./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_2_2.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_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0125703895252bbc87284f9ee87e686d5271b5cf813038cb613c1b0c2ad30cb5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:06:24,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:06:24,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:06:24,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:06:24,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:06:24,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:06:24,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:06:24,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:06:24,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:06:24,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:06:24,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:06:24,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:06:24,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:06:24,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:06:24,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:06:24,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:06:24,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:06:24,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:06:24,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:06:24,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:06:24,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:06:24,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:06:24,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:06:24,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:06:24,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:06:24,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:06:24,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:06:24,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:06:24,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:06:24,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:06:24,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:06:24,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:06:24,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:06:24,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:06:24,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:06:24,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:06:24,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:06:24,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:06:24,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:06:24,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:06:24,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:06:24,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:06:24,257 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:06:24,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:06:24,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:06:24,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:06:24,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:06:24,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:06:24,268 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:06:24,268 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:06:24,268 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:06:24,269 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:06:24,270 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:06:24,270 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:06:24,271 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:06:24,271 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:06:24,271 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:06:24,272 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:06:24,272 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:06:24,272 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:06:24,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:06:24,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:06:24,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:06:24,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:06:24,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:06:24,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:06:24,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:06:24,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:06:24,277 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:06:24,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:06:24,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:06:24,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:06:24,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:06:24,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:06:24,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:24,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:06:24,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:06:24,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:06:24,280 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:06:24,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:06:24,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:06:24,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:06:24,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:06:24,281 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0125703895252bbc87284f9ee87e686d5271b5cf813038cb613c1b0c2ad30cb5 [2021-11-23 02:06:24,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:06:24,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:06:24,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:06:24,656 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:06:24,657 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:06:24,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/gcd_1+newton_2_2.i [2021-11-23 02:06:24,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/data/8d4b668cc/5ea5ae6e5e6c4ea8abef3e492c9c9397/FLAGa8c31a587 [2021-11-23 02:06:25,329 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:06:25,330 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/sv-benchmarks/c/combinations/gcd_1+newton_2_2.i [2021-11-23 02:06:25,341 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/data/8d4b668cc/5ea5ae6e5e6c4ea8abef3e492c9c9397/FLAGa8c31a587 [2021-11-23 02:06:25,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/data/8d4b668cc/5ea5ae6e5e6c4ea8abef3e492c9c9397 [2021-11-23 02:06:25,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:06:25,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:06:25,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:25,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:06:25,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:06:25,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:25" (1/1) ... [2021-11-23 02:06:25,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abfd64c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:25, skipping insertion in model container [2021-11-23 02:06:25,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:25" (1/1) ... [2021-11-23 02:06:25,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:06:25,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:06:25,955 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_479ac088-e603-4948-aa2e-9ee1f2ef7a13/sv-benchmarks/c/combinations/gcd_1+newton_2_2.i[1226,1239] [2021-11-23 02:06:25,990 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_479ac088-e603-4948-aa2e-9ee1f2ef7a13/sv-benchmarks/c/combinations/gcd_1+newton_2_2.i[2807,2820] [2021-11-23 02:06:25,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:26,003 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:06:26,031 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_479ac088-e603-4948-aa2e-9ee1f2ef7a13/sv-benchmarks/c/combinations/gcd_1+newton_2_2.i[1226,1239] [2021-11-23 02:06:26,066 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_479ac088-e603-4948-aa2e-9ee1f2ef7a13/sv-benchmarks/c/combinations/gcd_1+newton_2_2.i[2807,2820] [2021-11-23 02:06:26,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:26,100 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:06:26,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26 WrapperNode [2021-11-23 02:06:26,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:26,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:26,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:06:26,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:06:26,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,160 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-11-23 02:06:26,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:26,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:06:26,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:06:26,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:06:26,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:06:26,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:06:26,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:06:26,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:06:26,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2021-11-23 02:06:26,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:26,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:06:26,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:06:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:06:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-23 02:06:26,341 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-23 02:06:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-23 02:06:26,342 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-23 02:06:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:06:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:06:26,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:06:26,439 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:06:26,442 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:06:26,650 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:06:26,744 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:06:26,757 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:06:26,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:26 BoogieIcfgContainer [2021-11-23 02:06:26,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:06:26,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:06:26,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:06:26,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:06:26,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:25" (1/3) ... [2021-11-23 02:06:26,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2915b844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:26, skipping insertion in model container [2021-11-23 02:06:26,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (2/3) ... [2021-11-23 02:06:26,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2915b844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:26, skipping insertion in model container [2021-11-23 02:06:26,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:26" (3/3) ... [2021-11-23 02:06:26,772 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_2.i [2021-11-23 02:06:26,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:06:26,779 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:06:26,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:06:26,848 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:06:26,849 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:06:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:06:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:06:26,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:26,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:06:26,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash -592026431, now seen corresponding path program 1 times [2021-11-23 02:06:26,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:26,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191446920] [2021-11-23 02:06:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:26,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:27,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:06:27,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945247259] [2021-11-23 02:06:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:27,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:27,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:27,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:06:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:06:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:27,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:06:27,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:27,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191446920] [2021-11-23 02:06:27,352 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:06:27,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945247259] [2021-11-23 02:06:27,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945247259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:27,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:27,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:06:27,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49783451] [2021-11-23 02:06:27,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:27,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:27,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:27,422 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-23 02:06:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:27,502 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-11-23 02:06:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:27,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-23 02:06:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:27,532 INFO L225 Difference]: With dead ends: 34 [2021-11-23 02:06:27,533 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:06:27,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:27,541 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:27,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:06:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 02:06:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:06:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-23 02:06:27,590 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2021-11-23 02:06:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:27,590 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-23 02:06:27,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-23 02:06:27,591 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-23 02:06:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:06:27,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:27,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:27,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:27,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 02:06:27,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:27,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1175005777, now seen corresponding path program 1 times [2021-11-23 02:06:27,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:27,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21535968] [2021-11-23 02:06:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:27,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:27,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:06:27,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090691253] [2021-11-23 02:06:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:27,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:27,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:27,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:27,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:06:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:06:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:28,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:28,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:28,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21535968] [2021-11-23 02:06:28,202 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:06:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090691253] [2021-11-23 02:06:28,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090691253] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034372507] [2021-11-23 02:06:28,250 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 02:06:28,250 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:28,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:28,270 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:28,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:28,610 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:28,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|) 1 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main1_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:28,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:28,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:06:28,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-23 02:06:28,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282939177] [2021-11-23 02:06:28,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:28,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:06:28,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:06:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:06:28,962 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:06:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:29,068 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-11-23 02:06:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:29,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:06:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:29,070 INFO L225 Difference]: With dead ends: 25 [2021-11-23 02:06:29,070 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 02:06:29,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:06:29,077 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:29,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 85 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 02:06:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-23 02:06:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:06:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-23 02:06:29,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2021-11-23 02:06:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:29,096 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-23 02:06:29,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:06:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-23 02:06:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:06:29,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:29,099 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:29,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:29,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:29,314 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2067496319, now seen corresponding path program 2 times [2021-11-23 02:06:29,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:29,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888795104] [2021-11-23 02:06:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:29,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:29,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:06:29,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108378990] [2021-11-23 02:06:29,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:06:29,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:29,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:29,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:29,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:06:39,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:06:39,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:39,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 02:06:39,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:33,669 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (< |ULTIMATE.start_main1_~x~0#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)))) is different from false [2021-11-23 02:09:01,443 WARN L227 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:09:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 02:09:05,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:22,399 WARN L227 SmtUtils]: Spent 36.14s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:11:32,013 WARN L227 SmtUtils]: Spent 28.07s 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) [2021-11-23 02:12:51,441 WARN L227 SmtUtils]: Spent 5.27s 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) [2021-11-23 02:12:55,479 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_12| Int) (|v_ULTIMATE.start_main1_~x~0#1_7| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_7| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 0) (= .cse0 0) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256) 0)) (<= |v_ULTIMATE.start_main1_~y~0#1_12| 0) (not (= (mod |v_ULTIMATE.start_main1_~x~0#1_7| |v_ULTIMATE.start_main1_~y~0#1_12|) 0))))) is different from false [2021-11-23 02:12:57,482 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_12| Int) (|v_ULTIMATE.start_main1_~x~0#1_7| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_7| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 0) (= .cse0 0) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256) 0)) (<= |v_ULTIMATE.start_main1_~y~0#1_12| 0) (not (= (mod |v_ULTIMATE.start_main1_~x~0#1_7| |v_ULTIMATE.start_main1_~y~0#1_12|) 0))))) is different from true [2021-11-23 02:12:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:57,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:57,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888795104] [2021-11-23 02:12:57,483 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:12:57,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108378990] [2021-11-23 02:12:57,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108378990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:57,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [799562370] [2021-11-23 02:12:57,487 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 02:12:57,487 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:12:57,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:12:57,487 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:12:57,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:12:57,622 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:13:17,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '292#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|) 1 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main1_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:13:17,073 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:13:17,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:13:17,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-23 02:13:17,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159225715] [2021-11-23 02:13:17,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:13:17,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:13:17,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:13:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=157, Unknown=18, NotChecked=54, Total=272 [2021-11-23 02:13:17,076 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-11-23 02:13:19,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:14:39,599 WARN L227 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 43 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:14:41,787 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse35 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse36 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse35) 256))) (let ((.cse24 (+ 256 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse37 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse35) 256)) (.cse12 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse32 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse36) 256) 0))) (.cse33 (= |c_ULTIMATE.start_main1_~y~0#1| .cse36)) (.cse34 (= .cse36 0))) (let ((.cse23 (or .cse12 .cse32 .cse33 .cse34)) (.cse11 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse37) 256) 0))) (.cse13 (= .cse37 0)) (.cse14 (= .cse37 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse15 (< 127 .cse37)) (.cse16 (<= .cse37 127)) (.cse4 (<= .cse36 127)) (.cse8 (< 127 .cse36)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse37)) 256) 0))) (.cse19 (= .cse37 .cse24)) (.cse22 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse20 (= .cse24 .cse36)) (.cse21 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse36)) 256)))) (.cse26 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse25 (mod .cse35 256))) (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)) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (or (and (< |ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse3 (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256))) (or (and (<= .cse3 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) (and (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse3) (< 127 .cse3))))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~x~0#1|) (<= 0 |ULTIMATE.start_main1_~x~0#1|))) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0))) (= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~y~0#1|) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (or (let ((.cse10 (or (= .cse24 .cse25) .cse26 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse25)) 256) 0))))) (let ((.cse7 (or (and .cse10 .cse23) .cse22)) (.cse6 (or (and .cse10 (or .cse12 .cse20 .cse21)) .cse22))) (and (or (let ((.cse5 (or .cse9 (and .cse10 (or .cse11 .cse12 .cse13 .cse14))))) (and (or .cse4 (and .cse5 .cse6)) (or (and .cse5 .cse7) .cse8))) .cse15) (or .cse16 (let ((.cse17 (or .cse9 (and .cse10 (or .cse12 .cse18 .cse19))))) (and (or (and .cse17 .cse7) .cse8) (or .cse4 (and .cse6 .cse17)))))))) (<= .cse25 127)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (< 127 .cse25) (let ((.cse29 (or .cse26 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse25) 256) 0)) (= |c_ULTIMATE.start_main1_~y~0#1| .cse25) (= 0 .cse25))) (.cse30 (= .cse35 0))) (let ((.cse27 (or .cse22 (and .cse29 (or .cse12 .cse20 .cse21 .cse30))))) (and (or (let ((.cse28 (or .cse9 (and .cse29 (or .cse11 .cse12 .cse13 .cse14 .cse30))))) (and (or .cse4 (and .cse27 .cse28)) (or (and (or (and .cse29 .cse23) .cse22) .cse28) .cse8))) .cse15) (or .cse16 (let ((.cse31 (or .cse9 (and (or .cse12 .cse18 .cse19 .cse30) .cse29)))) (and (or .cse4 (and .cse31 .cse27)) (or (and (or .cse22 (and (or .cse12 .cse32 .cse33 .cse34 .cse30) .cse29)) .cse31) .cse8))))))))))))) is different from false [2021-11-23 02:14:43,799 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse35 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse36 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse35) 256))) (let ((.cse24 (+ 256 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse37 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse35) 256)) (.cse12 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse32 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse36) 256) 0))) (.cse33 (= |c_ULTIMATE.start_main1_~y~0#1| .cse36)) (.cse34 (= .cse36 0))) (let ((.cse23 (or .cse12 .cse32 .cse33 .cse34)) (.cse11 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse37) 256) 0))) (.cse13 (= .cse37 0)) (.cse14 (= .cse37 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse15 (< 127 .cse37)) (.cse16 (<= .cse37 127)) (.cse4 (<= .cse36 127)) (.cse8 (< 127 .cse36)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse37)) 256) 0))) (.cse19 (= .cse37 .cse24)) (.cse22 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse20 (= .cse24 .cse36)) (.cse21 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse36)) 256)))) (.cse26 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse25 (mod .cse35 256))) (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)) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (or (and (< |ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse3 (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256))) (or (and (<= .cse3 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) (and (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse3) (< 127 .cse3))))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~x~0#1|) (<= 0 |ULTIMATE.start_main1_~x~0#1|))) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0))) (= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~y~0#1|) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (or (let ((.cse10 (or (= .cse24 .cse25) .cse26 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse25)) 256) 0))))) (let ((.cse7 (or (and .cse10 .cse23) .cse22)) (.cse6 (or (and .cse10 (or .cse12 .cse20 .cse21)) .cse22))) (and (or (let ((.cse5 (or .cse9 (and .cse10 (or .cse11 .cse12 .cse13 .cse14))))) (and (or .cse4 (and .cse5 .cse6)) (or (and .cse5 .cse7) .cse8))) .cse15) (or .cse16 (let ((.cse17 (or .cse9 (and .cse10 (or .cse12 .cse18 .cse19))))) (and (or (and .cse17 .cse7) .cse8) (or .cse4 (and .cse6 .cse17)))))))) (<= .cse25 127)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (< 127 .cse25) (let ((.cse29 (or .cse26 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse25) 256) 0)) (= |c_ULTIMATE.start_main1_~y~0#1| .cse25) (= 0 .cse25))) (.cse30 (= .cse35 0))) (let ((.cse27 (or .cse22 (and .cse29 (or .cse12 .cse20 .cse21 .cse30))))) (and (or (let ((.cse28 (or .cse9 (and .cse29 (or .cse11 .cse12 .cse13 .cse14 .cse30))))) (and (or .cse4 (and .cse27 .cse28)) (or (and (or (and .cse29 .cse23) .cse22) .cse28) .cse8))) .cse15) (or .cse16 (let ((.cse31 (or .cse9 (and (or .cse12 .cse18 .cse19 .cse30) .cse29)))) (and (or .cse4 (and .cse31 .cse27)) (or (and (or .cse22 (and (or .cse12 .cse32 .cse33 .cse34 .cse30) .cse29)) .cse31) .cse8))))))))))))) is different from true [2021-11-23 02:15:33,931 WARN L227 SmtUtils]: Spent 43.50s on a formula simplification. DAG size of input: 50 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:15:35,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 02:15:36,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 02:15:38,407 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (or (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (< |ULTIMATE.start_main1_~x~0#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)))) is different from false [2021-11-23 02:15:40,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 02:15:42,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 02:15:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:42,578 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-23 02:15:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:15:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 8 [2021-11-23 02:15:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:42,580 INFO L225 Difference]: With dead ends: 26 [2021-11-23 02:15:42,580 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 02:15:42,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 252.6s TimeCoverageRelationStatistics Valid=56, Invalid=204, Unknown=28, NotChecked=132, Total=420 [2021-11-23 02:15:42,582 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:42,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 3 Unknown, 39 Unchecked, 9.2s Time] [2021-11-23 02:15:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 02:15:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 02:15:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:15:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-23 02:15:42,591 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 8 [2021-11-23 02:15:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:42,591 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-23 02:15:42,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-11-23 02:15:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-23 02:15:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:15:42,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:42,593 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:42,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:42,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:42,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 330067951, now seen corresponding path program 3 times [2021-11-23 02:15:42,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:42,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715424598] [2021-11-23 02:15:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:42,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:42,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:15:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772811616] [2021-11-23 02:15:42,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:15:42,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:42,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:42,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:42,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479ac088-e603-4948-aa2e-9ee1f2ef7a13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:15:54,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:15:54,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:15:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 02:15:54,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:01,076 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~x~0#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (and (< |ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (= (mod |ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false