./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8 --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 f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:49:30,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:49:30,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:49:30,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:49:30,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:49:30,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:49:30,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:49:30,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:49:30,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:49:30,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:49:30,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:49:30,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:49:30,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:49:30,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:49:30,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:49:30,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:49:30,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:49:30,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:49:30,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:49:30,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:49:30,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:49:30,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:49:30,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:49:30,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:49:30,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:49:30,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:49:30,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:49:30,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:49:30,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:49:30,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:49:30,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:49:30,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:49:30,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:49:30,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:49:30,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:49:30,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:49:30,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:49:30,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:49:30,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:49:30,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:49:30,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:49:30,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:49:30,834 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:49:30,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:49:30,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:49:30,835 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:49:30,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:49:30,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:49:30,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:49:30,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:49:30,842 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:49:30,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:49:30,843 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:49:30,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:49:30,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:49:30,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:49:30,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:49:30,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:49:30,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:49:30,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:49:30,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:49:30,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:49:30,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:49:30,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:49:30,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:49:30,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:49:30,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:49:30,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:49:30,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:49:30,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:49:30,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:49:30,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:49:30,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:49:30,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:49:30,846 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:49:30,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:49:30,847 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:49:30,847 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 [2022-12-13 17:49:31,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:49:31,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:49:31,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:49:31,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:49:31,024 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:49:31,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2022-12-13 17:49:33,562 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:49:33,710 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:49:33,710 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2022-12-13 17:49:33,715 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/data/dffdb12ad/114fdaa37a944fc0af4e9face0d6b892/FLAG3e7f396e8 [2022-12-13 17:49:34,128 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/data/dffdb12ad/114fdaa37a944fc0af4e9face0d6b892 [2022-12-13 17:49:34,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:49:34,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:49:34,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:49:34,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:49:34,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:49:34,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc0fda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34, skipping insertion in model container [2022-12-13 17:49:34,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:49:34,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:49:34,273 WARN L237 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2022-12-13 17:49:34,288 WARN L237 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2022-12-13 17:49:34,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:49:34,296 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:49:34,305 WARN L237 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2022-12-13 17:49:34,311 WARN L237 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2022-12-13 17:49:34,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:49:34,322 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:49:34,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34 WrapperNode [2022-12-13 17:49:34,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:49:34,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:49:34,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:49:34,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:49:34,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,347 INFO L138 Inliner]: procedures = 27, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 85 [2022-12-13 17:49:34,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:49:34,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:49:34,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:49:34,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:49:34,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,366 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:49:34,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:49:34,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:49:34,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:49:34,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (1/1) ... [2022-12-13 17:49:34,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:49:34,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:34,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:49:34,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:49:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:49:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-12-13 17:49:34,421 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-12-13 17:49:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-12-13 17:49:34,421 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-12-13 17:49:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:49:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:49:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:49:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 17:49:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 17:49:34,477 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:49:34,478 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:49:34,612 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:49:34,617 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:49:34,617 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 17:49:34,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:49:34 BoogieIcfgContainer [2022-12-13 17:49:34,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:49:34,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:49:34,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:49:34,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:49:34,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:49:34" (1/3) ... [2022-12-13 17:49:34,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17abad24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:49:34, skipping insertion in model container [2022-12-13 17:49:34,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:34" (2/3) ... [2022-12-13 17:49:34,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17abad24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:49:34, skipping insertion in model container [2022-12-13 17:49:34,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:49:34" (3/3) ... [2022-12-13 17:49:34,625 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_4.i [2022-12-13 17:49:34,639 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:49:34,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 17:49:34,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:49:34,680 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d8bdb89, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:49:34,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:49:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 17:49:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:49:34,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:34,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:34,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-12-13 17:49:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:34,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796808305] [2022-12-13 17:49:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:34,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:34,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796808305] [2022-12-13 17:49:34,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 17:49:34,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144524310] [2022-12-13 17:49:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:34,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:34,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:34,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:34,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:49:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:34,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:34,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:34,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144524310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:34,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:34,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:49:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522884083] [2022-12-13 17:49:34,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:49:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:34,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:49:34,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:34,974 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:35,021 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2022-12-13 17:49:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:49:35,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 17:49:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:35,036 INFO L225 Difference]: With dead ends: 97 [2022-12-13 17:49:35,036 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 17:49:35,039 INFO L412 NwaCegarLoop]: 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 [2022-12-13 17:49:35,042 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:35,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:49:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 17:49:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-12-13 17:49:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-12-13 17:49:35,070 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 11 [2022-12-13 17:49:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:35,070 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-12-13 17:49:35,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-12-13 17:49:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:49:35,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:35,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:35,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:49:35,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 17:49:35,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash -5379846, now seen corresponding path program 1 times [2022-12-13 17:49:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:35,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722015007] [2022-12-13 17:49:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:35,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:35,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:35,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722015007] [2022-12-13 17:49:35,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 17:49:35,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137565099] [2022-12-13 17:49:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:35,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:35,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:35,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:49:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:35,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:35,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:35,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:35,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137565099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:35,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:35,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:49:35,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072597311] [2022-12-13 17:49:35,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:35,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:49:35,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:49:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:35,463 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:35,477 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-12-13 17:49:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:49:35,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 17:49:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:35,478 INFO L225 Difference]: With dead ends: 67 [2022-12-13 17:49:35,478 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 17:49:35,479 INFO L412 NwaCegarLoop]: 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 [2022-12-13 17:49:35,480 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:35,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:49:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 17:49:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-12-13 17:49:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:35,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-12-13 17:49:35,485 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 11 [2022-12-13 17:49:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:35,485 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-12-13 17:49:35,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-12-13 17:49:35,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:49:35,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:35,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:35,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:49:35,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 17:49:35,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:35,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:35,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-12-13 17:49:35,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:35,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649932188] [2022-12-13 17:49:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:35,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:35,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:49:35,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916761022] [2022-12-13 17:49:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:35,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:35,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:35,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:35,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:49:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:35,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 17:49:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:35,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:35,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:35,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649932188] [2022-12-13 17:49:35,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:49:35,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916761022] [2022-12-13 17:49:35,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916761022] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:35,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:35,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:49:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74910395] [2022-12-13 17:49:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:35,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:49:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:49:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:35,957 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:35,974 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-12-13 17:49:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:49:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 17:49:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:35,975 INFO L225 Difference]: With dead ends: 56 [2022-12-13 17:49:35,975 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 17:49:35,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:35,976 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:35,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:49:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 17:49:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-13 17:49:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-12-13 17:49:35,980 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-12-13 17:49:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:35,980 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-12-13 17:49:35,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-12-13 17:49:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:49:35,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:35,981 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:35,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:49:36,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:36,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:36,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-12-13 17:49:36,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:36,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886414364] [2022-12-13 17:49:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:36,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:36,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:49:36,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672324834] [2022-12-13 17:49:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:36,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:36,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:36,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:49:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:36,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:49:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:36,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:36,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:36,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886414364] [2022-12-13 17:49:36,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:49:36,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672324834] [2022-12-13 17:49:36,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672324834] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:36,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:36,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-13 17:49:36,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395893746] [2022-12-13 17:49:36,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:36,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:49:36,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:36,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:49:36,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:49:36,413 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:36,444 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-12-13 17:49:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:36,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 17:49:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:36,445 INFO L225 Difference]: With dead ends: 60 [2022-12-13 17:49:36,445 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 17:49:36,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:49:36,445 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:36,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 152 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:49:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 17:49:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-13 17:49:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-12-13 17:49:36,450 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-12-13 17:49:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:36,450 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-12-13 17:49:36,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-12-13 17:49:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 17:49:36,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:36,451 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:36,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:49:36,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:36,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-12-13 17:49:36,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:36,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799520587] [2022-12-13 17:49:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:36,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:36,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:49:36,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700501807] [2022-12-13 17:49:36,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:49:36,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:36,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:36,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:49:36,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:49:36,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:36,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:49:36,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:36,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:37,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:37,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799520587] [2022-12-13 17:49:37,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:49:37,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700501807] [2022-12-13 17:49:37,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700501807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:37,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:37,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-13 17:49:37,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751656536] [2022-12-13 17:49:37,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:49:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:49:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:49:37,046 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:37,125 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-12-13 17:49:37,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:49:37,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 17:49:37,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:37,126 INFO L225 Difference]: With dead ends: 68 [2022-12-13 17:49:37,126 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 17:49:37,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:49:37,127 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:37,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 226 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:49:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 17:49:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-13 17:49:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-12-13 17:49:37,133 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2022-12-13 17:49:37,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:37,134 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-12-13 17:49:37,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-12-13 17:49:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:49:37,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:37,134 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:37,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:49:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:37,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2022-12-13 17:49:37,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:37,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933386777] [2022-12-13 17:49:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:37,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:37,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:49:37,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890780053] [2022-12-13 17:49:37,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:49:37,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:37,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:37,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:37,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:49:37,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 17:49:37,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:37,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:49:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 17:49:37,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 17:49:37,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:37,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933386777] [2022-12-13 17:49:37,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:49:37,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890780053] [2022-12-13 17:49:37,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890780053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:37,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:37,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-12-13 17:49:37,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32642369] [2022-12-13 17:49:37,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:37,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:49:37,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:49:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:49:37,885 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:38,393 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-12-13 17:49:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:49:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 17:49:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:38,394 INFO L225 Difference]: With dead ends: 81 [2022-12-13 17:49:38,394 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 17:49:38,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-12-13 17:49:38,395 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:38,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 495 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 17:49:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-12-13 17:49:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 17:49:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-12-13 17:49:38,403 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2022-12-13 17:49:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:38,403 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-12-13 17:49:38,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-12-13 17:49:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 17:49:38,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:38,404 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:38,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:49:38,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 17:49:38,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:38,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2022-12-13 17:49:38,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:38,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122744170] [2022-12-13 17:49:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:38,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:38,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:49:38,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884288100] [2022-12-13 17:49:38,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:49:38,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:38,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:38,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:38,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:49:38,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:49:38,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:38,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 17:49:38,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:38,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:38,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122744170] [2022-12-13 17:49:38,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:49:38,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884288100] [2022-12-13 17:49:38,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884288100] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:38,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:38,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-12-13 17:49:38,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655426839] [2022-12-13 17:49:38,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:38,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:49:38,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:49:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:49:38,890 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:39,042 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-12-13 17:49:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:49:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 17:49:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:39,044 INFO L225 Difference]: With dead ends: 94 [2022-12-13 17:49:39,044 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 17:49:39,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:49:39,045 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:39,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 411 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:49:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 17:49:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-12-13 17:49:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 17:49:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-12-13 17:49:39,051 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2022-12-13 17:49:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:39,051 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-12-13 17:49:39,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-12-13 17:49:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:49:39,052 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:39,052 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:39,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:49:39,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:39,253 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2022-12-13 17:49:39,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:39,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749855122] [2022-12-13 17:49:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:39,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:39,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:49:39,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157319955] [2022-12-13 17:49:39,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:49:39,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:39,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:39,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:39,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:49:39,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 17:49:39,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:49:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:39,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:39,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:39,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749855122] [2022-12-13 17:49:39,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:49:39,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157319955] [2022-12-13 17:49:39,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157319955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:39,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:39,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-12-13 17:49:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298317572] [2022-12-13 17:49:39,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:39,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:49:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:49:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:49:39,526 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:39,590 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-12-13 17:49:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:49:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 17:49:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:39,591 INFO L225 Difference]: With dead ends: 76 [2022-12-13 17:49:39,591 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 17:49:39,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:49:39,592 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:39,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 354 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:49:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 17:49:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-13 17:49:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 17:49:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-12-13 17:49:39,597 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-12-13 17:49:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:39,597 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-12-13 17:49:39,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-12-13 17:49:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 17:49:39,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:39,598 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:39,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:49:39,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 17:49:39,800 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2022-12-13 17:49:39,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:39,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217458512] [2022-12-13 17:49:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:39,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 17:49:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153970501] [2022-12-13 17:49:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:39,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:39,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:39,834 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:39,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:49:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:40,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:49:40,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:40,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:40,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217458512] [2022-12-13 17:49:40,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 17:49:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153970501] [2022-12-13 17:49:40,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153970501] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:40,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:40,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-12-13 17:49:40,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027635612] [2022-12-13 17:49:40,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:40,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:49:40,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:49:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:49:40,312 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 17:49:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:41,010 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-12-13 17:49:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:49:41,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-13 17:49:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:41,011 INFO L225 Difference]: With dead ends: 49 [2022-12-13 17:49:41,011 INFO L226 Difference]: Without dead ends: 23 [2022-12-13 17:49:41,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:49:41,012 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:41,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 419 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:49:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-13 17:49:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-13 17:49:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 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) [2022-12-13 17:49:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-13 17:49:41,016 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-12-13 17:49:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:41,016 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-13 17:49:41,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 17:49:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-13 17:49:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 17:49:41,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:41,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:41,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:49:41,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:41,219 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-12-13 17:49:41,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:41,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129201973] [2022-12-13 17:49:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:41,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:49:41,235 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:49:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:49:41,253 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:49:41,254 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:49:41,254 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-12-13 17:49:41,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 17:49:41,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:49:41,258 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2022-12-13 17:49:41,260 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 17:49:41,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 05:49:41 BoogieIcfgContainer [2022-12-13 17:49:41,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 17:49:41,276 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 17:49:41,276 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 17:49:41,277 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 17:49:41,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:49:34" (3/4) ... [2022-12-13 17:49:41,279 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 17:49:41,279 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 17:49:41,280 INFO L158 Benchmark]: Toolchain (without parser) took 7149.01ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 98.5MB in the beginning and 112.5MB in the end (delta: -14.0MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. [2022-12-13 17:49:41,280 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 130.0MB. Free memory is still 97.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:49:41,280 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.92ms. Allocated memory is still 130.0MB. Free memory was 98.1MB in the beginning and 86.9MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:49:41,281 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.34ms. Allocated memory is still 130.0MB. Free memory was 86.9MB in the beginning and 85.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:49:41,281 INFO L158 Benchmark]: Boogie Preprocessor took 21.54ms. Allocated memory is still 130.0MB. Free memory was 85.1MB in the beginning and 83.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:49:41,281 INFO L158 Benchmark]: RCFGBuilder took 248.86ms. Allocated memory is still 130.0MB. Free memory was 83.9MB in the beginning and 71.4MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 17:49:41,281 INFO L158 Benchmark]: TraceAbstraction took 6655.66ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 70.9MB in the beginning and 113.6MB in the end (delta: -42.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:49:41,282 INFO L158 Benchmark]: Witness Printer took 2.89ms. Allocated memory is still 161.5MB. Free memory was 113.6MB in the beginning and 112.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:49:41,283 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 130.0MB. Free memory is still 97.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.92ms. Allocated memory is still 130.0MB. Free memory was 98.1MB in the beginning and 86.9MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.34ms. Allocated memory is still 130.0MB. Free memory was 86.9MB in the beginning and 85.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.54ms. Allocated memory is still 130.0MB. Free memory was 85.1MB in the beginning and 83.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 248.86ms. Allocated memory is still 130.0MB. Free memory was 83.9MB in the beginning and 71.4MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6655.66ms. Allocated memory was 130.0MB in the beginning and 161.5MB in the end (delta: 31.5MB). Free memory was 70.9MB in the beginning and 113.6MB in the end (delta: -42.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.89ms. Allocated memory is still 161.5MB. Free memory was 113.6MB in the beginning and 112.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L100] CALL, EXPR f(IN) VAL [\old(x)=116] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=116, x=116] [L100] RET, EXPR f(IN) VAL [f(IN)=110, IN=116] [L100] CALL, EXPR fp(IN) VAL [\old(x)=116] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=116, x=116] [L100] RET, EXPR fp(IN) VAL [f(IN)=110, fp(IN)=109, IN=116] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=111, x=111] [L102] RET, EXPR f(x) VAL [f(x)=117, IN=116, x=111] [L102] CALL, EXPR fp(x) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=111, x=111] [L102] RET, EXPR fp(x) VAL [f(x)=117, fp(x)=112, IN=116, x=111] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=114] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=114, x=114] [L104] RET, EXPR f(x) VAL [f(x)=113, IN=116, x=114] [L104] CALL, EXPR fp(x) VAL [\old(x)=114] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=114, x=114] [L104] RET, EXPR fp(x) VAL [f(x)=113, fp(x)=115, IN=116, x=114] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=116] [L109] reach_error() VAL [IN=116] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 102 mSDsluCounter, 2317 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1948 mSDsCounter, 70 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 903 IncrementalHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 70 mSolverCounterUnsat, 369 mSDtfsCounter, 903 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 328 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 234 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 1589 SizeOfPredicates, 41 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 67/315 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 17:49:41,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8 --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 f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:49:42,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:49:42,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:49:42,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:49:42,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:49:42,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:49:42,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:49:42,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:49:42,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:49:42,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:49:42,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:49:42,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:49:42,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:49:42,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:49:42,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:49:42,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:49:42,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:49:42,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:49:42,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:49:42,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:49:42,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:49:42,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:49:42,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:49:42,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:49:42,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:49:42,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:49:42,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:49:42,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:49:42,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:49:42,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:49:42,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:49:42,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:49:42,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:49:42,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:49:42,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:49:42,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:49:42,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:49:42,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:49:42,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:49:42,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:49:42,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:49:42,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-12-13 17:49:42,899 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:49:42,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:49:42,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:49:42,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:49:42,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:49:42,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:49:42,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:49:42,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:49:42,901 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:49:42,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:49:42,902 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:49:42,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:49:42,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:49:42,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:49:42,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:49:42,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:49:42,903 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:49:42,903 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 17:49:42,903 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 17:49:42,904 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:49:42,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:49:42,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:49:42,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:49:42,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:49:42,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:49:42,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:49:42,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:49:42,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:49:42,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:49:42,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:49:42,906 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 17:49:42,906 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 17:49:42,906 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:49:42,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:49:42,906 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:49:42,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:49:42,907 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 17:49:42,907 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:49:42,907 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 [2022-12-13 17:49:43,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:49:43,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:49:43,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:49:43,158 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:49:43,158 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:49:43,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2022-12-13 17:49:45,797 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:49:45,961 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:49:45,962 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2022-12-13 17:49:45,967 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/data/b96ddc0f7/3437d724ad8f4e1d8e83eeebde3ef748/FLAGf620ab128 [2022-12-13 17:49:45,977 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/data/b96ddc0f7/3437d724ad8f4e1d8e83eeebde3ef748 [2022-12-13 17:49:45,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:49:45,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:49:45,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:49:45,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:49:45,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:49:45,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:49:45" (1/1) ... [2022-12-13 17:49:45,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a88d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:45, skipping insertion in model container [2022-12-13 17:49:45,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:49:45" (1/1) ... [2022-12-13 17:49:45,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:49:46,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:49:46,129 WARN L237 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2022-12-13 17:49:46,152 WARN L237 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2022-12-13 17:49:46,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:49:46,167 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:49:46,181 WARN L237 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2022-12-13 17:49:46,191 WARN L237 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_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2022-12-13 17:49:46,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:49:46,208 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:49:46,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46 WrapperNode [2022-12-13 17:49:46,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:49:46,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:49:46,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:49:46,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:49:46,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,250 INFO L138 Inliner]: procedures = 28, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 82 [2022-12-13 17:49:46,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:49:46,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:49:46,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:49:46,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:49:46,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:49:46,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:49:46,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:49:46,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:49:46,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (1/1) ... [2022-12-13 17:49:46,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:49:46,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:46,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:49:46,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:49:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:49:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 17:49:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-12-13 17:49:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-12-13 17:49:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-12-13 17:49:46,351 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-12-13 17:49:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:49:46,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:49:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 17:49:46,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 17:49:46,415 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:49:46,416 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:49:55,883 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:49:55,888 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:49:55,889 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 17:49:55,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:49:55 BoogieIcfgContainer [2022-12-13 17:49:55,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:49:55,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:49:55,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:49:55,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:49:55,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:49:45" (1/3) ... [2022-12-13 17:49:55,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c63372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:49:55, skipping insertion in model container [2022-12-13 17:49:55,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:49:46" (2/3) ... [2022-12-13 17:49:55,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c63372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:49:55, skipping insertion in model container [2022-12-13 17:49:55,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:49:55" (3/3) ... [2022-12-13 17:49:55,897 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_4.i [2022-12-13 17:49:55,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:49:55,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 17:49:55,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:49:55,955 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@640629fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:49:55,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 17:49:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 17:49:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:49:55,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:55,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:55,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-12-13 17:49:55,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:55,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259802585] [2022-12-13 17:49:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:55,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:55,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:49:55,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 17:49:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:56,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:56,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:56,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:56,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259802585] [2022-12-13 17:49:56,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259802585] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:56,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:56,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:49:56,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950418845] [2022-12-13 17:49:56,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:49:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:49:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:56,181 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:56,271 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-12-13 17:49:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:49:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 17:49:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:56,280 INFO L225 Difference]: With dead ends: 99 [2022-12-13 17:49:56,280 INFO L226 Difference]: Without dead ends: 46 [2022-12-13 17:49:56,283 INFO L412 NwaCegarLoop]: 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 [2022-12-13 17:49:56,286 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:56,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:49:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-13 17:49:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-12-13 17:49:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-12-13 17:49:56,314 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-12-13 17:49:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:56,314 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-12-13 17:49:56,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-12-13 17:49:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 17:49:56,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:56,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:56,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:49:56,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:56,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-12-13 17:49:56,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:56,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801806744] [2022-12-13 17:49:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:56,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:56,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:56,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:49:56,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 17:49:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:56,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:56,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801806744] [2022-12-13 17:49:56,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801806744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:56,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:56,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:49:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715332523] [2022-12-13 17:49:56,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:56,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:49:56,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:49:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:56,718 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:56,781 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-12-13 17:49:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:49:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 17:49:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:56,783 INFO L225 Difference]: With dead ends: 55 [2022-12-13 17:49:56,783 INFO L226 Difference]: Without dead ends: 41 [2022-12-13 17:49:56,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:56,785 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:56,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:49:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-13 17:49:56,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-13 17:49:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-12-13 17:49:56,793 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-12-13 17:49:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:56,793 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-12-13 17:49:56,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-12-13 17:49:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:49:56,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:56,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:56,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 17:49:56,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:56,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-12-13 17:49:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:57,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852289765] [2022-12-13 17:49:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:57,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:57,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:57,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:49:57,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 17:49:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:57,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 17:49:57,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:57,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:57,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:57,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852289765] [2022-12-13 17:49:57,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852289765] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:57,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:57,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:49:57,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083550927] [2022-12-13 17:49:57,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:57,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:49:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:49:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:57,283 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:57,345 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-12-13 17:49:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:49:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 17:49:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:57,347 INFO L225 Difference]: With dead ends: 56 [2022-12-13 17:49:57,347 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 17:49:57,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:49:57,348 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:57,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:49:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 17:49:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-13 17:49:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-12-13 17:49:57,354 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-12-13 17:49:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:57,354 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-12-13 17:49:57,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-12-13 17:49:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:49:57,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:57,355 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:57,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-12-13 17:49:57,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:57,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-12-13 17:49:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:57,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480089097] [2022-12-13 17:49:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:57,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:57,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:57,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:49:57,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 17:49:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:49:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:57,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:58,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:58,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480089097] [2022-12-13 17:49:58,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480089097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:58,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:58,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-13 17:49:58,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727124856] [2022-12-13 17:49:58,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:49:58,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:49:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:49:58,127 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:58,287 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-12-13 17:49:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 17:49:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:58,289 INFO L225 Difference]: With dead ends: 60 [2022-12-13 17:49:58,289 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 17:49:58,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:49:58,291 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:58,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:49:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 17:49:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-13 17:49:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 17:49:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-12-13 17:49:58,298 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-12-13 17:49:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:58,298 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-12-13 17:49:58,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-12-13 17:49:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 17:49:58,299 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:58,299 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:58,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 17:49:58,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:58,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:58,503 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-12-13 17:49:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727733819] [2022-12-13 17:49:58,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:49:58,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:58,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:58,506 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:49:58,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 17:49:58,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:49:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:58,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:49:58,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:49:59,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:50:05,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:50:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727733819] [2022-12-13 17:50:05,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727733819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:05,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:50:05,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-12-13 17:50:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290844694] [2022-12-13 17:50:05,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:05,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:50:05,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:50:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:50:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:50:05,997 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:25,087 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:50:38,431 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:50:52,548 WARN L233 SmtUtils]: Spent 9.76s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:50:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:55,690 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2022-12-13 17:50:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:50:55,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 17:50:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:55,721 INFO L225 Difference]: With dead ends: 71 [2022-12-13 17:50:55,721 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 17:50:55,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-12-13 17:50:55,722 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:55,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 406 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-12-13 17:50:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 17:50:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-12-13 17:50:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 17:50:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-12-13 17:50:55,738 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2022-12-13 17:50:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:55,738 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-12-13 17:50:55,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-12-13 17:50:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:50:55,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:55,740 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:55,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 17:50:55,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:50:55,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash -311360839, now seen corresponding path program 3 times [2022-12-13 17:50:55,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:50:55,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997298595] [2022-12-13 17:50:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:50:55,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:50:55,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:50:55,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:50:55,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 17:50:56,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:50:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 17:50:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 17:50:56,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:50:56,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:50:56,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997298595] [2022-12-13 17:50:56,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997298595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:50:56,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:50:56,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:50:56,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961481763] [2022-12-13 17:50:56,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:50:56,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:50:56,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:50:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:50:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:50:56,114 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:56,164 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-12-13 17:50:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:50:56,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 17:50:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:56,167 INFO L225 Difference]: With dead ends: 78 [2022-12-13 17:50:56,167 INFO L226 Difference]: Without dead ends: 67 [2022-12-13 17:50:56,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:50:56,168 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:56,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:50:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-13 17:50:56,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-12-13 17:50:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 17:50:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-12-13 17:50:56,182 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 23 [2022-12-13 17:50:56,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:56,183 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-12-13 17:50:56,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-12-13 17:50:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 17:50:56,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:56,184 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:56,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 17:50:56,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:50:56,386 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:56,387 INFO L85 PathProgramCache]: Analyzing trace with hash 603968502, now seen corresponding path program 4 times [2022-12-13 17:50:56,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:50:56,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298050866] [2022-12-13 17:50:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:50:56,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:50:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:50:56,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:50:56,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 17:50:56,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:50:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:50:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:50:56,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:50:57,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:50:57,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298050866] [2022-12-13 17:50:57,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298050866] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:57,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:50:57,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-13 17:50:57,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479531720] [2022-12-13 17:50:57,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:57,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:50:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:50:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:50:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:50:57,563 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:58,326 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-12-13 17:50:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:50:58,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 17:50:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:58,335 INFO L225 Difference]: With dead ends: 88 [2022-12-13 17:50:58,335 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 17:50:58,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:50:58,336 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:58,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:50:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 17:50:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-12-13 17:50:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 17:50:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-12-13 17:50:58,344 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 25 [2022-12-13 17:50:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:58,344 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-12-13 17:50:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-12-13 17:50:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 17:50:58,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:58,345 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:58,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 17:50:58,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:50:58,547 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:58,548 INFO L85 PathProgramCache]: Analyzing trace with hash 225362363, now seen corresponding path program 1 times [2022-12-13 17:50:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:50:58,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853926827] [2022-12-13 17:50:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:58,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:50:58,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:50:58,553 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:50:58,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 17:50:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:58,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:50:58,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:50:59,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:59,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:50:59,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853926827] [2022-12-13 17:50:59,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853926827] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:59,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:50:59,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-13 17:50:59,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573628344] [2022-12-13 17:50:59,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:59,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:50:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:50:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:50:59,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:50:59,914 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 17:51:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:01,255 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2022-12-13 17:51:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:51:01,262 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-12-13 17:51:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:01,263 INFO L225 Difference]: With dead ends: 91 [2022-12-13 17:51:01,263 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 17:51:01,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:51:01,264 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:01,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 264 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:51:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 17:51:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2022-12-13 17:51:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.2) internal successors, (60), 53 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 17:51:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-12-13 17:51:01,274 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 26 [2022-12-13 17:51:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:01,274 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-12-13 17:51:01,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 17:51:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-12-13 17:51:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:51:01,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:01,275 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:01,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-13 17:51:01,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:51:01,477 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 5 times [2022-12-13 17:51:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:51:01,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468894852] [2022-12-13 17:51:01,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:51:01,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:51:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:51:01,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:51:01,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 17:51:01,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 17:51:01,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:51:01,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:51:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:51:02,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:51:05,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:51:05,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468894852] [2022-12-13 17:51:05,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468894852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:05,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:51:05,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-12-13 17:51:05,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41946036] [2022-12-13 17:51:05,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:05,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:51:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:51:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:51:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:51:05,305 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:06,087 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-12-13 17:51:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:51:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 17:51:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:06,095 INFO L225 Difference]: With dead ends: 81 [2022-12-13 17:51:06,095 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 17:51:06,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:51:06,096 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:06,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 274 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:51:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 17:51:06,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-13 17:51:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 17:51:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-12-13 17:51:06,104 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-12-13 17:51:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:06,104 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-12-13 17:51:06,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-12-13 17:51:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 17:51:06,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:06,105 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:06,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 17:51:06,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:51:06,306 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:06,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 2 times [2022-12-13 17:51:06,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:51:06,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709558078] [2022-12-13 17:51:06,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:51:06,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:51:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:51:06,308 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:51:06,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 17:51:06,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:51:06,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:51:06,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:51:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:51:07,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:51:15,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:51:15,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709558078] [2022-12-13 17:51:15,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709558078] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:15,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:51:15,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-12-13 17:51:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411090769] [2022-12-13 17:51:15,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:15,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:51:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:51:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:51:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:51:15,443 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 17:51:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:32,801 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-12-13 17:51:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:51:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-13 17:51:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:32,802 INFO L225 Difference]: With dead ends: 49 [2022-12-13 17:51:32,802 INFO L226 Difference]: Without dead ends: 23 [2022-12-13 17:51:32,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:51:32,803 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:32,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 390 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-13 17:51:32,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-13 17:51:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-13 17:51:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 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) [2022-12-13 17:51:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-13 17:51:32,806 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-12-13 17:51:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:32,806 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-13 17:51:32,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 17:51:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-13 17:51:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 17:51:32,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:32,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:32,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-13 17:51:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:51:33,009 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:33,010 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-12-13 17:51:33,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:51:33,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492955776] [2022-12-13 17:51:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:51:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:51:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:51:33,015 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 17:51:33,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6abde57b-cafb-4b92-a621-a3a26b1bf6a5/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process