./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 285abbae5ead4c9c261c327064d45c09bb5603aa ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 285abbae5ead4c9c261c327064d45c09bb5603aa ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:22,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:22,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:22,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:22,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:22,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:22,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:22,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:22,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:22,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:22,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:22,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:22,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:22,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:22,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:22,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:22,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:22,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:22,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:22,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:22,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:22,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:22,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:22,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:22,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:22,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:22,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:22,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:22,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:22,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:22,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:22,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:22,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:22,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:22,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:22,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:22,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:22,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:22,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:22,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:22,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:22,932 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:23:22,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:22,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:22,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:22,986 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:22,986 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:22,986 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:22,986 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:22,987 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:22,987 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:22,987 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:22,988 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:22,989 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:22,989 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:22,989 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:22,989 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:22,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:22,991 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:22,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:22,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:22,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:22,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:23:22,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:22,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:23:22,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:22,992 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:22,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:23:22,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:22,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:23:22,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:22,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:22,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:22,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:22,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:22,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:23:22,995 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:22,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:22,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:23:22,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:22,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:22,996 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 285abbae5ead4c9c261c327064d45c09bb5603aa [2021-10-11 02:23:23,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:23,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:23,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:23,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:23,320 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:23,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/ifeqn3.c [2021-10-11 02:23:23,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data/2791dd7b6/e25bdf2a815d41e79cc58a7d5256d81c/FLAGf5b1ac0c6 [2021-10-11 02:23:23,871 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:23,871 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/sv-benchmarks/c/array-fpi/ifeqn3.c [2021-10-11 02:23:23,877 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data/2791dd7b6/e25bdf2a815d41e79cc58a7d5256d81c/FLAGf5b1ac0c6 [2021-10-11 02:23:24,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data/2791dd7b6/e25bdf2a815d41e79cc58a7d5256d81c [2021-10-11 02:23:24,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:24,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:24,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:24,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:24,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:24,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d7b935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24, skipping insertion in model container [2021-10-11 02:23:24,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:24,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:24,467 WARN L226 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_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2021-10-11 02:23:24,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:24,496 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:24,509 WARN L226 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_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2021-10-11 02:23:24,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:24,533 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:24,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24 WrapperNode [2021-10-11 02:23:24,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:24,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:24,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:24,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:24,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:24,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:24,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:24,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:24,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... [2021-10-11 02:23:24,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:24,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:24,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:24,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:24,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:23:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:23:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:24,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:24,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:23:25,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:25,166 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:23:25,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:25 BoogieIcfgContainer [2021-10-11 02:23:25,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:25,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:25,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:25,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:25,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:24" (1/3) ... [2021-10-11 02:23:25,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbf0310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:25, skipping insertion in model container [2021-10-11 02:23:25,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:24" (2/3) ... [2021-10-11 02:23:25,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbf0310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:25, skipping insertion in model container [2021-10-11 02:23:25,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:25" (3/3) ... [2021-10-11 02:23:25,177 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3.c [2021-10-11 02:23:25,190 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:25,193 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:23:25,205 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:23:25,229 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:25,229 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:25,229 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:25,230 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:25,230 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:25,230 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:25,230 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:25,230 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:23:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:23:25,249 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:25,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:25,250 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2021-10-11 02:23:25,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:25,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927783058] [2021-10-11 02:23:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:25,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:25,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960870762] [2021-10-11 02:23:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:23:25,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:25,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:25,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927783058] [2021-10-11 02:23:25,690 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:25,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960870762] [2021-10-11 02:23:25,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:25,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-11 02:23:25,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690671768] [2021-10-11 02:23:25,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:25,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:25,713 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2021-10-11 02:23:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:25,765 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-11 02:23:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:25,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:23:25,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:25,776 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:23:25,776 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:23:25,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:23:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:23:25,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:23:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-11 02:23:25,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-11 02:23:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:25,813 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-11 02:23:25,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-11 02:23:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:23:25,814 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:25,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:26,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-11 02:23:26,029 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:26,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2021-10-11 02:23:26,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:26,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585485025] [2021-10-11 02:23:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:26,074 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:26,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339826937] [2021-10-11 02:23:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:23:26,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:23:26,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:23:26,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585485025] [2021-10-11 02:23:26,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:26,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339826937] [2021-10-11 02:23:26,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:26,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-11 02:23:26,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92216041] [2021-10-11 02:23:26,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:23:26,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:23:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:26,269 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2021-10-11 02:23:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:26,329 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:23:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:23:26,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:23:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:26,331 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:23:26,331 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:23:26,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:26,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:23:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-11 02:23:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:23:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:23:26,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:23:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:26,337 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:23:26,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:23:26,337 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:23:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:23:26,338 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:26,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:26,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:26,553 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:26,554 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2021-10-11 02:23:26,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:26,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160269405] [2021-10-11 02:23:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:26,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:26,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680252416] [2021-10-11 02:23:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:26,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 02:23:26,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:26,820 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-11 02:23:26,822 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:26,824 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:26,826 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:23:26,827 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-10-11 02:23:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:26,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:26,927 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2021-10-11 02:23:26,927 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:23:27,042 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:23:27,047 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:23:27,050 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:23:27,062 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:23:27,142 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:27,144 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 47 [2021-10-11 02:23:27,145 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:23:27,152 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_2], 2=[v_arrayElimCell_1]} [2021-10-11 02:23:27,190 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296)) (.cse14 (mod c_ULTIMATE.start_main_~i~0 4294967296))) (let ((.cse1 (<= .cse14 2147483647)) (.cse7 (<= .cse13 2147483647)) (.cse0 (= c_ULTIMATE.start_main_~i~0 0)) (.cse10 (< 2147483647 .cse14)) (.cse2 (< 2147483647 .cse13))) (and (or .cse0 .cse1 .cse2 (forall ((v_prenex_6 Int) (v_prenex_7 Int) (v_prenex_10 Int) (v_prenex_8 (Array Int (Array Int Int))) (v_prenex_9 Int)) (= (select (let ((.cse3 (select v_prenex_8 v_prenex_6))) (store .cse3 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_10 (- 34359738368)) (let ((.cse4 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_8 v_prenex_7) (+ .cse4 v_prenex_9)) (select .cse3 (+ .cse4 v_prenex_10)))))) v_prenex_10) 1))) (or .cse0 .cse1 (forall ((v_prenex_15 Int) (v_prenex_12 Int) (v_prenex_13 (Array Int (Array Int Int))) (v_prenex_11 Int) (v_prenex_14 Int)) (= (select (let ((.cse5 (select v_prenex_13 v_prenex_11))) (store .cse5 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_15 (- 34359738368)) (let ((.cse6 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse5 (+ v_prenex_15 .cse6 (- 34359738368))) (select (select v_prenex_13 v_prenex_12) (+ v_prenex_14 .cse6 (- 34359738368))))))) v_prenex_15) 1)) .cse7) (or .cse0 (forall ((ULTIMATE.start_main_~b~0.base Int) (ULTIMATE.start_main_~a~0.base Int) (|#memory_int| (Array Int (Array Int Int))) (ULTIMATE.start_main_~a~0.offset Int) (ULTIMATE.start_main_~b~0.offset Int)) (= (select (let ((.cse8 (select |#memory_int| ULTIMATE.start_main_~b~0.base))) (store .cse8 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) ULTIMATE.start_main_~b~0.offset) (let ((.cse9 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse8 (+ .cse9 ULTIMATE.start_main_~b~0.offset (- 34359738368))) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset .cse9 (- 34359738368))))))) ULTIMATE.start_main_~b~0.offset) 1)) .cse10 .cse7) (or (forall ((v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 (Array Int (Array Int Int))) (v_prenex_1 Int)) (= (select (let ((.cse11 (select v_prenex_3 v_prenex_1))) (store .cse11 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_5) (let ((.cse12 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_3 v_prenex_2) (+ v_prenex_4 .cse12)) (select .cse11 (+ v_prenex_5 .cse12)))))) v_prenex_5) 1)) .cse0 .cse10 .cse2)))) is different from false [2021-10-11 02:23:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-10-11 02:23:27,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160269405] [2021-10-11 02:23:27,209 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:27,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680252416] [2021-10-11 02:23:27,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829917698] [2021-10-11 02:23:27,240 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:23:27,240 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:27,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:27,257 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:27,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:27,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:28,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:29,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:29,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:29,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:29,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:29,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:29,348 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:29,550 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-10-11 02:23:29,728 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:23:29,933 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:23:30,302 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-10-11 02:23:30,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:30,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:23:30,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-10-11 02:23:30,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832635235] [2021-10-11 02:23:30,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:23:30,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:23:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=164, Unknown=1, NotChecked=26, Total=240 [2021-10-11 02:23:30,309 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2021-10-11 02:23:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:30,731 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-11 02:23:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 02:23:30,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2021-10-11 02:23:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:30,733 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:23:30,733 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:23:30,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=471, Unknown=1, NotChecked=46, Total=650 [2021-10-11 02:23:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:23:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 14. [2021-10-11 02:23:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:23:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-11 02:23:30,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-10-11 02:23:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:30,739 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-11 02:23:30,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:23:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-11 02:23:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:23:30,739 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:30,740 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:30,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:30,968 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash 252084121, now seen corresponding path program 2 times [2021-10-11 02:23:30,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:30,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690685634] [2021-10-11 02:23:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:31,035 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:31,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893436973] [2021-10-11 02:23:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:31,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:23:31,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:23:31,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:23:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:31,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:31,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690685634] [2021-10-11 02:23:31,215 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:31,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893436973] [2021-10-11 02:23:31,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251910958] [2021-10-11 02:23:31,221 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:23:31,222 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:31,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:31,222 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:31,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:31,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:31,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:31,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:31,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:31,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:32,566 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:32,757 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-10-11 02:23:32,916 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:23:33,113 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:23:33,437 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-10-11 02:23:33,438 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:33,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:23:33,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 02:23:33,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915097641] [2021-10-11 02:23:33,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:23:33,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:23:33,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:23:33,442 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2021-10-11 02:23:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:33,559 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-11 02:23:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:33,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 02:23:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:33,561 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:23:33,561 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:23:33,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:23:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:23:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-10-11 02:23:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:23:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-11 02:23:33,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-10-11 02:23:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:33,569 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-11 02:23:33,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:23:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-11 02:23:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:23:33,570 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:33,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:33,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:33,771 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:33,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1950532691, now seen corresponding path program 3 times [2021-10-11 02:23:33,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:33,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45103608] [2021-10-11 02:23:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:33,808 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:33,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326445487] [2021-10-11 02:23:33,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:33,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:23:33,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:23:33,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-11 02:23:33,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:34,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:35,859 WARN L197 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2021-10-11 02:23:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 02:23:35,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45103608] [2021-10-11 02:23:35,866 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:35,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326445487] [2021-10-11 02:23:35,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61857641] [2021-10-11 02:23:35,870 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:23:35,870 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:35,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:35,871 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:35,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:36,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:36,743 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:36,943 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-10-11 02:23:37,102 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:23:37,270 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:23:37,475 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-10-11 02:23:37,476 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:37,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:23:37,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-10-11 02:23:37,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133623277] [2021-10-11 02:23:37,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 02:23:37,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 02:23:37,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-10-11 02:23:37,479 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 15 states. [2021-10-11 02:23:38,348 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-10-11 02:23:39,402 WARN L197 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-10-11 02:23:40,995 WARN L197 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-10-11 02:23:42,083 WARN L197 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-10-11 02:23:42,953 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-10-11 02:23:44,028 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-10-11 02:23:44,950 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2021-10-11 02:23:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:45,326 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-10-11 02:23:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-11 02:23:45,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 11 [2021-10-11 02:23:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:45,329 INFO L225 Difference]: With dead ends: 68 [2021-10-11 02:23:45,329 INFO L226 Difference]: Without dead ends: 66 [2021-10-11 02:23:45,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-10-11 02:23:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-11 02:23:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 25. [2021-10-11 02:23:45,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:23:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-10-11 02:23:45,337 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2021-10-11 02:23:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:45,338 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-10-11 02:23:45,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 02:23:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-10-11 02:23:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:23:45,338 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:45,339 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:45,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:45,539 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash 457429002, now seen corresponding path program 4 times [2021-10-11 02:23:45,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:45,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731629493] [2021-10-11 02:23:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:45,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:23:45,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696562894] [2021-10-11 02:23:45,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-11 02:23:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:46,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:46,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:46,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:23:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:23:47,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:49,265 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 28 [2021-10-11 02:23:49,471 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2021-10-11 02:23:51,365 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2021-10-11 02:23:51,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731629493] [2021-10-11 02:23:51,412 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:51,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696562894] [2021-10-11 02:23:51,412 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:23:51,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [532477758] [2021-10-11 02:23:51,414 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:23:51,415 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:51,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:51,415 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:51,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:51,421 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7754d76d at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-11 02:23:51,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:51,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:23:51,424 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-10-11 02:23:51,424 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:51,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-10-11 02:23:51,656 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,656 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,656 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,656 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,656 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,656 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,656 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,657 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,657 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,657 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,657 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,657 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,657 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,657 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,657 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,657 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,657 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:23:51,657 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:23:51,667 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:23:51,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:51 BoogieIcfgContainer [2021-10-11 02:23:51,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:51,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:51,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:51,668 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:51,669 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:25" (3/4) ... [2021-10-11 02:23:51,672 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:23:51,672 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:51,673 INFO L168 Benchmark]: Toolchain (without parser) took 27440.07 ms. Allocated memory was 75.5 MB in the beginning and 199.2 MB in the end (delta: 123.7 MB). Free memory was 37.7 MB in the beginning and 131.2 MB in the end (delta: -93.5 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:51,673 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 75.5 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:51,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.00 ms. Allocated memory was 75.5 MB in the beginning and 94.4 MB in the end (delta: 18.9 MB). Free memory was 37.5 MB in the beginning and 70.4 MB in the end (delta: -32.9 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:51,674 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.82 ms. Allocated memory is still 94.4 MB. Free memory was 70.2 MB in the beginning and 68.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:51,674 INFO L168 Benchmark]: Boogie Preprocessor took 27.18 ms. Allocated memory is still 94.4 MB. Free memory was 68.7 MB in the beginning and 67.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:51,675 INFO L168 Benchmark]: RCFGBuilder took 566.46 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 63.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:51,675 INFO L168 Benchmark]: TraceAbstraction took 26497.24 ms. Allocated memory was 94.4 MB in the beginning and 199.2 MB in the end (delta: 104.9 MB). Free memory was 63.3 MB in the beginning and 131.2 MB in the end (delta: -67.9 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:51,675 INFO L168 Benchmark]: Witness Printer took 4.17 ms. Allocated memory is still 199.2 MB. Free memory is still 131.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:51,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 75.5 MB. Free memory is still 54.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 295.00 ms. Allocated memory was 75.5 MB in the beginning and 94.4 MB in the end (delta: 18.9 MB). Free memory was 37.5 MB in the beginning and 70.4 MB in the end (delta: -32.9 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.82 ms. Allocated memory is still 94.4 MB. Free memory was 70.2 MB in the beginning and 68.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.18 ms. Allocated memory is still 94.4 MB. Free memory was 68.7 MB in the beginning and 67.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 566.46 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 63.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 26497.24 ms. Allocated memory was 94.4 MB in the beginning and 199.2 MB in the end (delta: 104.9 MB). Free memory was 63.3 MB in the beginning and 131.2 MB in the end (delta: -67.9 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.17 ms. Allocated memory is still 199.2 MB. Free memory is still 131.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND TRUE !cond [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 285abbae5ead4c9c261c327064d45c09bb5603aa [2021-10-11 02:23:54,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:54,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:54,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:54,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:54,626 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:54,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/ifeqn3.c [2021-10-11 02:23:54,697 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data/fd7da0375/336c3e1cb34a45ea9f115b0016710db0/FLAG5fec59bf9 [2021-10-11 02:23:55,278 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:55,280 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/sv-benchmarks/c/array-fpi/ifeqn3.c [2021-10-11 02:23:55,287 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data/fd7da0375/336c3e1cb34a45ea9f115b0016710db0/FLAG5fec59bf9 [2021-10-11 02:23:55,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/data/fd7da0375/336c3e1cb34a45ea9f115b0016710db0 [2021-10-11 02:23:55,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:55,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:55,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:55,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:55,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:55,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fb1211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55, skipping insertion in model container [2021-10-11 02:23:55,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:55,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:55,765 WARN L226 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_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2021-10-11 02:23:55,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:55,801 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:55,815 WARN L226 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_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2021-10-11 02:23:55,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:55,842 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:55,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55 WrapperNode [2021-10-11 02:23:55,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:55,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:55,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:55,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:55,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:55,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:55,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:55,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:55,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:55,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... [2021-10-11 02:23:56,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:56,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:56,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:56,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:56,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:23:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-11 02:23:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:23:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:56,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-11 02:23:56,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:56,696 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:23:56,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:56 BoogieIcfgContainer [2021-10-11 02:23:56,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:56,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:56,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:56,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:56,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:55" (1/3) ... [2021-10-11 02:23:56,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72440acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:56, skipping insertion in model container [2021-10-11 02:23:56,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:55" (2/3) ... [2021-10-11 02:23:56,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72440acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:56, skipping insertion in model container [2021-10-11 02:23:56,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:56" (3/3) ... [2021-10-11 02:23:56,708 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3.c [2021-10-11 02:23:56,723 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:56,727 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:23:56,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:23:56,782 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:56,782 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:56,783 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:56,783 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:56,783 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:56,783 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:56,783 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:56,783 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-10-11 02:23:56,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:23:56,809 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:56,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:56,811 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:56,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-10-11 02:23:56,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:56,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716180676] [2021-10-11 02:23:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:23:57,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:57,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:57,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716180676] [2021-10-11 02:23:57,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:57,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:57,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101895023] [2021-10-11 02:23:57,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:23:57,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:23:57,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:23:57,161 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-10-11 02:23:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:57,182 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-10-11 02:23:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:23:57,185 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-10-11 02:23:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:57,195 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:23:57,195 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:23:57,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:23:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:23:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:23:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:23:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-11 02:23:57,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-10-11 02:23:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:57,258 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-11 02:23:57,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:23:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-11 02:23:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:23:57,259 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:57,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:57,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:23:57,476 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-10-11 02:23:57,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:57,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31954039] [2021-10-11 02:23:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:57,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:23:57,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:57,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:57,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31954039] [2021-10-11 02:23:57,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:57,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:23:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313645845] [2021-10-11 02:23:57,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:23:57,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:23:57,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:57,961 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-10-11 02:23:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:58,467 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-10-11 02:23:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:23:58,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-10-11 02:23:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:58,482 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:23:58,482 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:23:58,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:23:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-11 02:23:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:23:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-11 02:23:58,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-11 02:23:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:58,509 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-11 02:23:58,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:23:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-11 02:23:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:23:58,510 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:58,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:58,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:23:58,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:58,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-10-11 02:23:58,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:58,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827025719] [2021-10-11 02:23:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:58,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:23:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:59,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:23:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:23:59,061 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-11 02:23:59,063 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:59,077 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:59,080 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:23:59,081 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2021-10-11 02:23:59,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:23:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:23:59,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:59,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827025719] [2021-10-11 02:23:59,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:59,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:23:59,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306532202] [2021-10-11 02:23:59,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:59,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:59,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:59,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:23:59,245 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2021-10-11 02:23:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:59,677 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-10-11 02:23:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:23:59,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 02:23:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:59,682 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:23:59,682 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:23:59,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:23:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:23:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-10-11 02:23:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:23:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-11 02:23:59,691 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-11 02:23:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:59,692 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-11 02:23:59,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-11 02:23:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 02:23:59,693 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:59,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:59,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:23:59,913 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:59,913 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-10-11 02:23:59,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:59,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708274329] [2021-10-11 02:23:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:24:00,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:00,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708274329] [2021-10-11 02:24:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [318955942] [2021-10-11 02:24:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:00,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:24:00,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:01,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:01,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:24:01,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 8] total 18 [2021-10-11 02:24:01,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526835497] [2021-10-11 02:24:01,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:24:01,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:24:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:24:01,227 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2021-10-11 02:24:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:02,262 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-10-11 02:24:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:24:02,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-10-11 02:24:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:02,273 INFO L225 Difference]: With dead ends: 60 [2021-10-11 02:24:02,273 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:24:02,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:24:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:24:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-10-11 02:24:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:24:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-11 02:24:02,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-10-11 02:24:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:02,286 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-11 02:24:02,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:24:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-11 02:24:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 02:24:02,289 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:02,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:02,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:02,690 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-10-11 02:24:02,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:02,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905144578] [2021-10-11 02:24:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:02,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:24:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,077 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-11 02:24:03,080 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:03,096 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:03,101 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:24:03,101 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2021-10-11 02:24:03,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:24:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:24:03,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:24:03,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:24:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:24:03,305 INFO L348 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2021-10-11 02:24:03,306 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 165 [2021-10-11 02:24:03,320 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:03,404 INFO L625 ElimStorePlain]: treesize reduction 107, result has 60.1 percent of original size [2021-10-11 02:24:03,413 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:24:03,414 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:187, output treesize:161 [2021-10-11 02:24:03,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-10-11 02:24:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:24:03,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:04,454 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-10-11 02:24:15,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905144578] [2021-10-11 02:24:15,555 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:24:15,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2070612428] [2021-10-11 02:24:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:24:15,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:15,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3dcd9575 [2021-10-11 02:24:15,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202016149] [2021-10-11 02:24:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f64d72f4-a99e-4f1c-89c3-306cc5fc51e5/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:24:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:16,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 02:24:16,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:16,138 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3dcd9575 [2021-10-11 02:24:16,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:16,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:24:16,139 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-11 02:24:16,139 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:24:16,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:16,758 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:24:16,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:16 BoogieIcfgContainer [2021-10-11 02:24:16,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:16,759 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:16,759 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:16,759 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:16,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:56" (3/4) ... [2021-10-11 02:24:16,763 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:24:16,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:16,764 INFO L168 Benchmark]: Toolchain (without parser) took 21160.97 ms. Allocated memory was 58.7 MB in the beginning and 115.3 MB in the end (delta: 56.6 MB). Free memory was 38.6 MB in the beginning and 88.0 MB in the end (delta: -49.4 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:16,765 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 58.7 MB. Free memory is still 40.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:16,765 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.85 ms. Allocated memory is still 58.7 MB. Free memory was 38.5 MB in the beginning and 27.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:16,766 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.41 ms. Allocated memory is still 58.7 MB. Free memory was 27.4 MB in the beginning and 41.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:16,766 INFO L168 Benchmark]: Boogie Preprocessor took 61.29 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 40.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:16,767 INFO L168 Benchmark]: RCFGBuilder took 688.67 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 40.0 MB in the beginning and 66.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:16,768 INFO L168 Benchmark]: TraceAbstraction took 20057.81 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 65.9 MB in the beginning and 88.0 MB in the end (delta: -22.2 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:16,768 INFO L168 Benchmark]: Witness Printer took 4.20 ms. Allocated memory is still 115.3 MB. Free memory is still 88.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:16,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 58.7 MB. Free memory is still 40.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.85 ms. Allocated memory is still 58.7 MB. Free memory was 38.5 MB in the beginning and 27.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.41 ms. Allocated memory is still 58.7 MB. Free memory was 27.4 MB in the beginning and 41.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.29 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 40.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 688.67 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 40.0 MB in the beginning and 66.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20057.81 ms. Allocated memory was 86.0 MB in the beginning and 115.3 MB in the end (delta: 29.4 MB). Free memory was 65.9 MB in the beginning and 88.0 MB in the end (delta: -22.2 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.20 ms. Allocated memory is still 115.3 MB. Free memory is still 88.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i