./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y --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 353cc018d334cc7a981957992a6877492a13119a8e3524540eab203ce1072cbf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:53:55,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:53:55,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:53:55,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:53:55,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:53:55,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:53:55,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:53:55,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:53:55,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:53:55,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:53:55,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:53:55,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:53:55,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:53:55,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:53:55,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:53:55,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:53:55,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:53:55,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:53:55,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:53:55,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:53:55,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:53:55,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:53:55,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:53:55,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:53:55,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:53:55,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:53:55,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:53:55,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:53:55,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:53:55,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:53:55,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:53:55,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:53:55,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:53:55,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:53:55,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:53:55,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:53:55,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:53:55,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:53:55,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:53:55,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:53:55,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:53:55,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:53:55,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:53:55,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:53:55,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:53:55,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:53:55,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:53:55,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:53:55,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:53:55,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:53:55,720 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:53:55,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:53:55,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:53:55,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:53:55,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:53:55,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:53:55,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:53:55,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:53:55,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:53:55,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:53:55,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:53:55,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:53:55,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:53:55,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:53:55,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:53:55,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:53:55,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:53:55,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:53:55,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:53:55,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:53:55,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:53:55,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:53:55,725 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:53:55,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:53:55,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:53:55,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:53:55,726 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_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 353cc018d334cc7a981957992a6877492a13119a8e3524540eab203ce1072cbf [2021-11-13 18:53:56,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:53:56,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:53:56,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:53:56,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:53:56,052 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:53:56,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i [2021-11-13 18:53:56,124 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/data/4b4247c14/e7de5cd8701b4bc889c96708357673bf/FLAG16cd5841d [2021-11-13 18:53:56,620 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:53:56,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i [2021-11-13 18:53:56,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/data/4b4247c14/e7de5cd8701b4bc889c96708357673bf/FLAG16cd5841d [2021-11-13 18:53:56,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/data/4b4247c14/e7de5cd8701b4bc889c96708357673bf [2021-11-13 18:53:56,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:53:56,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:53:56,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:53:56,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:53:56,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:53:56,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:53:56" (1/1) ... [2021-11-13 18:53:56,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1f5982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:56, skipping insertion in model container [2021-11-13 18:53:56,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:53:56" (1/1) ... [2021-11-13 18:53:57,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:53:57,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:53:57,203 WARN L228 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_a6b1ac34-9a6d-46be-bae3-f05fd004b006/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[1226,1239] [2021-11-13 18:53:57,229 WARN L228 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_a6b1ac34-9a6d-46be-bae3-f05fd004b006/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[2828,2841] [2021-11-13 18:53:57,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:53:57,239 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:53:57,251 WARN L228 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_a6b1ac34-9a6d-46be-bae3-f05fd004b006/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[1226,1239] [2021-11-13 18:53:57,264 WARN L228 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_a6b1ac34-9a6d-46be-bae3-f05fd004b006/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[2828,2841] [2021-11-13 18:53:57,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:53:57,279 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:53:57,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57 WrapperNode [2021-11-13 18:53:57,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:53:57,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:53:57,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:53:57,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:53:57,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:53:57,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:53:57,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:53:57,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:53:57,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:53:57,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:53:57,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:53:57,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:53:57,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (1/1) ... [2021-11-13 18:53:57,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:53:57,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:57,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:53:57,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:53:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-13 18:53:57,452 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-13 18:53:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:53:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-13 18:53:57,454 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-13 18:53:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:53:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:53:57,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:53:57,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:53:57,700 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:53:57,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:53:57 BoogieIcfgContainer [2021-11-13 18:53:57,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:53:57,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:53:57,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:53:57,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:53:57,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:53:56" (1/3) ... [2021-11-13 18:53:57,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3555428a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:53:57, skipping insertion in model container [2021-11-13 18:53:57,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:53:57" (2/3) ... [2021-11-13 18:53:57,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3555428a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:53:57, skipping insertion in model container [2021-11-13 18:53:57,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:53:57" (3/3) ... [2021-11-13 18:53:57,714 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_1.i [2021-11-13 18:53:57,719 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:53:57,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:53:57,806 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:53:57,830 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:53:57,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:53:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:53:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:53:57,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:57,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:57,862 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:57,874 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2021-11-13 18:53:57,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:57,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025126454] [2021-11-13 18:53:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:57,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:58,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:53:58,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242765801] [2021-11-13 18:53:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:58,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:58,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:58,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:58,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:53:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 18:53:58,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:58,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:53:58,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:58,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025126454] [2021-11-13 18:53:58,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:53:58,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242765801] [2021-11-13 18:53:58,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242765801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:58,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:58,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:53:58,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352585860] [2021-11-13 18:53:58,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:58,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:53:58,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:53:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:53:58,282 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:58,305 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-11-13 18:53:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:53:58,307 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:53:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:58,314 INFO L225 Difference]: With dead ends: 72 [2021-11-13 18:53:58,314 INFO L226 Difference]: Without dead ends: 32 [2021-11-13 18:53:58,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:53:58,331 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:58,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:53:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-13 18:53:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-13 18:53:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:53:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-13 18:53:58,383 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2021-11-13 18:53:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:58,383 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-13 18:53:58,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-13 18:53:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:53:58,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:58,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:58,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:58,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-13 18:53:58,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2021-11-13 18:53:58,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:58,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161415754] [2021-11-13 18:53:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:58,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:58,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:53:58,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304701518] [2021-11-13 18:53:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:58,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:58,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:58,633 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:58,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:53:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:53:58,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:58,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:53:58,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:58,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161415754] [2021-11-13 18:53:58,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:53:58,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304701518] [2021-11-13 18:53:58,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304701518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:58,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:58,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:53:58,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320399898] [2021-11-13 18:53:58,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:58,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:53:58,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:53:58,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:53:58,800 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:58,826 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-13 18:53:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:53:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:53:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:58,834 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:53:58,834 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 18:53:58,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:53:58,838 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.84ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:58,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 5.84ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 8.09ms Time] [2021-11-13 18:53:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 18:53:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-13 18:53:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:53:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-13 18:53:58,854 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-11-13 18:53:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:58,854 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-13 18:53:58,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:58,854 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-13 18:53:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:53:58,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:58,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:58,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:59,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:59,079 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2021-11-13 18:53:59,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:59,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600139734] [2021-11-13 18:53:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:59,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:59,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:53:59,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850492040] [2021-11-13 18:53:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:59,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:59,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:59,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:59,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:53:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:53:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:59,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:59,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:59,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600139734] [2021-11-13 18:53:59,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:53:59,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850492040] [2021-11-13 18:53:59,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850492040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:59,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:53:59,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-13 18:53:59,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900450417] [2021-11-13 18:53:59,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:59,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:53:59,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:59,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:53:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:53:59,400 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:59,469 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-13 18:53:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:53:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 18:53:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:59,471 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:53:59,471 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 18:53:59,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:59,472 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:59,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 153 Invalid, 32 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 35.26ms Time] [2021-11-13 18:53:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 18:53:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-13 18:53:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:53:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-13 18:53:59,479 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-11-13 18:53:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:59,479 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-13 18:53:59,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-13 18:53:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:53:59,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:59,480 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:59,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:59,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:59,707 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:59,707 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2021-11-13 18:53:59,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:59,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235225211] [2021-11-13 18:53:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:59,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:59,724 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:53:59,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50662040] [2021-11-13 18:53:59,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:53:59,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:59,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:59,734 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:59,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:54:05,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:54:05,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 18:54:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:57:20,957 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-13 18:58:03,153 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-13 18:58:58,784 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-13 18:59:41,809 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-13 18:59:43,813 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true [2021-11-13 19:00:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-13 19:00:23,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 19:00:53,187 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse21 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse27 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256))) (let ((.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse27) 256) 0))) (.cse6 (= .cse27 0)) (.cse28 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse21) 256))) (let ((.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0))) (.cse13 (<= .cse28 127)) (.cse10 (< 127 .cse27)) (.cse1 (<= .cse27 127)) (.cse11 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse17 (= .cse28 0)) (.cse18 (< 127 .cse28)) (.cse19 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse27)) 256)))) (.cse9 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse15 (or .cse4 .cse5 .cse6)) (.cse20 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse0 (mod .cse21 256))) (and (or (< 127 .cse0) (let ((.cse7 (= .cse21 0))) (let ((.cse8 (or (and (not .cse7) .cse20) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse0) 256) 0)) (= 0 .cse0)))) (let ((.cse3 (or (and (or .cse4 .cse19 .cse7) .cse8) .cse9))) (and (or (let ((.cse2 (or .cse11 (and .cse8 (or .cse4 .cse12 .cse7))))) (and (or .cse1 (and .cse2 .cse3)) (or (and .cse2 (or (and (or .cse4 .cse5 .cse6 .cse7) .cse8) .cse9)) .cse10))) .cse13) (or (let ((.cse14 (or .cse11 (and .cse8 (or .cse16 .cse4 .cse17 .cse7))))) (and (or .cse1 (and .cse14 .cse3)) (or (and .cse14 (or .cse9 (and .cse15 .cse8))) .cse10))) .cse18)))))) (or (<= .cse0 127) (let ((.cse25 (or .cse20 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse0)) 256) 0))))) (let ((.cse23 (or .cse9 (and .cse25 .cse15))) (.cse24 (or .cse9 (and .cse25 (or .cse4 .cse19))))) (and (or (let ((.cse22 (or (and (or .cse4 .cse12) .cse25) .cse11))) (and (or (and .cse22 .cse23) .cse10) (or .cse1 (and .cse22 .cse24)))) .cse13) (or (let ((.cse26 (or .cse11 (and .cse25 (or .cse16 .cse4 .cse17))))) (and (or (and .cse26 .cse23) .cse10) (or .cse1 (and .cse26 .cse24)))) .cse18)))))))))) is different from true [2021-11-13 19:01:13,252 WARN L227 SmtUtils]: Spent 7.53s 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) [2021-11-13 19:01:32,472 WARN L227 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 44 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 19:02:24,103 WARN L227 SmtUtils]: Spent 22.78s 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) [2021-11-13 19:03:48,948 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from true [2021-11-13 19:04:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-13 19:04:29,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 19:04:29,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235225211] [2021-11-13 19:04:29,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 19:04:29,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50662040] [2021-11-13 19:04:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50662040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 19:04:29,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 19:04:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-11-13 19:04:29,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118511183] [2021-11-13 19:04:29,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 19:04:29,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 19:04:29,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 19:04:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 19:04:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=123, Unknown=16, NotChecked=162, Total=342 [2021-11-13 19:04:29,991 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 19:05:22,788 WARN L227 SmtUtils]: Spent 45.61s 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) [2021-11-13 19:05:24,852 WARN L838 $PredicateComparison]: unable to prove that (and (or (let ((.cse1 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (= .cse0 0) (< 127 .cse1) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0)))) (let ((.cse2 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_main1_~y~0#1|))) (or (<= .cse1 127) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main1_~y~0#1| 255) .cse2) 256) (- 256))) 256) 0)) (= .cse2 0))))) (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 0)) (or (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (let ((.cse4 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (and (let ((.cse3 (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (= .cse3 0) (< 127 .cse4) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse3) 256) 0)))) (or (<= .cse4 127) (let ((.cse6 (mod (+ (- 256) .cse4) |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse6) 256))) (and (or (< 127 .cse5) (= .cse5 0)) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse5)) 256) 0)) (<= .cse5 127) (= .cse6 0)))))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2021-11-13 19:05:26,857 WARN L860 $PredicateComparison]: unable to prove that (and (or (let ((.cse1 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (= .cse0 0) (< 127 .cse1) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0)))) (let ((.cse2 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_main1_~y~0#1|))) (or (<= .cse1 127) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main1_~y~0#1| 255) .cse2) 256) (- 256))) 256) 0)) (= .cse2 0))))) (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 0)) (or (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (let ((.cse4 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (and (let ((.cse3 (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (= .cse3 0) (< 127 .cse4) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse3) 256) 0)))) (or (<= .cse4 127) (let ((.cse6 (mod (+ (- 256) .cse4) |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse5 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse6) 256))) (and (or (< 127 .cse5) (= .cse5 0)) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse5)) 256) 0)) (<= .cse5 127) (= .cse6 0)))))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from true [2021-11-13 19:05:28,862 WARN L838 $PredicateComparison]: unable to prove that (and (or (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse8 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse8) 256))) (let ((.cse3 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse12)) 256) 0))) (.cse0 (<= .cse12 127)) (.cse5 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse12) 256) 0))) (.cse2 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse6 (= .cse12 0)) (.cse7 (< 127 .cse12)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse10 (mod .cse8 256))) (and (or (let ((.cse1 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse10) 256) 0)) (= 0 .cse10))) (.cse4 (= .cse8 0))) (and (or .cse0 (and .cse1 (or .cse2 .cse3 .cse4))) (or (and .cse1 (or .cse5 .cse2 .cse6 .cse4)) .cse7))) (< 127 .cse10)) (or (<= .cse10 127) (let ((.cse11 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse10)) 256) 0))))) (and (or (and (or .cse2 .cse3) .cse11) .cse0) (or (and .cse11 (or .cse5 .cse2 .cse6)) .cse7))))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (let ((.cse13 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| .cse13) (<= .cse13 127)) (and (< 127 .cse13) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse13)))) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2021-11-13 19:05:30,910 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse21 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse28 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse21) 256))) (let ((.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse6 (= .cse28 0)) (.cse29 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse21) 256))) (let ((.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse13 (<= .cse29 127)) (.cse10 (< 127 .cse28)) (.cse1 (<= .cse28 127)) (.cse11 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse17 (= .cse29 0)) (.cse18 (< 127 .cse29)) (.cse19 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256)))) (.cse9 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse15 (or .cse4 .cse5 .cse6)) (.cse20 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse0 (mod .cse21 256))) (and (or (< 127 .cse0) (let ((.cse7 (= .cse21 0))) (let ((.cse8 (or (and (not .cse7) .cse20) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse0) 256) 0)) (= 0 .cse0)))) (let ((.cse3 (or (and (or .cse4 .cse19 .cse7) .cse8) .cse9))) (and (or (let ((.cse2 (or .cse11 (and .cse8 (or .cse4 .cse12 .cse7))))) (and (or .cse1 (and .cse2 .cse3)) (or (and .cse2 (or (and (or .cse4 .cse5 .cse6 .cse7) .cse8) .cse9)) .cse10))) .cse13) (or (let ((.cse14 (or .cse11 (and .cse8 (or .cse16 .cse4 .cse17 .cse7))))) (and (or .cse1 (and .cse14 .cse3)) (or (and .cse14 (or .cse9 (and .cse15 .cse8))) .cse10))) .cse18)))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (let ((.cse22 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| .cse22) (<= .cse22 127)) (and (< 127 .cse22) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse22)))) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (<= .cse0 127) (let ((.cse26 (or .cse20 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse0)) 256) 0))))) (let ((.cse24 (or .cse9 (and .cse26 .cse15))) (.cse25 (or .cse9 (and .cse26 (or .cse4 .cse19))))) (and (or (let ((.cse23 (or (and (or .cse4 .cse12) .cse26) .cse11))) (and (or (and .cse23 .cse24) .cse10) (or .cse1 (and .cse23 .cse25)))) .cse13) (or (let ((.cse27 (or .cse11 (and .cse26 (or .cse16 .cse4 .cse17))))) (and (or (and .cse27 .cse24) .cse10) (or .cse1 (and .cse27 .cse25)))) .cse18)))))))))) is different from false [2021-11-13 19:06:18,698 WARN L227 SmtUtils]: Spent 36.00s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 19:06:20,702 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (or (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0))) is different from false [2021-11-13 19:06:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 19:06:21,048 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-13 19:06:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 19:06:21,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 19:06:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 19:06:21,049 INFO L225 Difference]: With dead ends: 43 [2021-11-13 19:06:21,050 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 19:06:21,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 201.6s TimeCoverageRelationStatistics Valid=58, Invalid=168, Unknown=24, NotChecked=350, Total=600 [2021-11-13 19:06:21,051 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 380.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 386.74ms IncrementalHoareTripleChecker+Time [2021-11-13 19:06:21,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 326 Invalid, 154 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 140 Unchecked, 386.74ms Time] [2021-11-13 19:06:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 19:06:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-13 19:06:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 19:06:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-13 19:06:21,058 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2021-11-13 19:06:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 19:06:21,058 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-13 19:06:21,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 19:06:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-13 19:06:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 19:06:21,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 19:06:21,059 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 19:06:21,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 19:06:21,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-13 19:06:21,261 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 19:06:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 19:06:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash 403427572, now seen corresponding path program 1 times [2021-11-13 19:06:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 19:06:21,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766633381] [2021-11-13 19:06:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 19:06:21,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 19:06:21,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 19:06:21,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237345703] [2021-11-13 19:06:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 19:06:21,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 19:06:21,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 19:06:21,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 19:06:21,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6b1ac34-9a6d-46be-bae3-f05fd004b006/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 19:06:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 19:06:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 19:06:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 19:06:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 19:06:21,972 INFO L328 TraceCheckSpWp]: Computing backward predicates...