (and (< 127 .cse4) (= (mod (mod .cse5 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= .cse6 0)) (not (= .cse5 0)) (= (+ 256 |c_ULTIMATE.start_gcd_test_#res#1|) (mod (+ (* .cse5 255) .cse6) 256))))))))) (< |c_ULTIMATE.start_gcd_test_#res#1| 0)) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse9 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse8 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse9) 256))) (and (not (= .cse8 0)) (= (mod (mod .cse9 .cse8) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (<= .cse9 127) (= (mod .cse8 |c_ULTIMATE.start_gcd_test_#res#1|) 0))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse11 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse10 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse11) 256))) (and (not (= .cse10 0)) (= (mod (mod .cse11 .cse10) 256) |c_ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod .cse10 |c_ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= .cse11 127)))))) (<= 0 |c_ULTIMATE.start_gcd_test_#res#1|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (< 127 |c_ULTIMATE.start_gcd_test_#res#1|) (<= |c_ULTIMATE.start_gcd_test_#res#1| |c_ULTIMATE.start_main1_~x~0#1|)) (not (= |c_ULTIMATE.start_gcd_test_#res#1| 0))) is different from false [2021-12-06 22:24:19,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []