./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array8_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array8_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:39:57,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:39:57,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:39:57,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:39:57,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:39:57,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:39:57,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:39:57,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:39:57,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:39:57,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:39:57,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:39:57,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:39:57,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:39:57,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:39:57,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:39:57,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:39:57,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:39:57,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:39:57,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:39:57,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:39:57,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:39:57,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:39:57,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:39:57,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:39:57,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:39:57,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:39:57,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:39:57,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:39:57,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:39:57,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:39:57,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:39:57,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:39:57,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:39:57,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:39:57,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:39:57,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:39:57,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:39:57,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:39:57,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:39:57,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:39:57,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:39:57,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:39:57,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:39:57,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:39:57,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:39:57,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:39:57,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:39:57,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:39:57,948 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:39:57,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:39:57,948 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:39:57,949 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:39:57,949 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:39:57,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:39:57,949 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:39:57,950 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:39:57,950 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:39:57,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:39:57,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:39:57,951 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:39:57,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:39:57,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:39:57,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:39:57,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:39:57,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:39:57,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:39:57,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:39:57,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:39:57,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:39:57,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:39:57,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:39:57,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:39:57,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:39:57,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:39:57,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:39:57,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:39:57,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:39:57,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:39:57,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:39:57,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:39:57,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:39:57,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:39:57,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:39:57,958 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_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2021-11-23 02:39:58,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:39:58,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:39:58,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:39:58,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:39:58,294 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:39:58,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-patterns/array8_pattern.c [2021-11-23 02:39:58,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/data/b2a0da99f/907218741af24cdabcb580dc669f8b7c/FLAGbfb3473e6 [2021-11-23 02:39:59,057 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:39:59,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/sv-benchmarks/c/array-patterns/array8_pattern.c [2021-11-23 02:39:59,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/data/b2a0da99f/907218741af24cdabcb580dc669f8b7c/FLAGbfb3473e6 [2021-11-23 02:39:59,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/data/b2a0da99f/907218741af24cdabcb580dc669f8b7c [2021-11-23 02:39:59,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:39:59,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:39:59,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:39:59,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:39:59,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:39:59,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75eb7aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59, skipping insertion in model container [2021-11-23 02:39:59,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:39:59,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:39:59,626 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2021-11-23 02:39:59,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:39:59,658 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:39:59,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2021-11-23 02:39:59,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:39:59,749 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:39:59,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59 WrapperNode [2021-11-23 02:39:59,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:39:59,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:39:59,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:39:59,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:39:59,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,797 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-11-23 02:39:59,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:39:59,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:39:59,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:39:59,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:39:59,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:39:59,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:39:59,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:39:59,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:39:59,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (1/1) ... [2021-11-23 02:39:59,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:39:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:39:59,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:39:59,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:39:59,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:39:59,930 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:39:59,930 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:39:59,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:39:59,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:39:59,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:39:59,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:39:59,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:39:59,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:39:59,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:40:00,016 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:40:00,018 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:40:00,220 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:40:00,278 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:40:00,278 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:40:00,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:00 BoogieIcfgContainer [2021-11-23 02:40:00,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:40:00,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:40:00,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:40:00,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:40:00,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:39:59" (1/3) ... [2021-11-23 02:40:00,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277b74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:00, skipping insertion in model container [2021-11-23 02:40:00,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:39:59" (2/3) ... [2021-11-23 02:40:00,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277b74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:00, skipping insertion in model container [2021-11-23 02:40:00,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:00" (3/3) ... [2021-11-23 02:40:00,292 INFO L111 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2021-11-23 02:40:00,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:40:00,299 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:40:00,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:40:00,406 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:40:00,406 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:40:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:40:00,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:00,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:00,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash -41992950, now seen corresponding path program 1 times [2021-11-23 02:40:00,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:00,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269343454] [2021-11-23 02:40:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:00,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:00,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:00,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269343454] [2021-11-23 02:40:00,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269343454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:00,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:00,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:40:00,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520204046] [2021-11-23 02:40:00,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:00,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:40:00,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:40:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:40:00,718 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:40:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:00,761 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-23 02:40:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:40:00,764 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:40:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:00,771 INFO L225 Difference]: With dead ends: 24 [2021-11-23 02:40:00,772 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 02:40:00,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:40:00,779 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:00,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:40:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 02:40:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 02:40:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-23 02:40:00,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-11-23 02:40:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:00,822 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-23 02:40:00,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:40:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-23 02:40:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:40:00,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:00,824 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:00,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:40:00,825 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:00,826 INFO L85 PathProgramCache]: Analyzing trace with hash -682917570, now seen corresponding path program 1 times [2021-11-23 02:40:00,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:00,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388923310] [2021-11-23 02:40:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:00,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:00,852 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:00,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860316043] [2021-11-23 02:40:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:00,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:00,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:00,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:00,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:40:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:01,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:40:01,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:01,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:40:01,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:01,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388923310] [2021-11-23 02:40:01,159 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:01,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860316043] [2021-11-23 02:40:01,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860316043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:01,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:01,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:40:01,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832545968] [2021-11-23 02:40:01,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:01,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:01,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:01,165 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:01,235 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-23 02:40:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:40:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-23 02:40:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:01,238 INFO L225 Difference]: With dead ends: 30 [2021-11-23 02:40:01,238 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 02:40:01,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:40:01,241 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:01,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:40:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 02:40:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 02:40:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 02:40:01,251 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-23 02:40:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:01,251 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 02:40:01,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 02:40:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:40:01,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:01,253 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:01,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:01,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:01,479 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:01,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash -647612129, now seen corresponding path program 1 times [2021-11-23 02:40:01,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:01,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395137580] [2021-11-23 02:40:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:01,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:01,547 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:01,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512517434] [2021-11-23 02:40:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:01,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:01,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:01,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:01,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:40:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:01,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 02:40:01,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:01,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:40:01,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 02:40:02,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:02,633 INFO L354 Elim1Store]: treesize reduction 72, result has 4.0 percent of original size [2021-11-23 02:40:02,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 69 [2021-11-23 02:40:04,120 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-11-23 02:40:04,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 28 [2021-11-23 02:40:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:04,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:08,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395137580] [2021-11-23 02:40:08,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512517434] [2021-11-23 02:40:08,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512517434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:40:08,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504884183] [2021-11-23 02:40:08,677 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:08,677 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:08,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:08,696 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:08,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:08,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:08,959 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:40:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:40:08,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:08,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:08,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:40:09,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:40:09,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:09,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:09,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:09,279 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:40:09,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:40:09,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:09,417 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:09,417 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:40:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:09,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:09,712 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:40:09,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:40:10,065 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:40:10,106 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:12,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '291#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:40:12,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:12,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:40:12,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-23 02:40:12,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554279580] [2021-11-23 02:40:12,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:12,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:40:12,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:12,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:40:12,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=761, Unknown=3, NotChecked=0, Total=870 [2021-11-23 02:40:12,297 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:12,374 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-23 02:40:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:40:12,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-23 02:40:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:12,376 INFO L225 Difference]: With dead ends: 35 [2021-11-23 02:40:12,377 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 02:40:12,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=106, Invalid=761, Unknown=3, NotChecked=0, Total=870 [2021-11-23 02:40:12,379 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:12,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-11-23 02:40:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 02:40:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-11-23 02:40:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:40:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 02:40:12,388 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2021-11-23 02:40:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:12,389 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 02:40:12,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 02:40:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:40:12,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:12,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:12,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 02:40:12,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:40:12,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1398625999, now seen corresponding path program 2 times [2021-11-23 02:40:12,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:12,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572442234] [2021-11-23 02:40:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:12,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:12,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:12,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434219118] [2021-11-23 02:40:12,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:40:12,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:12,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:12,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:12,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:40:12,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:40:12,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:40:12,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:40:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:12,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:40:12,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:12,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572442234] [2021-11-23 02:40:12,938 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:12,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434219118] [2021-11-23 02:40:12,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434219118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:40:12,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1299188921] [2021-11-23 02:40:12,942 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:12,942 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:12,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:12,943 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:12,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:13,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:13,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:13,105 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:40:13,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:40:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:13,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:13,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:40:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:13,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 02:40:13,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:13,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:13,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:13,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:13,391 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:40:13,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-23 02:40:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:13,581 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:13,582 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:40:13,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:13,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:13,703 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:40:13,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:40:13,823 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:40:13,853 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:14,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '515#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:40:14,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:14,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:40:14,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 02:40:14,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354743711] [2021-11-23 02:40:14,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:14,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:40:14,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:14,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:40:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:40:14,999 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:40:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:15,140 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-23 02:40:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:40:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-23 02:40:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:15,142 INFO L225 Difference]: With dead ends: 49 [2021-11-23 02:40:15,143 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 02:40:15,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:40:15,145 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:15,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 47 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:40:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 02:40:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2021-11-23 02:40:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:40:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-23 02:40:15,156 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2021-11-23 02:40:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:15,157 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-23 02:40:15,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:40:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-23 02:40:15,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:40:15,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:15,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:15,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:15,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:15,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash -87694224, now seen corresponding path program 3 times [2021-11-23 02:40:15,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:15,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072796889] [2021-11-23 02:40:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:15,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:15,402 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:15,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179062698] [2021-11-23 02:40:15,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:40:15,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:15,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:15,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:40:15,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:40:15,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:40:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:40:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:15,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:40:15,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072796889] [2021-11-23 02:40:15,622 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179062698] [2021-11-23 02:40:15,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179062698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:40:15,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1378757210] [2021-11-23 02:40:15,629 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:15,630 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:15,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:15,631 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:15,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:15,785 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 02:40:15,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-23 02:40:15,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:15,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:15,894 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:40:15,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:40:15,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:15,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:15,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:40:16,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:16,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:16,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:16,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:16,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:16,162 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:40:16,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:40:16,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:16,270 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:16,271 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:40:16,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:16,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:16,523 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:40:16,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:40:16,762 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-23 02:40:16,765 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:18,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '775#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:40:18,550 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:18,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:40:18,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 02:40:18,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341251023] [2021-11-23 02:40:18,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:18,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:40:18,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:40:18,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:40:18,552 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:40:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:18,684 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-11-23 02:40:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:40:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-23 02:40:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:18,686 INFO L225 Difference]: With dead ends: 42 [2021-11-23 02:40:18,686 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 02:40:18,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:40:18,688 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:18,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:40:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 02:40:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-11-23 02:40:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:40:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-23 02:40:18,700 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 19 [2021-11-23 02:40:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:18,701 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-23 02:40:18,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:40:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-23 02:40:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:40:18,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:18,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:18,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:18,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:18,919 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1576211870, now seen corresponding path program 4 times [2021-11-23 02:40:18,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:18,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528950281] [2021-11-23 02:40:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:18,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:18,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:18,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648511075] [2021-11-23 02:40:18,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:40:18,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:18,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:18,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:18,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:40:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:19,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 02:40:19,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:19,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:40:19,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 02:40:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:19,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 02:40:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:19,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:19,808 INFO L354 Elim1Store]: treesize reduction 106, result has 36.5 percent of original size [2021-11-23 02:40:19,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 129 [2021-11-23 02:40:21,217 INFO L354 Elim1Store]: treesize reduction 80, result has 33.9 percent of original size [2021-11-23 02:40:21,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 102 [2021-11-23 02:40:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:21,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:27,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:27,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528950281] [2021-11-23 02:40:27,225 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:27,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648511075] [2021-11-23 02:40:27,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648511075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:40:27,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958139710] [2021-11-23 02:40:27,228 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:27,228 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:27,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:27,228 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:27,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:27,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,377 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:40:27,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:40:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:40:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:40:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:27,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:27,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:27,586 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:40:27,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:40:27,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:27,685 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:27,685 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:40:27,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:27,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:27,897 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:40:27,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:40:28,114 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:40:28,143 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:30,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1014#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:40:30,314 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:30,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:40:30,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-23 02:40:30,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480199609] [2021-11-23 02:40:30,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:30,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:40:30,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:40:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:40:30,316 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:30,413 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-11-23 02:40:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:40:30,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-23 02:40:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:30,416 INFO L225 Difference]: With dead ends: 51 [2021-11-23 02:40:30,416 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 02:40:30,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:40:30,419 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:30,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-11-23 02:40:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 02:40:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-23 02:40:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:40:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-23 02:40:30,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 20 [2021-11-23 02:40:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:30,431 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-23 02:40:30,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-23 02:40:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:40:30,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:30,433 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:30,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:30,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:30,659 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1617693232, now seen corresponding path program 5 times [2021-11-23 02:40:30,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697086338] [2021-11-23 02:40:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:30,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:30,689 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830184541] [2021-11-23 02:40:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:40:30,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:30,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:30,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:30,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:40:30,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:40:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:40:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:40:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:30,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:40:30,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697086338] [2021-11-23 02:40:30,943 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830184541] [2021-11-23 02:40:30,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830184541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:40:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1967754256] [2021-11-23 02:40:30,946 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:30,946 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:30,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:30,947 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:30,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:30,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,067 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:40:31,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:40:31,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:40:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:40:31,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:31,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:31,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:31,278 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:40:31,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:40:31,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:31,379 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:31,380 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:40:31,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:31,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:31,603 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:40:31,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:40:31,818 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:40:31,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:33,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1304#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:40:33,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:33,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:40:33,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 02:40:33,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681867257] [2021-11-23 02:40:33,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:33,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:40:33,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:40:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:40:33,573 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:40:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:33,804 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-23 02:40:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:40:33,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-23 02:40:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:33,805 INFO L225 Difference]: With dead ends: 81 [2021-11-23 02:40:33,806 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 02:40:33,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:40:33,807 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:33,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 76 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:40:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 02:40:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2021-11-23 02:40:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:40:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-23 02:40:33,823 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 21 [2021-11-23 02:40:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:33,824 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-23 02:40:33,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:40:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-23 02:40:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 02:40:33,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:33,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:33,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:34,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:40:34,043 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash 479023423, now seen corresponding path program 6 times [2021-11-23 02:40:34,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:34,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463224003] [2021-11-23 02:40:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:34,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:34,071 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:34,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622898780] [2021-11-23 02:40:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:40:34,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:34,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:34,084 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:34,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:40:34,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:40:34,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:40:34,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 02:40:34,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:34,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:40:34,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 02:40:34,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:40:34,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-23 02:40:34,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:35,038 INFO L354 Elim1Store]: treesize reduction 181, result has 30.1 percent of original size [2021-11-23 02:40:35,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 132 treesize of output 152 [2021-11-23 02:40:38,466 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:40:38,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 133 treesize of output 61 [2021-11-23 02:40:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:38,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:49,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:49,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463224003] [2021-11-23 02:40:49,170 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:49,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622898780] [2021-11-23 02:40:49,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622898780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:40:49,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267480315] [2021-11-23 02:40:49,173 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:40:49,173 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:49,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:49,173 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:49,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:49,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,279 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:40:49,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:40:49,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:40:49,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:40:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,485 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:40:49,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:40:49,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,587 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:40:49,587 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:40:49,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:40:49,834 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:40:49,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:40:50,076 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:40:50,103 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:52,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1656#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:40:52,647 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:52,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:40:52,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-23 02:40:52,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519427244] [2021-11-23 02:40:52,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:52,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:40:52,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:40:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1115, Unknown=6, NotChecked=0, Total=1260 [2021-11-23 02:40:52,655 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:53,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:53,886 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2021-11-23 02:40:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:40:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-23 02:40:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:53,888 INFO L225 Difference]: With dead ends: 83 [2021-11-23 02:40:53,888 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 02:40:53,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=153, Invalid=1246, Unknown=7, NotChecked=0, Total=1406 [2021-11-23 02:40:53,889 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:53,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 142 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 188 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2021-11-23 02:40:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 02:40:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2021-11-23 02:40:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 02:40:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-11-23 02:40:53,906 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 22 [2021-11-23 02:40:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:53,906 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-11-23 02:40:53,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:40:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-11-23 02:40:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:40:53,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:53,908 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:53,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:54,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:54,119 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash -420635419, now seen corresponding path program 1 times [2021-11-23 02:40:54,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:54,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027042845] [2021-11-23 02:40:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:54,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:54,133 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:54,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163539752] [2021-11-23 02:40:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:54,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:54,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:54,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:40:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 02:40:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:40:54,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 02:40:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:40:54,586 INFO L354 Elim1Store]: treesize reduction 76, result has 3.8 percent of original size [2021-11-23 02:40:54,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 70 [2021-11-23 02:41:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:41:02,297 INFO L354 Elim1Store]: treesize reduction 108, result has 2.7 percent of original size [2021-11-23 02:41:02,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 72 [2021-11-23 02:41:06,094 INFO L354 Elim1Store]: treesize reduction 76, result has 8.4 percent of original size [2021-11-23 02:41:06,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 28 [2021-11-23 02:41:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:41:06,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:41:40,176 WARN L227 SmtUtils]: Spent 7.42s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:42:18,304 WARN L227 SmtUtils]: Spent 29.16s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:42:18,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027042845] [2021-11-23 02:42:18,305 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:42:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163539752] [2021-11-23 02:42:18,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163539752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118826092] [2021-11-23 02:42:18,307 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:42:18,308 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:18,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:18,308 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:18,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:18,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,430 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 02:42:18,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-23 02:42:18,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,540 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:42:18,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:42:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:42:18,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:18,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:18,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:18,755 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:42:18,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:42:18,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:18,826 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:18,826 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:42:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:19,072 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:42:19,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:42:29,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:29,080 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:42:29,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:42:29,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:29,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:29,184 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:42:29,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:42:29,339 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:42:29,361 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:34,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2040#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:34,045 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:34,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:42:34,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-23 02:42:34,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518808974] [2021-11-23 02:42:34,046 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:34,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:42:34,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:42:34,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1165, Unknown=18, NotChecked=0, Total=1332 [2021-11-23 02:42:34,048 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:42:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:34,101 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-11-23 02:42:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:42:34,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-11-23 02:42:34,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:34,102 INFO L225 Difference]: With dead ends: 82 [2021-11-23 02:42:34,103 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 02:42:34,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 85.4s TimeCoverageRelationStatistics Valid=149, Invalid=1165, Unknown=18, NotChecked=0, Total=1332 [2021-11-23 02:42:34,104 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:34,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 106 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 86 Unchecked, 0.0s Time] [2021-11-23 02:42:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 02:42:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-11-23 02:42:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 02:42:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-11-23 02:42:34,122 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 24 [2021-11-23 02:42:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:34,123 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-11-23 02:42:34,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:42:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-11-23 02:42:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 02:42:34,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:34,125 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:34,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:34,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 02:42:34,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1964589743, now seen corresponding path program 7 times [2021-11-23 02:42:34,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007672964] [2021-11-23 02:42:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:34,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:34,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:42:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552500841] [2021-11-23 02:42:34,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:42:34,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:34,346 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:34,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:42:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:42:34,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:34,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:42:34,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007672964] [2021-11-23 02:42:34,655 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:42:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552500841] [2021-11-23 02:42:34,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552500841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428569511] [2021-11-23 02:42:34,658 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:42:34,658 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:34,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:34,659 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:34,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:34,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,772 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:42:34,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:42:34,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:42:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:42:34,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:34,982 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:42:34,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:42:35,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:35,047 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:35,047 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:42:35,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:35,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:35,262 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:42:35,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:42:35,444 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:42:35,467 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:37,457 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2437#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:37,458 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:37,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:42:37,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-23 02:42:37,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219966644] [2021-11-23 02:42:37,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:37,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:42:37,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:37,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:42:37,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:42:37,461 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:42:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:37,872 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-11-23 02:42:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:42:37,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-23 02:42:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:37,888 INFO L225 Difference]: With dead ends: 113 [2021-11-23 02:42:37,888 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 02:42:37,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 02:42:37,891 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 76 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:37,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 100 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:42:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 02:42:37,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-11-23 02:42:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:42:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-11-23 02:42:37,914 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 23 [2021-11-23 02:42:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:37,915 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-11-23 02:42:37,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:42:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-11-23 02:42:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 02:42:37,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:37,917 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:37,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:38,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:42:38,131 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash -460002288, now seen corresponding path program 8 times [2021-11-23 02:42:38,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:38,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690514182] [2021-11-23 02:42:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:38,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:38,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:42:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224090445] [2021-11-23 02:42:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:42:38,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:38,148 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:38,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:42:38,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 02:42:38,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:42:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:38,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:42:38,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:38,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690514182] [2021-11-23 02:42:38,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:42:38,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224090445] [2021-11-23 02:42:38,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224090445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:42:38,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360194586] [2021-11-23 02:42:38,479 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:42:38,480 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:38,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:38,480 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:38,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,640 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-23 02:42:38,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-23 02:42:38,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,758 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:42:38,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:42:38,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:42:38,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:38,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:38,938 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:42:38,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:42:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:39,011 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:39,012 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:42:39,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:39,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:39,223 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:42:39,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:42:39,388 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-23 02:42:39,390 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:42:41,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2914#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:42:41,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:42:41,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:42:41,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-23 02:42:41,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543977219] [2021-11-23 02:42:41,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:42:41,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:42:41,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:41,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:42:41,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:42:41,016 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:42:41,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:41,225 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-11-23 02:42:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:42:41,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-23 02:42:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:41,227 INFO L225 Difference]: With dead ends: 101 [2021-11-23 02:42:41,227 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 02:42:41,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:42:41,229 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:41,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 82 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:42:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 02:42:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2021-11-23 02:42:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 57 states have internal predecessors, (67), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 02:42:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2021-11-23 02:42:41,246 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 23 [2021-11-23 02:42:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:41,247 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2021-11-23 02:42:41,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:42:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2021-11-23 02:42:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:42:41,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:41,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:41,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:42:41,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:41,467 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1375403522, now seen corresponding path program 9 times [2021-11-23 02:42:41,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:41,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619361583] [2021-11-23 02:42:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:41,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:41,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:42:41,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749231296] [2021-11-23 02:42:41,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:42:41,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:42:41,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:42:41,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:42:41,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:42:41,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:42:41,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:42:41,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 02:42:41,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:42:41,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:42:41,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:42:41,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2021-11-23 02:42:41,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2021-11-23 02:42:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:41,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2021-11-23 02:42:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:45,690 INFO L354 Elim1Store]: treesize reduction 226, result has 35.6 percent of original size [2021-11-23 02:42:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 150 treesize of output 205 [2021-11-23 02:42:54,924 INFO L354 Elim1Store]: treesize reduction 152, result has 34.8 percent of original size [2021-11-23 02:42:54,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 172 treesize of output 176 [2021-11-23 02:42:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:55,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:42:59,316 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_ULTIMATE.start_main_~index~0#1_40| Int) (|aux_div_ULTIMATE.start_main_~index~0#1_40| Int) (aux_div_~ARR_SIZE~0_25 Int)) (let ((.cse6 (* 2 aux_div_~ARR_SIZE~0_25)) (.cse5 (+ (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|) |aux_mod_ULTIMATE.start_main_~index~0#1_40|))) (or (<= (let ((.cse3 (* |aux_mod_ULTIMATE.start_main_~index~0#1_40| 4)) (.cse4 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 .cse4) (* |c_ULTIMATE.start_main_~num~0#1| (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|)))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 .cse4) (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|)))) (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12))))))) aux_div_~ARR_SIZE~0_25) (= |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0) (< .cse5 0) (<= .cse6 3) (<= 2 |aux_mod_ULTIMATE.start_main_~index~0#1_40|) (<= .cse6 .cse5) (< |aux_mod_ULTIMATE.start_main_~index~0#1_40| 0)))) (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (let ((.cse7 (let ((.cse14 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8))) (let ((.cse12 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse13 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse14))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse12 .cse13 (* |c_ULTIMATE.start_main_~num~0#1| (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|)))))) (let ((.cse9 (let ((.cse11 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse14))) (store (select .cse10 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store .cse12 .cse13 (* |c_ULTIMATE.start_main_~num~0#1| (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|)))) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse11))))) (let ((.cse8 (select (store .cse10 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse9) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse8 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse8 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse9 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse8 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse9 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse9 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse8 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse9 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))))))) (or (< (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|) 0) (<= .cse7 (+ |aux_div_ULTIMATE.start_main_~index~0#1_40| 1)) (<= .cse7 2))))) is different from false [2021-11-23 02:42:59,329 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:59,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619361583] [2021-11-23 02:42:59,329 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:42:59,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749231296] [2021-11-23 02:42:59,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749231296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:42:59,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663501275] [2021-11-23 02:42:59,331 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:42:59,331 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:42:59,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:42:59,332 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:42:59,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:42:59,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,460 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:42:59,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:42:59,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:42:59,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 02:42:59,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:42:59,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:59,623 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:42:59,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2021-11-23 02:42:59,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:59,691 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:42:59,692 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:42:59,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:59,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:42:59,888 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:42:59,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:43:00,070 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:43:00,094 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:43:03,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3335#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:43:03,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:43:03,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:43:03,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-23 02:43:03,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319903267] [2021-11-23 02:43:03,105 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:43:03,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:43:03,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:43:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1252, Unknown=7, NotChecked=72, Total=1482 [2021-11-23 02:43:03,107 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:43:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:03,619 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-11-23 02:43:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:43:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-23 02:43:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:03,622 INFO L225 Difference]: With dead ends: 93 [2021-11-23 02:43:03,622 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 02:43:03,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=177, Invalid=1460, Unknown=7, NotChecked=78, Total=1722 [2021-11-23 02:43:03,625 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:03,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2021-11-23 02:43:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 02:43:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-11-23 02:43:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:43:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-11-23 02:43:03,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 24 [2021-11-23 02:43:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:03,660 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-11-23 02:43:03,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:43:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-11-23 02:43:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:43:03,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:03,667 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:03,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:43:03,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:43:03,895 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1547988136, now seen corresponding path program 2 times [2021-11-23 02:43:03,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:03,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591390596] [2021-11-23 02:43:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:03,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:03,906 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:43:03,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095876760] [2021-11-23 02:43:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:43:03,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:43:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:43:03,912 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:43:03,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:43:04,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 02:43:04,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:43:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 02:43:04,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:43:04,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:43:04,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 02:43:04,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:04,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 02:43:05,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:05,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:05,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:05,515 INFO L354 Elim1Store]: treesize reduction 114, result has 34.9 percent of original size [2021-11-23 02:43:05,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 133 [2021-11-23 02:43:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:22,241 INFO L354 Elim1Store]: treesize reduction 214, result has 35.0 percent of original size [2021-11-23 02:43:22,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 168 treesize of output 221 [2021-11-23 02:43:45,720 INFO L354 Elim1Store]: treesize reduction 188, result has 33.1 percent of original size [2021-11-23 02:43:45,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 168 treesize of output 200 [2021-11-23 02:43:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:46,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:44:02,501 WARN L227 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:44:02,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591390596] [2021-11-23 02:44:02,502 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:44:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095876760] [2021-11-23 02:44:02,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095876760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124317914] [2021-11-23 02:44:02,504 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:44:02,505 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:44:02,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:44:02,505 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:44:02,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:44:02,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:02,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:02,643 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:44:02,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:44:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:02,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:44:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:02,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 02:44:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:02,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:44:02,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:02,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:02,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:02,932 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:44:02,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-23 02:44:03,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:03,037 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:44:03,038 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:44:03,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:03,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:03,117 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:44:03,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:44:04,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:04,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:44:05,840 INFO L354 Elim1Store]: treesize reduction 539, result has 25.1 percent of original size [2021-11-23 02:44:05,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 361 treesize of output 459 [2021-11-23 02:46:33,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:33,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:33,507 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:46:33,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:46:33,814 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:46:33,841 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:46:35,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3756#(and (<= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 |#NULL.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= 0 |ULTIMATE.start_main_~#array2~0#1.offset|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (<= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:46:35,838 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:46:35,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:46:35,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-23 02:46:35,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950108225] [2021-11-23 02:46:35,839 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 02:46:35,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:46:35,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:46:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1110, Unknown=13, NotChecked=0, Total=1260 [2021-11-23 02:46:35,840 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:46:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:39,494 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2021-11-23 02:46:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:46:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-23 02:46:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:39,497 INFO L225 Difference]: With dead ends: 128 [2021-11-23 02:46:39,497 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 02:46:39,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=162, Invalid=1305, Unknown=15, NotChecked=0, Total=1482 [2021-11-23 02:46:39,499 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:39,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 138 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2021-11-23 02:46:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 02:46:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-11-23 02:46:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 73 states have internal predecessors, (85), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 02:46:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2021-11-23 02:46:39,529 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 26 [2021-11-23 02:46:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:39,530 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2021-11-23 02:46:39,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:46:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2021-11-23 02:46:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:46:39,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:39,532 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:39,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 02:46:39,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:46:39,746 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:39,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash 311929296, now seen corresponding path program 10 times [2021-11-23 02:46:39,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:39,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233005061] [2021-11-23 02:46:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:39,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:39,777 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:46:39,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165769244] [2021-11-23 02:46:39,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:46:39,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:39,786 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:39,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:46:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:39,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:46:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:40,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:46:40,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:40,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233005061] [2021-11-23 02:46:40,170 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:46:40,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165769244] [2021-11-23 02:46:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165769244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:46:40,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749627383] [2021-11-23 02:46:40,172 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 02:46:40,173 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:46:40,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:46:40,173 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:46:40,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:46:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:40,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:40,293 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-23 02:46:40,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-23 02:46:40,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:40,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-23 02:46:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 02:46:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:40,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:40,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:40,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:40,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:40,600 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:46:40,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2021-11-23 02:46:40,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:40,749 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:46:40,750 INFO L388 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 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-23 02:46:40,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:40,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:46:40,857 INFO L354 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2021-11-23 02:46:40,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 133 [2021-11-23 02:46:40,944 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2021-11-23 02:46:40,968 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:46:42,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4287#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (* 2 |ULTIMATE.start_main_~sum~0#1|) (+ ~ARR_SIZE~0 1)) 1 0)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:46:42,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:46:42,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:46:42,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-23 02:46:42,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579260789] [2021-11-23 02:46:42,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:46:42,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:46:42,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:42,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:46:42,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:46:42,647 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:46:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:43,248 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-11-23 02:46:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:46:43,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-23 02:46:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:43,250 INFO L225 Difference]: With dead ends: 152 [2021-11-23 02:46:43,251 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:46:43,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=365, Invalid=1705, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:46:43,253 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:43,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 108 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:46:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:46:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 113. [2021-11-23 02:46:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 84 states have internal predecessors, (98), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 02:46:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2021-11-23 02:46:43,283 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 25 [2021-11-23 02:46:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:43,284 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2021-11-23 02:46:43,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:46:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2021-11-23 02:46:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:46:43,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:43,285 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:43,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:43,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:43,486 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:43,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1081028257, now seen corresponding path program 11 times [2021-11-23 02:46:43,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:43,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755062881] [2021-11-23 02:46:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:43,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:43,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:46:43,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752633032] [2021-11-23 02:46:43,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:46:43,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:46:43,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:43,500 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:46:43,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5125fed-ef7d-46c1-b76e-9e51ab483d5c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:46:43,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 02:46:43,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:46:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 02:46:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:43,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 02:46:43,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 02:46:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 02:46:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-23 02:46:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,898 INFO L354 Elim1Store]: treesize reduction 180, result has 22.1 percent of original size [2021-11-23 02:46:43,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 93 [2021-11-23 02:46:43,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:43,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:44,084 INFO L354 Elim1Store]: treesize reduction 332, result has 18.4 percent of original size [2021-11-23 02:46:44,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 122 treesize of output 129 [2021-11-23 02:46:51,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:46:51,837 INFO L354 Elim1Store]: treesize reduction 495, result has 28.1 percent of original size [2021-11-23 02:46:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 7 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 29 case distinctions, treesize of input 186 treesize of output 287 [2021-11-23 02:51:40,886 INFO L354 Elim1Store]: treesize reduction 1310, result has 27.4 percent of original size [2021-11-23 02:51:40,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 10 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 550 treesize of output 790