./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_2.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_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/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_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/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_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/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 a4130d48586bacb8e01e8525ec6ffcd9f272030d26882b368d1c87de47eeb037 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:12:01,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:12:01,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:12:01,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:12:01,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:12:01,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:12:01,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:12:01,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:12:01,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:12:01,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:12:01,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:12:01,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:12:01,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:12:01,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:12:01,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:12:01,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:12:01,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:12:01,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:12:01,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:12:01,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:12:01,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:12:01,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:12:01,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:12:01,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:12:01,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:12:01,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:12:01,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:12:01,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:12:01,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:12:01,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:12:01,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:12:01,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:12:01,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:12:01,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:12:01,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:12:01,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:12:01,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:12:01,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:12:01,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:12:01,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:12:01,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:12:01,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:12:01,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:12:01,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:12:01,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:12:01,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:12:01,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:12:01,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:12:01,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:12:01,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:12:01,347 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:12:01,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:12:01,348 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:12:01,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:12:01,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:12:01,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:12:01,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:12:01,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:12:01,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:12:01,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:12:01,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:12:01,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:12:01,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:12:01,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:12:01,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:12:01,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:12:01,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:12:01,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:12:01,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:12:01,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:12:01,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:12:01,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:12:01,350 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:12:01,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:12:01,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:12:01,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:12:01,351 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_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4130d48586bacb8e01e8525ec6ffcd9f272030d26882b368d1c87de47eeb037 [2021-12-07 00:12:01,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:12:01,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:12:01,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:12:01,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:12:01,546 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:12:01,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_3+newton_2_2.i [2021-12-07 00:12:01,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/data/ef9cab404/31be7585137c4d2796e79a4b39c52318/FLAGf2f3d20af [2021-12-07 00:12:01,978 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:12:01,978 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i [2021-12-07 00:12:01,983 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/data/ef9cab404/31be7585137c4d2796e79a4b39c52318/FLAGf2f3d20af [2021-12-07 00:12:01,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/data/ef9cab404/31be7585137c4d2796e79a4b39c52318 [2021-12-07 00:12:01,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:12:01,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:12:01,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:12:01,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:12:02,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:12:02,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:12:01" (1/1) ... [2021-12-07 00:12:02,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17fa78b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02, skipping insertion in model container [2021-12-07 00:12:02,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:12:01" (1/1) ... [2021-12-07 00:12:02,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:12:02,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:12:02,135 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_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[1226,1239] [2021-12-07 00:12:02,159 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_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[2841,2854] [2021-12-07 00:12:02,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:12:02,167 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:12:02,177 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_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[1226,1239] [2021-12-07 00:12:02,189 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_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/sv-benchmarks/c/combinations/gcd_3+newton_2_2.i[2841,2854] [2021-12-07 00:12:02,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:12:02,204 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:12:02,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02 WrapperNode [2021-12-07 00:12:02,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:12:02,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:12:02,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:12:02,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:12:02,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,240 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-07 00:12:02,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:12:02,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:12:02,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:12:02,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:12:02,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:12:02,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:12:02,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:12:02,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:12:02,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (1/1) ... [2021-12-07 00:12:02,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:12:02,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:02,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:12:02,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:12:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:12:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-07 00:12:02,322 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-07 00:12:02,322 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-07 00:12:02,322 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-07 00:12:02,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:12:02,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:12:02,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:12:02,370 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:12:02,371 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:12:02,469 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:12:02,474 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:12:02,474 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:12:02,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:12:02 BoogieIcfgContainer [2021-12-07 00:12:02,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:12:02,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:12:02,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:12:02,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:12:02,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:12:01" (1/3) ... [2021-12-07 00:12:02,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56aab308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:12:02, skipping insertion in model container [2021-12-07 00:12:02,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:02" (2/3) ... [2021-12-07 00:12:02,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56aab308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:12:02, skipping insertion in model container [2021-12-07 00:12:02,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:12:02" (3/3) ... [2021-12-07 00:12:02,482 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_2.i [2021-12-07 00:12:02,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:12:02,486 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-07 00:12:02,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:12:02,526 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 [2021-12-07 00:12:02,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-07 00:12:02,539 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) [2021-12-07 00:12:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:12:02,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:02,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:02,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-07 00:12:02,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:02,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186773576] [2021-12-07 00:12:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:02,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:02,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:02,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186773576] [2021-12-07 00:12:02,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186773576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:02,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:02,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:12:02,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926364566] [2021-12-07 00:12:02,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:02,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:12:02,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:12:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:12:02,723 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) [2021-12-07 00:12:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:02,770 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-07 00:12:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:12:02,773 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 [2021-12-07 00:12:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:02,778 INFO L225 Difference]: With dead ends: 90 [2021-12-07 00:12:02,779 INFO L226 Difference]: Without dead ends: 36 [2021-12-07 00:12:02,782 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 [2021-12-07 00:12:02,786 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 [2021-12-07 00:12:02,787 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] [2021-12-07 00:12:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-07 00:12:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-07 00:12:02,817 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) [2021-12-07 00:12:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-07 00:12:02,820 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-12-07 00:12:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:02,820 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-07 00:12:02,821 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) [2021-12-07 00:12:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-07 00:12:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:12:02,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:02,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:02,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:12:02,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:02,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-07 00:12:02,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:02,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795256589] [2021-12-07 00:12:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:02,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:02,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795256589] [2021-12-07 00:12:02,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795256589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:02,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:02,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:12:02,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841226718] [2021-12-07 00:12:02,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:02,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:12:02,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:02,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:12:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:12:02,900 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) [2021-12-07 00:12:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:02,948 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-07 00:12:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:12:02,949 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 [2021-12-07 00:12:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:02,950 INFO L225 Difference]: With dead ends: 36 [2021-12-07 00:12:02,950 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 00:12:02,951 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 [2021-12-07 00:12:02,952 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 [2021-12-07 00:12:02,953 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] [2021-12-07 00:12:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 00:12:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-07 00:12:02,959 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) [2021-12-07 00:12:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-07 00:12:02,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-07 00:12:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:02,960 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-07 00:12:02,961 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) [2021-12-07 00:12:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-07 00:12:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:12:02,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:02,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:02,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:12:02,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:02,963 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-07 00:12:02,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:02,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613621315] [2021-12-07 00:12:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:02,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:02,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:12:02,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477333761] [2021-12-07 00:12:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:02,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:02,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:02,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:12:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:03,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:12:03,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:37,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:46,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613621315] [2021-12-07 00:12:46,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:12:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477333761] [2021-12-07 00:12:46,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477333761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:46,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:12:46,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-07 00:12:46,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734685657] [2021-12-07 00:12:46,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:46,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:12:46,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:12:46,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=206, Unknown=12, NotChecked=0, Total=272 [2021-12-07 00:12:46,246 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) [2021-12-07 00:12:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:12:51,912 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-07 00:12:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:12:51,912 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 [2021-12-07 00:12:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:12:51,913 INFO L225 Difference]: With dead ends: 42 [2021-12-07 00:12:51,913 INFO L226 Difference]: Without dead ends: 33 [2021-12-07 00:12:51,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=74, Invalid=254, Unknown=14, NotChecked=0, Total=342 [2021-12-07 00:12:51,915 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 [2021-12-07 00:12:51,915 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] [2021-12-07 00:12:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-07 00:12:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-07 00:12:51,919 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) [2021-12-07 00:12:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-07 00:12:51,919 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-07 00:12:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:12:51,920 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-07 00:12:51,920 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) [2021-12-07 00:12:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-07 00:12:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:12:51,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:12:51,921 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:51,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:12:52,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:52,123 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:12:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-12-07 00:12:52,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:52,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691069176] [2021-12-07 00:12:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:52,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:52,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:12:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465619054] [2021-12-07 00:12:52,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:12:52,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:52,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:52,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:52,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:12:52,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:12:52,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:52,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 00:12:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:53,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:32,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:32,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691069176] [2021-12-07 00:13:32,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:13:32,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465619054] [2021-12-07 00:13:32,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465619054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:32,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:13:32,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-07 00:13:32,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652897316] [2021-12-07 00:13:32,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:32,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 00:13:32,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 00:13:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=179, Unknown=12, NotChecked=0, Total=240 [2021-12-07 00:13:32,003 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) [2021-12-07 00:13:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:13:32,127 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-07 00:13:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:13:32,128 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 [2021-12-07 00:13:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:13:32,129 INFO L225 Difference]: With dead ends: 43 [2021-12-07 00:13:32,129 INFO L226 Difference]: Without dead ends: 34 [2021-12-07 00:13:32,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=49, Invalid=179, Unknown=12, NotChecked=0, Total=240 [2021-12-07 00:13:32,130 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:13:32,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-07 00:13:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-07 00:13:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-07 00:13:32,134 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) [2021-12-07 00:13:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-07 00:13:32,135 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-12-07 00:13:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:13:32,136 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-07 00:13:32,136 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) [2021-12-07 00:13:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-07 00:13:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:13:32,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:13:32,137 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:32,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:13:32,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:32,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:13:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-12-07 00:13:32,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:32,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084946408] [2021-12-07 00:13:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:32,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:32,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:13:32,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059180265] [2021-12-07 00:13:32,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:13:32,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:32,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:32,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:32,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:13:32,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:13:32,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:32,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-07 00:13:32,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:50,865 WARN L227 SmtUtils]: Spent 7.31s 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) [2021-12-07 00:14:15,587 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 [2021-12-07 00:14:18,980 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)) (= (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 [2021-12-07 00:15:01,215 WARN L227 SmtUtils]: Spent 26.47s on a formula simplification. DAG size of input: 59 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:15:25,443 WARN L227 SmtUtils]: Spent 14.57s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:15:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-07 00:15:32,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:16:56,715 WARN L227 SmtUtils]: Spent 1.01m 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) [2021-12-07 00:18:44,795 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse18 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256))) (let ((.cse27 (+ (- 256) .cse24))) (let ((.cse25 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256)) (.cse26 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256))) (let ((.cse3 (not (= (mod (mod .cse27 .cse26) 256) 0))) (.cse5 (<= .cse26 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse13 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (= .cse24 0)) (.cse10 (not (= (mod (mod .cse24 .cse25) 256) 0))) (.cse11 (<= .cse25 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse12 (or .cse4 .cse9 .cse10 .cse11)) (.cse14 (< 127 .cse24)) (.cse8 (<= .cse13 127)) (.cse1 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse7 (or .cse3 .cse4 .cse5)) (.cse0 (<= .cse24 127)) (.cse17 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse16 (mod .cse18 256))) (and (or (let ((.cse6 (= .cse18 0)) (.cse2 (let ((.cse15 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16) 256))) (or (<= .cse15 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse16 .cse15) 256) 0)) .cse17 (= 0 .cse16))))) (and (or .cse0 (and (or .cse1 (and .cse2 (or .cse3 .cse4 .cse5 .cse6))) (or (and .cse7 .cse2) .cse1 .cse8))) (or (and (or (and (or .cse4 .cse9 .cse10 .cse11 .cse6) .cse2) .cse1) (or .cse1 (and .cse12 .cse2) (< 127 .cse13))) .cse14))) (< 127 .cse16)) (or (<= .cse16 127) (let ((.cse20 (let ((.cse22 (+ (- 256) .cse16))) (let ((.cse23 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256))) (or (not (= (mod (mod .cse22 .cse23) 256) 0)) .cse17 (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (let ((.cse19 (and .cse12 .cse20))) (and (or .cse1 .cse8 .cse19) (or .cse1 .cse19))) .cse14) (or (let ((.cse21 (and .cse7 .cse20))) (and (or .cse21 .cse1 .cse8) (or .cse21 .cse1))) .cse0)))))))))))) is different from true [2021-12-07 00:19:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-07 00:19:41,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:19:41,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084946408] [2021-12-07 00:19:41,828 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:19:41,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059180265] [2021-12-07 00:19:41,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059180265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:19:41,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:19:41,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-07 00:19:41,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718688224] [2021-12-07 00:19:41,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:19:41,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:19:41,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:19:41,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:19:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=227, Unknown=18, NotChecked=102, Total=420 [2021-12-07 00:19:41,830 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) [2021-12-07 00:19:43,906 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|))) (and .cse0 (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~x~0#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))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| .cse1) (<= .cse1 127)))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse2 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (and (< 127 .cse2) (= .cse2 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)))))) (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse20 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse20) 256))) (let ((.cse29 (+ (- 256) .cse26))) (let ((.cse27 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse26) 256)) (.cse28 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256))) (let ((.cse6 (not (= (mod (mod .cse29 .cse28) 256) 0))) (.cse7 (<= .cse28 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse15 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse20) 256)) (.cse11 (= .cse26 0)) (.cse12 (not (= (mod (mod .cse26 .cse27) 256) 0))) (.cse13 (<= .cse27 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse14 (or .cse0 .cse11 .cse12 .cse13)) (.cse16 (< 127 .cse26)) (.cse10 (<= .cse15 127)) (.cse4 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (or .cse6 .cse0 .cse7)) (.cse3 (<= .cse26 127)) (.cse19 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse18 (mod .cse20 256))) (and (or (let ((.cse8 (= .cse20 0)) (.cse5 (let ((.cse17 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256))) (or (<= .cse17 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse18 .cse17) 256) 0)) .cse19 (= 0 .cse18))))) (and (or .cse3 (and (or .cse4 (and .cse5 (or .cse6 .cse0 .cse7 .cse8))) (or (and .cse9 .cse5) .cse4 .cse10))) (or (and (or (and (or .cse0 .cse11 .cse12 .cse13 .cse8) .cse5) .cse4) (or .cse4 (and .cse14 .cse5) (< 127 .cse15))) .cse16))) (< 127 .cse18)) (or (<= .cse18 127) (let ((.cse22 (let ((.cse24 (+ (- 256) .cse18))) (let ((.cse25 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256))) (or (not (= (mod (mod .cse24 .cse25) 256) 0)) .cse19 (<= .cse25 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (let ((.cse21 (and .cse14 .cse22))) (and (or .cse4 .cse10 .cse21) (or .cse4 .cse21))) .cse16) (or (let ((.cse23 (and .cse9 .cse22))) (and (or .cse23 .cse4 .cse10) (or .cse23 .cse4))) .cse3)))))))))))))) is different from true [2021-12-07 00:20:04,458 WARN L227 SmtUtils]: Spent 17.65s 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) [2021-12-07 00:20:05,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:20:10,396 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= |c_ULTIMATE.start_main1_~x~0#1| 0))) (and (or .cse0 (<= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~x~0#1|) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (< 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 (= |c_ULTIMATE.start_gcd_test_~b#1| 0))) (or (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse2 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse2) 256))) (and (not (= .cse1 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse1 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod .cse2 .cse1) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse2 127))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse5) 256))) (let ((.cse4 (mod .cse3 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (not (= .cse3 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse4 256)) (= (mod (mod .cse5 .cse3) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (<= .cse5 127) (= .cse4 0)))))))) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse6 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse10 (+ .cse6 (- 256)))) (let ((.cse9 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse10) 256))) (let ((.cse7 (mod .cse9 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse8 (mod .cse10 .cse9))) (and (< 127 .cse6) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse7 256)) (not (= .cse8 0)) (not (= .cse9 0)) (= .cse7 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse9 255) .cse8) 256)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse11 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse14 (+ .cse11 (- 256)))) (let ((.cse12 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse14) 256))) (let ((.cse13 (mod .cse14 .cse12))) (and (< 127 .cse11) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse13 0)) (not (= .cse12 0)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) (mod (+ (* .cse12 255) .cse13) 256))))))))) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)))) is different from false [2021-12-07 00:20:13,052 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 [2021-12-07 00:20:47,219 WARN L227 SmtUtils]: Spent 29.25s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:21:32,311 WARN L227 SmtUtils]: Spent 43.15s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:22:18,996 WARN L227 SmtUtils]: Spent 42.94s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:22:53,211 WARN L227 SmtUtils]: Spent 31.48s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:22:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:22:53,224 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-07 00:22:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 00:22:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-07 00:22:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:22:53,225 INFO L225 Difference]: With dead ends: 49 [2021-12-07 00:22:53,225 INFO L226 Difference]: Without dead ends: 39 [2021-12-07 00:22:53,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 367.0s TimeCoverageRelationStatistics Valid=147, Invalid=407, Unknown=22, NotChecked=294, Total=870 [2021-12-07 00:22:53,226 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:22:53,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 265 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 95 Unchecked, 1.8s Time] [2021-12-07 00:22:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-07 00:22:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-12-07 00:22:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 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) [2021-12-07 00:22:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-12-07 00:22:53,230 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 14 [2021-12-07 00:22:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:22:53,230 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-12-07 00:22:53,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:22:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-12-07 00:22:53,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-07 00:22:53,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:22:53,231 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:22:53,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:22:53,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:22:53,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:22:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:22:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash 571830174, now seen corresponding path program 4 times [2021-12-07 00:22:53,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:22:53,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841738774] [2021-12-07 00:22:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:22:53,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:22:53,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:22:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800075405] [2021-12-07 00:22:53,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:22:53,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:22:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:22:53,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:22:53,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1274ddc3-19d7-4ef5-a4b7-c188e0fdfb8d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:22:53,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:22:53,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:22:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-07 00:22:53,561 INFO L286 TraceCheckSpWp]: Computing forward predicates...